METHANE FERMENTATION PLANT

• Main Authors: KURAHASHI YOSHIHIKO, KAMEOKA TOSHINORI, MORI TAKESHI, MORI TADAAKI
• Format: Patent
• Language: English
• Published: 13.12.2007
• Subjects: APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; BEER; BIOCHEMISTRY; CHEMISTRY; ENZYMOLOGY; METALLURGY; MICROBIOLOGY; MUTATION OR GENETIC ENGINEERING; SPIRITS; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE; VINEGAR; WINE

PROBLEM TO BE SOLVED: To provide a methane fermentation plant in which sand is not be precipitated/accumulated at the bottom of a methane fermentation tank, which is made simple and inexpensive and the treatment efficiency of which is made high. SOLUTION: The methane fermentation plant is characterized in that at least one pump 9 is used and the courses of fluids flowing through a motor-driven switching valve 10 are changed when a squeezed liquid B is introduced into the methane fermentation tank 6 from a squeezed liquid tank 3, when a liquid D withdrawn from the methane fermentation tank is returned to the methane fermentation tank, when the liquid D withdrawn from the methane fermentation tank is supplied to a sand separator 7 and a sand-removed liquid is returned to the methane fermentation tank, when the liquid D withdrawn from the methane fermentation tank is supplied to a gas inspirator 8 and a gas-removed liquid is returned to the methane fermentation tank, and when a digested liquid E withdrawn from the methane fermentation tank is transferred to a digested liquid tank 11. The methane fermentation plant is made simple and inexpensive by adopting the sand separator 7 for removing sand, a balloon-type gas holder 4, a simplified building 5 and the squeezed liquid tank 3 and the methane fermentation tank 6 both of which are formed by using prefabricated concrete retaining walls 3a, 6a and watertight sheets 3b, 3a. COPYRIGHT: (C)2008,JPO&INPIT