This time I mean it when I say we’re nearly there, I promise!
It’s been a while since I updated you on our progress, we’ve been busy getting the factory ready and now we’re so close to calling the inspectors.
We’ve put the equipment in.
Factory water plumbing is finished.What a luxury to have hot flowing water from the tank!
The coolroom’s fully operational.
The the main thing to go before we can get licensed is the data logging and automation of the heating and cooling of the pasteuriser vat which Oli and Sam are busy nerding out on.
Then I make the call, get my Food Safety Plan signed off, have the factory and milking parlour inspected, make changes required, get licensed and start selling, well that’s the plan!
To begin with while milk is in small quantities and we are refining our systems we will be just selling bottled milk to patient friends and family, hopefully opening up to public sales in Spring. I will be selling through the farmers market for those who want ad hoc milk and for those more regular dairy consumers, sales will be via a CSA subscription model.
This will will require you to make an order via my Open Food Network online shop where you can choose your desired quantity and pick up location. When you begin, monthly prepayment will be required. To decrease the admin at my end this will increase to a 3 monthly payment once you’ve got a feel for the routine and how much you consume. If any of this is difficult to navigate or afford please contact me and I may be able to help. I want this to be as accessible as possible for people. If you would like to go onto the waiting list for orders, pop your name and email in the form below. I will keep you updated on when CSA subscriptions become available.
The other exciting, timely news will be the arrival of new calves. Daisybell is due today to be having her 6th and final calf, it will be her first pure jersey calf so I’ve got my fingers crossed for a heifer.
Olive, or boomba as she’s become known is having her first calf. Slightly overweight and 4 years old is not ideal to be having her first calf without problems, I’m watching like a hawk for any signs of milk fever or trouble calving, ready to jump in and assist if needed. Udders are bagging up, bellies are dropping, hips are widening and swags are slowing.
I can’t wait to start selling. Building took so much longer than planned but I must say it’s been so valuable to have this last year to focus on developing and improving herd and land systems, without which none of this is possible. Being slightly more confident in these areas I can now move some focus onto processing and customer systems.
As always, thanks for your patience! I can’t wait to share our liquid gold!
Our floor just went in. AHHHHH! Now it really feels like a factory! The list is definitely getting shorter, although I’m sure the list of still-to-do just keeps growing, hmmm. Install the doors, finish the little jobs such as door seals, install all equipment/sinks/benches, get equipment working, set up the refrigeration system for cold water storage, finish the hot water system, install solar hot water system, finish Food Safety Plan, GET LICENSED!
The big one we’ve been working on recently is the refrigeration systems. Oli wrote in a previous post about the reuse of refrigeration systems and the huge effect refrigerant gases have on exacerbating global warming. We’ve often mentioned Drawdown, an amazing research project proposing the 100 most effective ways to reduce global warming. Refrigerant Management is ranked as the #1 solution. When I first read this, with little knowledge of the subject, I imagined things like old fridges being dumped here in Australia or sent off to poorer countries who didn’t have the means of proper disposal. I certainly didn’t realise the extent to which poor disposal practices happens right here in Australia. We’ve heard so many stories recently of people, who certainly should know better, just cutting the pipes and releasing the gases and rubbish tips running over refrigerant system units with excavators instead of having the gas reclaimed for safe disposal. Everywhere in this country we are surrounded by refrigeration. Most homes, shops, offices and vehicles are equipped with one or more air conditioner, fridge or freezer. Almost all of which end up leaking their gases into the atmosphere due to poor maintenance and more often than not, don’t have the gas recovered when being decommissioned. Why? Mainly the cost of doing it and lack of awareness.
Then there is the practical element of how refrigeration effects our dairy. I’ll need a cool room, which we now have with a new refrigeration unit installed! woohoo! There is the chilling of the milk. Regulation requires that all raw milk be chilled and stored below 5°c within 3.5 hrs from the start of milking. Then, once pasteurised, the milk must once again be chilled and stored below 5°c. We are using a 200ltr jacketed vat for both the storing and pasteurising of the milk, which will then be bottled for fresh milk or transformed into yogurt. All these steps require a large amount (we’re aiming for 2300ltrs) of cold water (below 2°c) on hand. Another huge electricity user and refrigeration unit.
We’ve learnt many lessons on-the-job building this dairy. A big one was not having the old milk vats, which will store the cold process water, pressure tested before buying them. The first 2 we bought have leaks and wont hold refrigerant gas. We then set about finding some new ones, preferably with the refrigeration unit connected and operational, and this time taking our fridgy Graham with us!
