METHOD AND APPARATUS FOR BIOLOGICAL TREATMENT

摘要

PROBLEM TO BE SOLVED: To provide a biological treatment method enabling stable and efficient solid-liquid separation treatment and a biological treatment apparatus relatively reduced in the space required for installation and high in economical efficiency. SOLUTION: A separation tank 9 in which at least one hollow cylindrical filter body 9b is immersed is arranged to the rear stage of a biological treatment tank 6 in which at least one hollow cylindrical filter body 9a having filter cloth wound around the outer peripheral surface thereof is immersed and the solid-liquid separation of the biological reaction liquid 15 in the biological reaction tank 6 is performed by the filter body 9a. The filtrate 15a in the filter body 9a is supplied to the separation tank 19 to be further subjected to the solid-liquid separation treatment in the filter body 9b of the separation tank 19 to take out the filtrate in the filter body 9b as treated water 13.