This is one of the easiest ways I know of to create a closed-circle system: grow some food, cook it, and get excellent liquid fertilizer to grow more food! How simple is that? Get yourselves one of these HomeBiogas systems, and you are on the path to a zero-waste lifestyle. Not only that, but you get free cooking gas (methane), as well.
You can put up to 6 litres of food scraps and pet waste per day in the system. It will create enough gas to cook a good meal.
Assembled HomeBiogas System
HomeBiogas Kit