This next part really stopped us in our tracks. We found an operational milk vat, 2 of them, with reconditioned compressors, and a new hot water service, hoses, heat exchanges, buckets, etc. We could have bought the whole dairy if we wanted. The dairy we bough from was being pulled apart as the dairy farmer had taken his life in January. Being in his dairy, hearing the stories of his life, young family, debt and death really hit us hard. Hearing about the training which milk tanker drivers receive as they are the ones who often find farmers in this situation was striking. I may have been angry in my last post but this just made it all too real, how common this story is…
It was difficult to feel positive about dairy farming on that farm, an old dairy farm which had been reconditioned and re-opened only 18 months ago. It will stay as a very strong reminder for us; every time we look at those vats. With the impending drought on our door step, how can we support those who grow our food to get through the hard times? What can we do differently? Hopefully paying out respects and sharing this story may help others to see the severity of this situation for many farming families.
So thank you all again for the generous support you have shown us. We will get there.
I grew up on a small hobby farm in North East Victoria. Thinking I was ‘to cool for the country’ I moved to Melbourne after high school where it didn’t take long before I found my passion in food politics and justice – access to quality food for all. I spent 8 years volunteering with Food not Bombs, working in and starting various food coops around the inner north and growing what I could in my backyard, but I knew my heart belonged to farming and set out to move back to the country and skill up.
Dairy became an obvious choice for me as I had to be working with animals and I wanted to see if it was possible to build a sustainable dairy industry.
Cost of food
I have always believed that access to nutritious food should not be a privilege reserved for the rich, however this should never come at the cost of someone else’s right to earn a living.
We are actually spending less on food now than we used to. Between 1960 and 2016 the percentage of income spent on food has dropped dramatically from 17% to 10% in America, Australia also sat at 10% in 2016.
What is food really worth? When shopping, we tend to make decisions based on a comparison, not absolute value assessment. Is this apple expensive compared to this other apple, rather than is this apple worth the price being asked.
There is one main factor which impacts the cost of food: the cost of labour. Care for people, care for animals and care for the land all take time. As produce gets cheaper, you can be sure that time invested in one, if not all, of these crucial elements has been sacrificed.
In the article mentioned above, they refer to a dairy farmer who calculated his hourly wage at $2.46. He was then quizzed by others how this was possible as they were making up to $10,000 loss a month! This is common across the agriculture industry. I would not think many are able to pay themselves minimum wage.
There are other factors at play here; farming has become industrialised, fewer and larger farmers, less owners and more staff, climate change, dependence on fossil fuel and environmentally problematic irrigation systems.
For most it’s become get big or get out, which always comes with a large infrastructure debt. However I also know that when humans get behind; financially, emotionally and physically, it becomes that much harder to ever get ahead. When your focus is on getting through the days, weeks, months ahead, it’s hard to think about the big picture of a more sustainable farming system which improves the land, animals and your life itself.
Agriculture may well be the biggest industry accelerating climate change and yet simultaneously represents some of the greatest opportunities to slow, and potentially reverse, the effects. I believe that if we are to support farmers to make changes on their farms which directly impact all our futures we need to start by valuing their work and not just financially.
Connection to food
Most of us humans don’t like to personally do wrong by people we know. It’s hard not to value food when you see how hard someone you know has worked to produce it. However the more we are disconnected from our food system, the more we make shopping choices based on what we feel like eating and price, without taking into consideration all the circumstances of people and land involved in the production. Participating in your food system gives value beyond a monetary exchange: regaining influence over how our land is managed, animals raised and ultimately the quality of the food you eat.
Quality vs quantity
This is a place I often come back to; why do we eat? Is it to nourish ourselves or to simply fill the space in our stomach? Unfortunately we live in a time where all apples are not created equal, our fruit and vegetables have seen “reliable declines in the amount of protein, calcium, phosphorus, iron, riboflavin (vitamin B2) and vitamin C over the past half century.” This is largely due to soil depletion and breeding for size, growth rate, pest resistance and appearance. Supporting a farming movement which values soil above all and the diversity of that which grows above and below the ground is positively helping to improve the nutrient density of your food. So like with most things, the better the quality, the less you actually need.
The fact that you are reading this post means I’m probably preaching to the converted but ScoMo’s words really hit hard at the heart of our broken food system. So I dare him to look Berta in the eyes and tell her a litre of her milk is worth less than a minute of his time. I look forward to her throwing her head in the air and walking away. It sure took hours of time for people to raise her, grow and harvest feed for her, milk her, build and provide all the equipment for milking and bottling milk to sell to our community.
