SYSTEM FOR MEMBRANE SEPARATION ACTIVATED SLUDGE AND METHOD FOR MEMBRANE SEPARATION ACTIVATED SLUDGE

摘要

PROBLEM TO BE SOLVED: To provide a system for membrane separation activated sludge and a method for the membrane separation activated sludge which reduce the amount of diffusion necessary for biological treatment and membrane separation.

SOLUTION: The system 10 for the membrane separation activated sludge includes a biological reaction vessel which biologically treats water to be treated with the activated sludge and a membrane separation tank 18 which carries out solid-liquid separation while causing the upward stream of the treated water from the biological reaction vessel among a plurality of flat membranes by dipping a membrane module 24 which has enclosed the sides of the plurality of the flat membranes which have been disposed in parallel with a casing 26, it is characterized in that the carrier 40 whose density is higher than water is added into the membrane separation tank 18 by making the activated sludge concentration of the biological reaction vessel higher than the concentration in which a nitrification reaction can be at least carried out and by making it possible to flow the inside of the membrane separation tank 18 with the upward stream.

COPYRIGHT: (C)2012,JPO&INPIT