METHOD AND APPARATUS FOR PRODUCING ORGANIC ACID

摘要

PROBLEM TO BE SOLVED: To provide a method for producing an organic acid enhancing the production efficiency of the organic acid and an apparatus for producing the organic acid. SOLUTION: The method for producing the organic acid comprises producing the organic acid by configuring a multiple acid fermentation tank 2 to successively carry out acid fermentation of raw sludge in each of tanks 2a and 2b, separating an organic acid solution produced in the acid fermentation tank 2 and acid producing bacteria-containing sludge by an organic acid separator 3, forming a high-load condition of the raw sludge and the acid producing bacteria-containing sludge compared to a single acid fermentation tank introducing the same amount of the raw sludge and the acid producing bacteria-containing sludge by providing one tank and the same volume (the same volume as the total of each tank in the multiple tank) from the relation of sludge volume/tank volume in each tank on the downstream side including the tank introducing the acid producing bacteria-containing sludge by introducing the acid producing bacteria-containing sludge for carrying out acid fermentation into any tank of each of the tanks 2a and 2b configuring the acid fermentation tank 2, and promoting the acid fermentation while suppressing the methane fermentation. COPYRIGHT: (C)2007,JPO&INPIT