Thanks again to everyone who has been patiently waiting. We are still hoping for a late May/June launch and expecting to be selling milk at the market/farm-shop for $4.50/L and and pre-order subscriptions for $4/L. I intend to publish my income and expenditure when up and running for everyone to see the true costs of running a small scale farming enterprise.
For a long time I have been dreaming about all the ins and outs of how this ‘future dairy’ is going to operate, when things are a long way off it’s easy to think big picture. Then we started building and milking, since then we mainly think about what needs doing today and this week. We’ve been heads down getting this business off the ground but this last week I’ve started thinking of the big picture again. We can see the light at the end of the tunnel. As the year begun Oli decided that on his Birthday in May he want’s to sit back with the factory licensed, all systems go. The idea of telling the world so he’s accountable is starting to make him a little nervous as time progresses, but I think he’ll make it.
So this blog I’m going to give a photo update on how we’ve progressed. I know many people are ready and waiting for the milk to flow, soon, I promise!
The Harcourt Organic Farming Co-op received RDV Victorian Government funding which is supporting our shared infrastructure project and paid for the shinny, new, 110,000l water tank. Currently the farm all runs off irrigation water so having access to clean tank water is a necessity for the dairy factory.
We were very grateful to have Brendan working with us at a crucial time after Oli’s accident to keep things moving along; putting up a wall on the shed for weather protection and the back lean-to for protection for all the process water systems.
We had Phil back on his excavator to finish off the greywater system and offer much needed help with the factory plumbing!
Jacques helped Oli installed the solar thermal panels on the cooler days. In a previous post Oli outlines the reasons behind using mainly second hand materials and some of the obstacles they pose.
When Oli cut and fitted all the dirty insulation(coolroom) panels, the inside of the processing factory became real. We both could finally feel what it will be like to stand in the room bottling milk! However using second hand insulation panels proved a nightmare, we are now experts in sanding and why certain specialist food grade paints are not appropriate for air spraying and why you should just hire an airless sprayer from the beginning.
Marty spent hours sanding the panels back to remove rust and marks. This panel was out of the shipping container wall where we installed the windows, Marty had to remove the many thick layers of paint from the external wall.
We then removed all the walls for painting. Then reinstalled them, being very careful not to scratch all the work we’d just done. Oli has now been installing all the coving, it’s feeling closer and closer now!
Rowan has been crafting the front entrance, with a team sanding back the doors from the tip to create our beautiful entrance!
I’ve been busy on the farm; fencing and learning just how hot the star picket rammer gets when left in the sun.
And my growing herd have been excitedly hoeing into the 4ths from Gung Hoe Growers and Tellurian Fruit Gardens. Farming in a diverse co-op is blooming marvelous!
Thank you to all these people and more who have been such an integral part of getting this business up and running. We’re getting so close now I can smell it! Thank you all for waiting patiently.
I’ve unintentionally created a positive feedback loop.
There’s many reasons for starting this business, a big one of them is that I love spending my time with animals, cows in particular. My experience has been that farming’s hard: long hours, extreme climate exposure, and often not for a huge amount of appreciation or money. But within that it can be the most magnificent, humbling experience. We experience death, but in hand life is exploding around us. I’m driven by the moments your breath becomes grounded; walking through the paddock at sunrise and noticing the days getting shorter, watching a storm roll in, watching animals interact and more than anything being part of those interactions.
However this is one of the ways in which I fear modern agriculture has missed the point. We’ve done everything we can to control and separate ourselves from nature. Spending time simply enjoying your animals company and the land you’re on is not a privilege many farmers can afford. The focus moves to trading commodities rather than nourishing ourselves and our communities through working the land.
I’m aiming to keep a small herd; maximum of 10 milkers. This combined with having a portable milking parlour means I need my herd to be very tame. My herd is not regularly coming into yards where I can treat them, move them or easily train them for milking. I need them to come when called, follow me when moving and be lead on a rope when managed as individual animals. None of this is possible if you have not built a relationship of trust with your animals. So here’s the positive feedback loop. Future Tessa with her future herd saves time and benefits greatly from simply hanging out with her herd now. Which in turn forces me to slow down, take the time to do this and enjoy the key reason for choosing this career over another; my cows!
