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Why Build a Biodigester?

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https://i.pinimg.com/originals/05/25/2d/05252d72b4833256f6a8b03f7a5535db.jpg A biodigester converts food waste into methane gas, which can be burned for energy, and compost, which can be spread on gardens to make the soil more fertile. Every year, roughly one third of all food produced goes to waste, equating to some 1.3 billion tonnes. As a result of the energy that goes into overall food production, food waste is a significant driver of climate change, which cuts to the heart of the problem. Not only is food waste impactful on the environment, it is preventable, since biodigesters can be used to convert food waste into fuel and fertilizer. There is a global shift from rural to city living and, as urban development expands, there is less room for composting to return organic waste to the land. These energy-valuable food scraps and other organic residuals are thrown into the landfill where they decompose into concentrated effluent that increases
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Step-By-Step Instructions

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Method: → Biodigester Assembly Using a wireless drill and the appropriate hole saw bits (5” and 3”), create three holes at the top surface of the rain barrel; one 5” hole (for the feed pipe) and two 3” holes (for the gas pipe and effluent pipe). Arrange the holes in a straight line across the center of the top surface; the gas pipe will be in between the feed and effluent pipes. Always wear leather gloves and safety glasses when using the hole saw. Add silicone caulking to the lip of both the 4” and 2” uniseals and fit them into the appropriate holes. Leave to dry overnight. Unscrew the nut and remove the washer from the 2” bulkhead fitting; add silicone caulking to the bottom lip of the body and replace the washer; reach through the adjacent 4” feed pipe hole to push the bulkhead fitting from the underside of the barrel surface and up through the central gas pipe hole; screw on the bulkhead nut and tighten. Leave to dry overnight. Using a handsaw, cut a 2” PVC pipe s
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Tools and Materials Needed

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Materials 55 Gallon Rain Barrel 1/2" PVC Schedule 40 Pipe 2" PVC Piping - 42" Length 4" PVC Piping 2" PVC "T" Adapter 2" PVC "L" Adapter 2" PVC Coupling Socket 2” to 1 ½” Bushing 1 ½” to ½” Bushing ½” PVC Ball Valve 2" Bulkhead Fitting ½” PVC Slip-to-Thread Adapter ½” Hose Barb 4” Rubber Funnel Metal Hose Faucet Digester Floaters Biogas Collection Chamber (i.e. inner tube) Adhesives Plumber's Tape Silicone Caulking 4" and 2" Uniseals Black Paint Tools Handsaw Wireless Drill Drill Bits 4" and 2" Hole Saw Bits Personal Protection Equipment Leather Gloves Safety Glasses
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