MEMBRANE APPARATUS FOR METHANE FERMENTATION TREATMENT AND METHOD FOR METHANE FERMENTATION TREATMENT

摘要

A membrane apparatus for methane fermentation treatment which comprises: a membrane separation tank (14) provided with a membrane separation unit (18) integrated therein; circulation pipes (15, 16) circulating a digested sludge between a methane fermentation tank (12) and the membrane separation tank (14); an air diffuser unit (19) diffusing a biogas in the methane fermentation tank (12) from the bottom side of the membrane separation unit (18); a discharge unit (23) discharging said biogas from a discharge port (22) opened in the digested sludge in the methane fermentation tank (12); a common blower unit (24) supplying said biogas to the air diffuser unit (19) and the discharge unit (23); and a switching unit (25) switching between an air-diffusion state, wherein said biogas supplied from the blower unit (24) is diffused from the air diffuser unit (19), and a discharge state, wherein said biogas is discharged from the discharge unit (23).