Animals have been proven time and time again to work as therapy for people recovering from trauma. They respond to our energy. A milker whose angry will have a very different dairy to one whose calm; there will quite possibly be a lot more poo to clean up, lower milk and more kicks. Stressed animals don’t like giving you their milk, simple.
I met an incredible lady; Winnie, who told me that temperament was one of the most important factors when buying a cow for a small herd, one bad egg can ruin all your good work. Directly following this conversation I bought my first cow Berta and without her patience, life would have been a whole lot more difficult. The first time we turned on the milking machine, she came over, stood and waited.
I’m attempting to halter train all of the calves, some with success, others will take more work. Most of the cows I can now comfortably put a halter on in the paddock and lead them to where I need, which may be straight onto a trailer for a visit to the bull. Like all animals though, once you loose you’re confidence, it’s very hard to get it back. Once on a halter Olive is a dream to lead, but getting that halter on, near impossible! She has beaten me one too many times and knows my confidence has wavered. Her training for milking will have to begin long before she calves.
Sometimes it’s hard to step back and let lord of the flies play out amongst the herd; the hierarchy, the bullying, the sibling squabbles. But then when you finally see the new cow being accepted and groomed by Queen Berta it can’t help but warm your heart from a distance.
After writing this post I spent a few days partaking in the familiar practice of crying over ones electric fencing. Summer in central Victoria leaves our ground bone dry. What was granite porridge in winter returns to concrete every summer. Putting portable electric fence post in results in many bent posts and with no moisture left in the ground the 2 live wires I’d been using no longer earth effectively. The heifers realised this before me of course. A live wire with good voltage no longer gives the slightest shock when earthed through the animal to the ground. So with no permanent fencing enclosure on the property we set out in the heat to build an electric fortress with live and earth wires. If we wanted to go home at night we had to re-train the heifers who were walking directly through the fence, wondering why we put rope in their way and heading directly for the orchard! We’ve been 3 days without a breakout now. Through all of this I’ve been so grateful for the halter training, while building the fence the only option was to have them tied to a tree in the shade with food and water and they were fine with this.
I am understanding the need for at least one permanent enclosure, boundary fences and earth wires within all my fencing systems. Fencing systems can very quickly dominate your day and leave you feeling like you’re just treading water (although lack of water is the problem). Trying to establish secure fencing systems by next summer is a must.
A key component to Sellar Farmhouse Creamery is to develop and manage silvopasture landscapes; an integrated system where trees and pasture are managed to raise livestock. This park-land system has always existed naturally where herbivorous range and under the management of humans is an ancient practice. With examples around the world such as the Dehesa in Spain.
Diversity is something which is lacking in the modern agriculture industry. For efficiency sake, we have moved towards large mono-cultures: why try and manage 10 different farming enterprises when you could just manage one. The problem with this is that it’s contrary to how nature works. Nature never puts all her eggs in one basket, so to speak.
Take our recent rain for example. Getting rain now is great for veggie growers such as Gung Hoe Growers here, but not so good for my lucerne hay grower who has had to turn all his hay into silage as it won’t have time to dry. Rain is always appreciated on this dry continent, but every time it rains it’s of benefit to one farming system and may destroy another. If you only have one farming system, you’re left particularly vulnerable to weather. Having diverse farming systems helps to build a resilient farming business. Enterprises such as livestock, forestry, nuts, fruit, mushrooms etc can all generate income from the same area of land in a silvopasture system.
Nature’s balance also depends on diversity. Many of our pest and diseases tip into a problem when they have access to feast on their favourite food, all laid out paddock after paddock with no predators to stop them. Having a diversity of plant heights, growth seasons, seeding seasons and palatability, builds mutually beneficial relationships. These increase the resilience of the vegetative cover in general to pests, diseases and fire and climatic extremes.
Ruminants, like humans are healthiest when living off a diverse diet. To be able to receive the full spectrum of vitamins, minerals, fats, proteins, carbohydrates etc from just a few feed products is near impossible. Supplementation is needed and in many industrial systems it leads to a short life. Cows are natural grazers, unlike their ruminant friend; the browsing goat, who does very well on fibrous trees and shrubs. A well managed, diverse pasture is a great thing for cows to have as their main feed source. However having access to trees and shrubs which have higher mineral contents in very important.
Cows fed mainly tree fodder may struggle to maintain condition. The high fiber and lignin content make for lower digestibility and energy conversion than grasses. However in dry seasons tree fodder can supplement protein and other nutrients to dry pasture. In Central Victoria this is crucial for our hot dry summers.
