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Owen Scott
Owen Scott

Farm Master Pasteurizer Manually

Our pasteurizers have a range of capacities, from 3-7 gallons (14 to 29 liters), making them perfect for home or micro dairy farm use. If you are in need of something larger - say 13-26 gallons (45 to 90 liters) - please contact us and we'll happily check its availability!

Farm Master Pasteurizer Manually

This page demonstrates how we built our own low pressure steam boiler and autoclave for sterilizing mushroom substrates on our farm. It's shown in two versions. The first version shown below must be filled with water and regulated manually. This is what we started with because of our limited budget at the time. The manual version can be built for $300 or so, and much of that cost is for the valves and fittings you'll need from your local hardware store. The most expensive part was the burner assembly itself, at $130.

This section takes off where the manually operated system described above ends. We used the original manually operated boiler for over a year as we brought our mushroom farm up to full production. The winter of 2010-2011 convinced me that I had to come up with a different approach. We regularly get down to -30F in the winter here, and trying to stretch a water hose from the faucet on our cabin out to the boiler twice a day to fill it, proved so tiring that we almost gave up and quit. Here's why: Our boiler is not just for sterilizing substrates, but also is used to heat the incoming air to our mushroom farm. Since a mushroom farm needs a 24/7 fresh air supply, even a short time pumping -30F air into the underground growing areas would be a disaster, and would wipe out everything within. If you put ice cold water too fast into a boiler at pressure, it will cause what's known as shock cooling and be destroyed. Steam expands up to 1000 times the size of the water it came from. Therefore, if you simply run a cold water hose to your pressurized boiler and open it up, the steam will instantly turn back to water, causing a vacuum to develop in the boiler itself. Picture your 55 gallon barrel boiler as a beer or soda pop can that you squeeze in your hands-it's not a pretty sight.

We've found that 39.3% of dairy farmers have earned a bachelor's degree. Furthermore, 4.6% earned their master's degrees before becoming a dairy farmer. While it's true that some dairy farmers have a college degree, it's generally possible to become one with only a high school degree. In fact, one out of every four dairy farmers did not spend the extra money to attend college. 350c69d7ab


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