| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To solve a problem wherein, in sewage treatment using microorganisms, when the quality or quantity of flowing-in sewage varies, removal of organic matter (BOD), particularly nitrogen or phosphorus becomes unstable, and treatment performance (removal performance of the nitrogen or phosphorus) is resultantly degraded. <P>SOLUTION: Flowing-in sewage is subjected to solid-liquid separation into separated water and separated sludge, the separated water is treated by being introduced into a biotreatment tank, the separated sludge is concentrated by a concentrator, and a concentrated separated liquid containing organic matter is transferred to a biological reactor. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