On a large pasture based system, tree fodder can be difficult to manage. Whether as self feeding; where animals graze directly from trees, often damaging the trees, or human cut-and-carry, both models can be labour intensive to feed a large mob of animals. Developing full property integrated systems take time to establish but have multiple benefits. Working at our scale of the planned herd of 10 milkers, this is very achievable.
When we first bought Berta, our queen cow, and tried to feed her willow she looked at us with disgust: ‘what am I meant to do with this?’ Having grown up on a conventional dairy the idea of eating trees was completely foreign to her. However once Daisy and Millie arrived, she watched them eat willow 2 days in a row, then on the third day she tried it, and since then she has been first in line to get to the willow pile.
According to the fantastic research project Drawdown: ‘the most comprehensive plan ever to reverse global warming’, Silvopasture is ranked #9 in the top 100 solutions to reversing global warming.
‘Research suggests silvopasture far outpaces any grassland technique for counteracting the methane emissions of livestock and sequestering carbon under-hoof. Pastures strewn or crisscrossed with trees sequester five to ten times as much carbon as those of the same size that are treeless, storing it in both biomass and soil.
Silvopasture averts and sequesters emissions, while protecting against changes that are now inevitable.’
We can also see more tangible effects of managing silvopasture; Shelter for animals, landscape stability by decreasing erosion from wind and water, increasing the cycling of water and nutrients and reducing requirements for cultivation.
On the farm
Here at the farm we are lucky to be riding on the back of existing systems. Currently the cows are grazing in the old plum block. This orchard is being removed as it’s no longer productive for the orcharding business. Rather than cut and burn the stored carbon and nutrients the cows have been absolutely demolishing the trees: very glad we didn’t experiment on the commercial orchard when in leaf! We will be pollarding the old plums to hopefully harvest new growth for years to come. With the arrival of fruit fly to the area managing wild fruit trees is crucial to the organic orchard.
When the orchard trees have no green growth we have had good success with grazing the cows between the fruit tree rows, mowing the grass and taking advantage of the soil which is already well watered and re-mineralised. In the future I’d love to find a system for cutting hay between the rows when the trees are green; the grass needs keeping low for the fruit season but the cows cannot graze in there.
We’ve been planting trees for future resilience. Salix Babylonica (weeping willow) below the leaky dam; the first and last of the willows to have leaves for the season, long soft branches making most of the biomass palatable (greater leaf to wood ratio), very easy to harvest, does not easily spread like its relative, crack willow, and the cows just devour it.
Black wattle is also a favourite among the cows. It’s high tannin content makes it not appropriate as a primary feed, but as a supplementary feed it’s high in protein and has compounds creating an anthelmintic effect; helping to maintain a healthy worm balance. Oak and tagasaste are among some of the other trees we are planning to plant with the intention of fodder harvesting in the future.
This is also a key benefit to the farming co-op model which we have here at Harcourt. Bringing together the old practice of diverse farming enterprises interacting on the one farm, whilst using the modern efficiency of specialisation.
Silvopasture is a long term investment, we may never reap the full rewards of the work on this leased land. But leaving it in an improved, more resilient state than we found it is a founding block for this business.
Modern dairy tends to involve rather complex engineering and use lots of energy. A micro dairy is not necessarily much less complicated. I am trying to creatively (re)use available materials and renewable energy to help Sellar Dairy move toward a vision of sustainable and regenerative farming.
Energy is everywhere in all imaginable forms. Our modern way of life uses lots and lots of it. Some forms of energy, like oil and coal are particularly useful to us, more so than the same amount of energy in, say, heat.
Much of the way of life we take for granted is based on massive reserves of fossil fuels. These resources have been found in such large quantities that we have been able to build a huge civilisation based on them.
Between the growing awareness of resource limits and climate change, a movement to find alternative ways to live is rapidly gathering momentum.
Food production in our modern world is at the edge of both energy and climate. Farms, on the whole, use a lot of energy and rely on stable and predictable climate.
About a century ago, more than 2000 calories of food were produced for every calorie of fossil energy used in US broad-acre agriculture. These days that is reversed! Yes, more than 2000 calories of fossil energy are used to produce each calorie of food.
Despite the resource limits we face, the abundance of cheap and useful energy from the last century has lead to a huge amount of discarded resources. Making things from available materials, or Obtanium Engineering, is one of the best ways to make the energy, already invested(embodied energy), go further.
