By Justin Gardner Solar CITIES open-source design for a remarkable system that turns all food waste into natural gas and liquid fertilizer. According to the tutorial, you’ll never have to buy fertilizer again. The gas is piped to a stove for cooking.
The system is a form of biomimicry, essentially recreating an animal’s digestive system. The “stomach” is a 1,000 liter plastic international bulk container (IBC), with three pipes inserted into the top—one for feeding, one for gas outlet and one for liquid effluence.
Every time you add material into the “plug-flow digestor design,” which optimizes hydraulic retention time (the amount of time things are …read more
Source:: http://thefreethoughtproject.com/diy-biogas-system-turns-food-waste-fertilizer-gas-cooking/