FIELD: chemistry.
SUBSTANCE: methane tank has a sealed reservoir with a top and a bottom. Inside the reservoir, there is an inner and an outer fermentation chamber, pipes for feeding liquefied organic wastes, outlet of the fermented mass, and pipes for outlet of biogas. The inner chamber is insulated from the outer chamber and lies coaxially inside it on supports which are connected to the bottom of the reservoir. The inner chamber is linked to the outer chamber through a system of pipes connected to a separator. The system of pipes consists of a pipe for feeding into the inner chamber a mixture of volatile fatty acids from the separator and air from an air inlet, a pipe for feeding a substrate after the hydrolysis phase and acidogenesis from the inner chamber into the separator for separation of volatile fatty acids from the thick mass, and a pipe for feeding the thick mass, separated from the volatile fatty acids in the separator, into the outer chamber under gravity.
EFFECT: shorter duration of fermentation of organic wastes and high efficiency.
2 dwg