Obtainium Engineering Farming
To be a farmer is to be a Jack-of-all-Trades. It is not uncommon to find some ingenious use of available material on farms. Its common place on farms to maintain equipment and creatively use available materials. I am certainly not alone as a farming Obtanium engineer. It seems to me that the “quality” of Obtanium in rural and farming areas tends to be lower for at least two reasons. Firstly, these folks tend to be less wasteful in the first place and secondly tend to reuse waste more effectively.
Being closer to centres of population, wealth, industry and big business seems to “improve” the quality of Obtanium. Obviously this means more is being wasted in these areas. Our culture needs to learn to waste less. But in the mean time we need lots more Obtanium Engineers to salvage these fantastic resources.
Obtanium is not as reliable or predictable as new materials by its very nature, requiring a greater degree of flexibility, innovative design and some times some inefficiencies. For many people efficiency is one of the keys to sustainability but its really only part of the picture. Here lies the Prius problem. We need to also consider the amount of energy to make new tools, not only their operating cost. Sometimes the total energy used is less to continue to operate older equipment than replace it with newer, higher efficiency, equipment.
Reuse of materials isn’t always easy, often taking longer and potentially sacrificing some degree of reliability or consistency. This makes redundancy and serviceability important design requirements. Obtanium engineering is a slow way. Perhaps it can be thought of a bit like Slow Food.
For the last year I have been sourcing materials, designing and construction the various components of Sellar Dairy.
I have discovered that the more technically demanding the system being designed, the more challenging it is to reuse materials as its particularly difficult to know the exact specifications and capabilities of second hand equipment in order to do the necessary calculations to ensure the components of the system will function correctly together. For this reason, industry tends to be incredibly wasteful, throwing away(recycling) huge amounts of perfectly functional equipment. A functioning machine that is melted down for scrap is a huge waste of all the energy it took to make it compared to reusing it.
Our Design, Engineering & Reuse
This is a somewhat flexible process that adapts to the available materials as they are sourced. Below are a few snap shots of the evolving designs for some of elements of Sellar Dairy and examples of the wins, losses and challenges in reuse.
We had done some initial designs sufficient to decide on a 40′ insulated shipping container as the base for the moveable Sellar Dairy factory.
The floor of the container wasn’t all even as it had suffered some damage from years of use carrying heavy cargo. To accomodate for the damaged to the floor in one corner I had to create tapered supports to carry the ply flooring substrate.
The heart of the dairy is the pasteurisation vat, both in an engineering and energy use sense. Tess had a relatively good idea what she needed in size and found a good candidate early on.
The energy required for the vat to heat, for pasteurisation, and cool, for storage, is significant. The systems required to do this heating and cooling are complex.
Heating and Cooling Design
Electricity is a very high grade energy. Its able to do almost everything we need, including make heat. But its a huge waste to degrade electricity to heat. Heat is one of the most abundant forms of energy around us and its much harder to turn it into electricity than visa versa. Solar thermal is much more efficient and lower tech than solar photovoltaic for creating heat. We will use solar thermal panels to provide much of our heat needs through the hotter months.
I have refurbished damaged panels destined to be scrapped.
Refrigeration and cooling systems are one of the biggest contributors to climate change(see Drawdown). I have been particularly keen to ensure our impacts from our cooling needs are as low as possible. We are recovering many parts from the large old, leaking and failing refrigeration system from the two refrigerated containers we have. We(HOFC) got a second one as part of the infrastructure for the hub(our co-op shared facilities).
The 8 kg of R-134a refrigerant gas from the two refrigeration units is equivalent to about 11,440kg of CO2 in terms of its greenhouse effect on the atmosphere.
The average Australian travels a bit over 11,000km/year. In a car that uses about 7.5L/100km this would equate to about 2.41 tons of CO2 emissions(ref). So the refrigerant gas from our two containers, if released, is something like 4.7 years of driving for the average person! Eeek.
We had the refrigerant gas professionally recovered by Graeme Ellis and will use it in the system we are rebuilding. Greame has been great in working with us on this journey of reuse.
I have recovered the compressors out of the systems.
Almost everything seems to make waste heat. Particularly lots of industrial processes. We are able to capture some of this waste heat. Our refrigeration compressor will produces lots of waste heat(more than 10kw). By retrofitting water cooling onto our compressor we can make it more efficient. Also we are able to run the hot water through a heat exchanger to recover(into our hot water system) some of this waste heat.
The systems require lots of pumps for all that heating and cooling.
So many pumps get scrapped that just need a service. I have recovered lots of pumps from the scrap metal that just need new bearings and seals. And then there are the ones that are still perfectly functional without any servicing too. Even brand new stuff makes it into the scrap!
