| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method for concentrating sludge compact, excellent in silent noise and low in running cost. <P>SOLUTION: The method for concentrating the sludge comprises biologically treating organic waste water of sewage or the like in a biological reactor 11, and concentrating excess sludge E produced by the biological treatment, wherein the excess sludge E is electrolyzed by an electrolytic concentration device 14 and the floatation concentration of a solid substance is carried out by a fine air bubble generated by electrolysis. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
