Showing posts with label Black Soldier Fly. Show all posts
Showing posts with label Black Soldier Fly. Show all posts

Saturday, February 20, 2016

Black Soldier Fly Larvae


I've written about our challenges in dealing with food waste around here. We've tried freezing the food and taking it to the dump periodically and we've tried fermenting the food in a bokashi compost bin (more on that later). Neither of these have worked well for us. Food in the dump isn't good for a number of reasons and we had problems managing the bokashi... most of the time it was just plain gross. Then I learned about the black soldier fly (hermetic illucens).


Black Soldier Flies can be found throughout most of the United States. They are very interesting animals. They spend the bulk of their lives in the larval stage. Then, they lose their digestive system and crawl off to pupate. They emerge as black soldier flies and at that point, their sole purpose in life is to reproduce.

Since they no longer have a digestive system, the flies are no longer interested in food. They will not buzz your food, land on it or carry disease. They lay their eggs near rotting things and the cycle begins all over.
We can use this cycle to deal with our food waste AND turn that waste into chicken and fish food. Last year I purchased the Biopod at a conference. The Biopod is a black soldier fly (BSF) composted. Food scraps, and other waste goes in and BSF grubs come out. In addition, for every 100 pounds of scraps that go into the Biopod, 5 pounds of good compost come out.

We started the Biopod in March with feed corn soaked in water. After a few days, it had started fermenting. Within two weeks we had our first brood of grubs. They devoured everything we fed them! Within a few weeks of starting the Biopod, we were harvesting a regular supply of grubs. The chickens loved it! I loved it! We were turning our food scraps into health chickens and eggs.



Here's our stock of BSF larvae. They add up quickly!


 This is a rotisserie chicken I found in the very back of the freezer. I figured that after sitting three years in the freezer, it would make better food for them than for us. This is how the chicken looked the morning I put it in the BioPod.

This is later in the afternoon. The hungry BSF grubs are doing their work!


The next day, the chicken is completely gone - except for the bones. 


Wednesday, September 24, 2014

Conservation of Mass

One of the most profound things I learned in school was during my 8th grade Physical Science class and it has remained with me over the years. The Law of Conservation of Mass states (very roughly) that in a closed system, the mass of that system will remain constant over time.  The implication of this law is that matter can neither be created nor destroyed. It is simply reordered through a series of chemical reactions.

At a practical level this has huge implications. In the natural world, trees lose their leaves every year and those leaves enrich the soil for other plants. Plants turn energy and nutrients into plants, small animals eat the plants and turn them into energy, waste (which enriches the soil) and animal. Predators eat the small animals and turn them into energy, waste (again, enriching the soil) and predator. When the predators die, bacteria decompose the body and turn it back into free energy and its component parts again making it available for the plants. It's a brutal, yet elegant system. There is no waste. Everything is recycled and becomes nutrients for something else.

Consider this... If I bag all my grass clippings and take them to the dump, I am removing matter from my property and placing it in a landfill where it will eventually decompose, creating waste greenhouse gasses and leftovers. If I rake up and burn my leaves every fall I am using a chemical reaction to oxidize the leaves. The components of those leaves are not gone. The ashes represent what remains of the leaves on my property but the bulk of them were changed into hot gasses that were released into the atmosphere. In both cases, I am removing potentially useful matter from my property and creating waste rather than using it for my benefit. Likewise, when I drive my car to take the grass clippings to the dump, I am using the gasoline to produce energy to move my car by burning it. The gasoline is not gone, though. It is simply changed into heat and energy with the by products released into the atmosphere though the tail pipe in the form of waste gasses and water vapor.

Barry Commoner, a prominent biologist, ecologist author and former presidential candidate who passed away in 2012, wrote the book, The Closing Circle. In this book he draws on the Law of Conservation of Mass when he set forth his four laws of ecology. They are:
1. Everything is connected to everything else. There is one ecosphere for all living organisms and what affects one, affects all. 
2. Everything must go somewhere. There is no "waste" in nature and there is no "away" to which things can be thrown.
3. Nature knows best. Humankind has fashioned technology to improve upon nature, but such change in a natural system is likely to be detrimental to that system"
4. There is no such thing as a free lunch. Exploitation of nature will inevitably involve the conversion of resources from useful to useless forms.
Commoner's four laws are so obvious, yet so easy to overlook that it's scary. We are all interconnected - in so many ways. This is not just a World of nations, We are a planet of people and other species with a shared future. Landfill space is becoming scarce and nobody wants one in their back yard. We have developed farming methods that deplete and poison the soil for the microorganisms that live in it while the run off is polluting our rivers and oceans.

Finally, Law #4 is probably the most profound to me. We continue to use our resources faster than they can be replenished. We burn them, use them, break them down into their component parts, mix them together so their not recyclable and then throw them into the landfill where they sit forever, never to be seen again. One day those resources will be gone.

One of the best things we can do for our planet and everyone/thing on it is work to eliminate waste and/or harness it to our benefit. That's where the three R's come into play.