We’ve found old 3000L milk refrigeration vats second hand to store our cold process water for chilling the milk vat.
These are a good illustration that reuse is not always predictable or easy. When Graeme Ellis tested the refrigeration coils, he discovered that only one of the two vats was useable. The second was leaking badly and upon closer inspection failed repairs were visible. We actually only need one. Its often necessary to get more than you are expecting to use when engineering from obtanium.
The design for the hot water storage has been adapted around these 4 415L hot water cylinders from our own local second hand materials business, the Salvage Yard. A fantastic business that support these values of reuse.
Perhaps we can think of Obtanium Engineering as an effort to improve embodied energy efficiency. Really just getting the most out of what we already have.
This post has primarily focused on reusing energy already stored in stuff(embodied energy). The other side of the coin is also the dynamic energy that we use to run the systems. In a future chapter I will go into more detail about the energy usage and production side of the dairy.
I would like to end with a sneak peak into an exciting and innovative renewable energy system we are looking to demonstrate. Like most things innovative, nothing is certain but the system is showing great promise.
Thanks for your support and interest in Sellar Dairy.
In an average Australian year, 24% of work place fatalities happen within the agriculture sector. With less than 3% of the population working within farming this makes us 8 times more likely to die at work than any other industry.
Farming is a dangerous career choice. From working with dangerous machinery to working with animals and nature, everyday we partake in activities which could change our life for ever. Sure, other industries have risky practices, but farming as an industry has been pushed to a desperate place. Often people are working alone and so if things go wrong there is no help at hand. Always farmers are pushed for time and resources which means equipment is often not maintained, corners are cut, people get complacent as the ‘job just needs doing now! We’ll worry about fixing it later’. Then to top it off the work of farmers is way under valued by our current society, there’s no heroism in ‘thanks for giving your body and soul so that we can eat’.
I’ve had the benefit of coming from a workplace where OHS is taken very seriously. Oli is known for being a rare breed when it comes to safety gear and protocol when riding motorbikes, forestry and hunting. Yet with all this risk assessment framework in mind, we too fell victim to ‘just get the job done’. Since starting to farm we’ve had a few near misses, learnt some cheap lessons until we were forced recently to slow down.
Things have been stressful, trying to get this factory built so we can start selling dairy. Building always seem to take longer than you think. But this particular Saturday, 5 weeks ago, wasn’t such a stressful day. We were just moving the water cart after having filled it. There were a few factors in the lead up.
The 1968 Toyota stout (Bert) that we usually use for towing the water cart was in use for moving the milking parlour so I was using our registered 1978 Toyota Stout (Vera).
The tray hangs out over the toe hitch which makes connecting and disconnecting trailers awkward at the best of times.
We then connect the 1500ltr single axel water cart.
The grass was very wet so the road tyres on Vera were struggling to get traction, frustration builds. We managed to get the trailer moved but parked on a slight backward slope. Now here’s the worst part; we knew our hands were at risk. Oli stopped me from pulling the tow hitch up. We stood back and thought about it. ‘Well at least put your hand under, not over, so if it does jump up you wont get crushed’.
Then next thing I knew Oli had jumped back, screaming ‘F*#k! I’ve cut my finger off’.
The trailer hitch had jumped up against the tray of the ute with such force and taken the end of Oli’s middle right finger clean off.
Over the next 48 hrs we had many thoughts regarding the medical system in Australia. But in this first period we were so grateful we have access to Castlemaine Hospital and its facilities. Within 20min of the event we were with a Dr having it cleaned and the surgeon organised in Bendigo.
Arriving in Bendigo was a slightly different story. We saw how lucky we are in Australia to have such high level public health care. But even with this, on a Saturday afternoon in a regional hospital, on the night of ‘white night’ the number of high level staff available meant that when Oli finally got into surgery at 1pm the next day they had to remove more of his finger than he did on the trailer.
Coming to terms with it has been the hardest part. This finger has healed remarkably; the body is an amazing thing.
But the physical lose of the end of his finger and realising that our own completely avoidable actions caused this has been hard.
We’re taking safety very serious now. When that part of your brain says don’t do it, we’re listening. When we think ‘I’ll just do it this time and then fix it’, we fix it now. The hardest part is going to be maintaining this into the future. When the finger becomes normalised and the trauma fades, how do we remember that short cuts are rarely short and the risks are not worth it. Our bodies are all we have and they’re bloody good to us! We hope our story helps others make better decisions next time they do something risky.
