Patent KR-101342982-B1 (KR)
Title: A bio gas manufacturing system using livestock excretions and food waste
Inventor: KIM WON JUNG
IPC: C10L3/08
Filed: 2012-09-05
Granted: 2013-12-18
Abstract: The present invention relates to a bio gas manufacturing system using food waste and livestock excretions, producing bio gas and fertilizers by using alkaline livestock excretions and acid food waste or butchery byproducts. A livestock excretion collecting tank (1) and a food waste collecting tank (2) are comprised to mix alkaline livestock excretion and acid blood or food sludge for balancing the pH and supplying. The raw materials from the livestock excretion collecting tank and food waste collecting tank are mixed and sent to a centrifugal solid liquid separator (10), the solid matters are made into fertilizers and the liquid is sent to a pH modulating part (40). The liquid sent to the pH modulating part is neutralized and connected to a first anaerobic fermentation tank (70) and a second anaerobic fermentation tank (80), respectively. The first and second anaerobic fermentation tanks are also connected each other to be operated independently or integrally. The first and second anaerobic fermentation tanks are passed by a digesting liquid first storage tank (100) through the lower part and then connected to a digesting liquid storage tank (110). The first and second anaerobic fermentation tanks are connected to a gas storage tank (90) through the upper part. The bio gas generated by stirring, loses temperature through a cooler and a heat exchanger, and is desulphurized in a dry method then supplied to the gas storage tank. The gas storage is connected to at least one boiler (120) and at least one power generator (130) to supply the bio gas. [Reference numerals] (10) Centrifugal solid liquid separator(M-103A);(100) Digesting liquid first storage tank;(110) Digesting liquid storage tank 3,000T;(120,K1) Boiler(25kw);(130,K2) Power generator(200kw);(2) Food waste collecting tank;(20) Reaction tank;(31,51) Filterate collecting side hole;(41) pH modulating tank;(42) Flux controlling tank(mixing liquid storage tank);(55) Fermentation stirring machine;(70) Anaerobic fermentation tank B (38°C) 1,250m^3;(80) Anaerobic fermentation tank A (38°C) 1,250m^3;(90) Gas storing tank 500m^3;(AA) Livestock excretions 70ton/day;(BB) Livestock excretions collecting tank;(C1) pH modulating solution tank;(C2) Acid;(C3) Alkali;(D1,D2) dry desulferization;(EE) Verdant acid remover;(FF) Air compressor;(GG) Cooler;(HH) Supplement water;(II) Heat exchanger;(JJ) Bio gas 3081m^2/day(methane 57.7%);(L1) Fermentation tank A;(L2) Fermentation tank B;(L3) Livestock excretions collecting tank;(L4) Food waste collecting tank;(MM) Surplus combustion gas;(NN) Injection amount 100m^2/day(percentage of water content 73.7%);(OO) Filterate;(PP) Solid matter;(QQ) Food waste 30ton/day;(RR) Transportation amount 94.8m^2/day(percentage of water content 97%);(SS) Digesting liquid;(TT) Compost packing facility;(U1) First fermentation tank fan;(U2) Ventilation fermentation tank;(V1) Second fermentation tank fan;(V2) Mechanical fermentation tank;(V3) Digesting liquid tank;(WW) After-ripening fermentation tank;(XX) After-ripening fermentation tank fan