Reduce - Cut back on the stuff we use. Reduce trash, reduce stuff, reduce size, cut waste, or find more efficient ways of doing things.

Reuse - Find other purposes for things that are no longer needed or wanted OR find someone who wants it when you're done rather than sending it to the landfill

Recycle - Cut the amount of resources that go into a dump never to be seen again. Recycle waste food into useable food for other things and compost. Maximize your recycling program at home and work.

These are some of the things that drive our thinking here at Red Clay Farm. We try to find ways of keeping our organic material here on the farm and using it to our benefit rather than sending it to decompose in the landfill. We also work to reduce our waste as much as possible. Here are some of the ways we do that.

Animal Manure - This is composed of grass from our pastures, hay and feed that we have brought in to our farm. It is gathered routinely and composed with straw, leaves or grass clippings. We use it to spread back on the fields to enrich our soils. This way, we get more benefit from the money we spend on hay and feed. Not only does it go to keep the animals alive, but what is not useful to the animals is useful to the grass, and the microorganisms living in the soil.

Left-over human food - We make every effort to not send food scraps to the dump as well. vegetable matter gets put in the compost pile. Meats, fats and other non-compostable items get fed to our Black Soldier Fly Larvae (more on these in a later post). These guys make short work of any table scraps and, in turn, provide a tasty supplement to our chickens and, eventually, our aquaponics fish (our vegetarian tilapia don't like them). In this way we are turning our food scraps into chickens and eggs.

Paper, cardboard, etc - These items are shredded and used for various things such as worm bedding, chicken coop bedding and composting. We use broken-down cardboard boxes for sheet composting in the garden.

Recyclables - Our county recycles plastics, aluminum and glass so we make sure we support these programs.

Water - We live on a gentle slope that starts at the top of the property and runs towards the back of the property toward a creek. The contour of the property naturally channels rain water down the middle of the property. We are now developing a plan to try to stem the flow of water off of our property and keep as much of it as we can. Additionally, we are installing rain barrels at the gutter down spouts to keep that water as well.

Usable stuff - Items that we no longer want or need are donated to the local Habitat for Humanity Re-Store and to Goodwill.

We still have a long way to go, but we've started. Anything that we can use to enhance or enrich our farm stays on the farm. Anything that can be recycled in some way or another is. In this way we have greatly reduced the amount of trash we send to the land fill.

Hopefully this is not too long and manifesto-sounding. The long and the short of it is we can't just throw things away because there really isn't an "away" these days. All we need are a basic understanding of the natural laws of the world, some integrated solutions based on that understanding, and a willingness to make the changes in our lifestyle to implement those solutions and we can begin to make huge changes in the way we affect the Earth.

Saturday, March 29, 2014

The SC Organic Growing Conference

Earlier this month I attended the SC Organic Growing Conference in Greenville, SC. The one-day conference was sponsored by the South Carolina Organization for Organic Living (SCOOL) and covered a wide variety of subjects. I wanted to attend all of the classes, but sadly, I could only choose four.

I attended the Vermiculture class, a Beginning Bee-Keeping class, a Black Soldier Fly (BSF) Larvae class and a Aquaponics class. All were very informative and instructional. I am now motivated to jump into some new experiments and make some adjustments to some old ones!

Vermiculture Class - Paul Coleman of EarlyBird Farm in Hodges, SC gave a great class on vermiculture (vermiculture being the raising of worms. Not to be confused with vermicomposting; the use of worms to produce worm castings). He covered the basics of worm farming and showed pictures of his vermiculture operations. He also showed the class how to make a home-made worm bin out of a rubbermaid tote and filled it with a half pound of Belgian Red Worms. He then drew names to take the bin and worms home. I was the lucky winner - Wooo Hooo!

The beginning bee-keeping class was very informational. The lady who gave that class was working towards earning her Master Bee Keeper's certification. I learned a lot about bee keeping in that 90 minutes but I'm sure we only scratched the surface. Just a week prior to this class I had just ordered a beginning bee keeping kit. This class got me excited to get going on the bees. More to follow on that in a later post.

Black Soldier Fly Larvae Class - OK. Maggots can be just plain gross, but these guys are amazing. Watch this 22 hour time-lapse video. The black soldier fly is an insect that is prevalent across the US but especially in the Southeast. They spend the bulk of their life cycle in their larval form and are voracious eaters as they grow. When they're ready to turn into the black soldier fly they lose their digestive system and crawl off to find a quiet area to pupate. As an adult fly, their sole purpose in life is to mate and they die shortly thereafter. Black soldier fly larvae convert food waste into usable protein that can be fed to chickens or fish as a food supplement.

Aquaponics - This class was focused on how to build and operate an aquaponics operations. I learned that I was doing somethings improperly with the IBC system I set up last year so this year I will make some tweaks that will hopefully give us better results.

The organic growing conference was a great opportunity to learn and meet people. Best part of it was learning that I was not the only crazy person in the world interested in this stuff. There are a bunch of us out there!