Time is the only thing we can never change, if we could we would go back and do many things differently.
Taking more care to look after the land, our animals and our selves takes longer.
This injury has highlighted for us that caring for our selves is just another facet of moving toward a more sustainable agriculture. We are really grateful to everyone supporting this movement.
A big, exciting project which has been going on here in Harcourt is the grooming of the picnic gully block. Katie and Hugh bought the 5ha block a few years back, which unfortunately from a grazing perspective, was way over our heads in gorse, briar rose, wild plums and black berries. As Oli’s dad said, great property for goats!
To see the ground we’re working with Katie and Hugh got in David with his groomer. A mother of a machine, we watched him reduced 2m shrub to a beautiful ground mulch with just two passes.
There are many opinions on how to manage these plants and their regrowth. Many have tried, many have failed, different combinations at different times. One thing I know is that these plants are colonisers,; full of minerals and organic matter which we need so desperately on our soils here. A friend who’d done many experiments managing gorse said it doesn’t matter what you do, if you have the grazing pressure of wallabies, nothing will ever get ahead to out compete the gorse.
So with years of work ahead we are taking the path of managed grazing. We’ve been busy hand broadcasting seed, many perennials, hoping they will take advantage of the coming Spring and the rich organic matter which is currently decomposing. Once established, we will use the cows to strip graze, followed directly by slashing any regrowth the cows missed.
Next winter we are hoping to get a large tree belt planted down the gully. This will help to stop erosion while taking advantage of any moisture to grow more tree fodder for our ladies.
The second major event that is happening is the breeding of our herd. This was going to be a simple trailer trip to the bull and 9 months later hey presto, calf. Not so, we’ve had a few unsuccessful dates with the bull and the embarrassing problem of not being able to catch Olive when she was on heat. However, another story of a ridiculously generous farmer; our patient neighbour has visited for AI and is now teaching me how to do it. This is certainly not as easy as he makes it look! I plan to always use natural mating where I can, but the convenience and genetic options of AI has it’s advantages.
As spring has sprung I eagerly watch as the grass grows and the days warm up.
Now that the milk is flowing, we’ve been busy trying to get the creamery up and running. Then we can get licensed to start selling and sharing this beautiful milk!
We started off with a bare bit of land next to the existing packing shed. The main issue with the site being the large granite bolder. However, this is not a problem for us as we want the factory raised so we can access all the plumbing! Thanks to Phil and his trusty plumbers excavator, we got the site cleared up and ready for the container to be delivered. We learnt that all granite is not created equal!
After a day trekking through container yards in Melbourne we found our perfect factory. Refrigerated containers; Reefers, are not so easy to come by these days, particularly ones which aren’t being decommissioned because of the extensive damage by forklifts, so when we found this one it was an easy decision. Easy was not the word I’d use for getting it delivered and in place though. I think the truck drivers words went something like ‘it can’t be done, where else can I put it’, but we persisted.
We then had a big blue box, which very quickly become home to all the tools and equipment we needed up at Harcourt. We had Morgan connect the power and then there was light!
With the skilled and daring team of Dave, Christian, Jacques and Rowan, Oli set to constructing the roof over the container. While we currently dread the idea of it, the design of the factory is to be portable. If for one reason or another we are to move the business to another property, the whole thing can be disassembled and come with us. Avoiding being locked into costly, permanent infrastructure and the need to buy land is at the core of this business model.
We purchased second hand trusses which had come off industrial greenhouses which took a special kind of engineering to erect.
However getting the pre-rolled 8.5m long sheets of tin on was testing on minds and bodies.
Building an airplane hanger? you say. No, this is our stylish shed. Providing protection for our equipment and container as well as a large amounts of storage space.
At last Rowan and Oli installed the windows and cleared the deck ready to lay the floor. No longer a daunting big box. It already feels like a factory with a view.
As I will say time and time again, none of this would be possible without all overwhelming hours of work and support which people have given us. My partner Oli in particular has had his life hijacked by this project. He is the building/engineer extraordinaire. At least there’s good food, good views, good people and spectacular cows to keep him coming to work!
And of course, my lovely ladies! We’ve had nervous times experimenting with them grazing in the orchard. Olive took a trip to the bull (what a way to spend a Sunday afternoon). Daisy, who was meant to be pregnant told us loud and clear that she’s not. The calves get bigger by the day and the worry about feed security in the current and future season is a constant on the mind.