Title:
有機性廃液の生物処理装置
Document Type and Number:
Japanese Patent JP5061551
Kind Code:
B2
Abstract:
A digested sludge of an organic waste liquid is concentrated and the concentrated sludge is returned into a biological treatment tank. Thus, digestion is efficiently carried out and the reduction ratio of the sludge is elevated. An organic waste liquid is fed into a biological treatment tank (1) and biologically treated therein. A portion of the digested sludge in the biological treatment tank (1) is withdrawn via a pipe (2), a pump (3) and another pipe (4) and then concentrated by a centrifugal machine (5). The concentrated sludge having been concentrated by the centrifugal machine (5) is fed into a mixing tank (6). The separated liquid is discharged from the apparatus via a pipe (7). A portion of the sludge (the unfractionated sludge) is introduced into a centrifugal machine (13) and centrifuged into a fraction containing suspended organic solids at a higher ratio and the other fraction containing suspended organic solids at a lower ratio. The low-organic fraction is discharged from the biological treatment apparatus via a pipe (15). The high-organic fraction can be fed into the mixing tank (6) via a pipe (14). The unfractionated sludge in the pipe (10) can be fed into the mixing tank (6) via a pipe (16) that is branched from the pipe (10), a valve (17) and another pipe (18).
Inventors:
Kazuya Komatsu
Hideyoshi Yasui
Hideyoshi Yasui
Application Number:
JP2006255493A
Publication Date:
October 31, 2012
Filing Date:
September 21, 2006
Export Citation:
Assignee:
Kurita Water Industries Ltd.
International Classes:
C02F3/12; C02F11/00; C02F11/127; C02F11/18
Domestic Patent References:
| JP2002161291A | ||||
| JP2005199258A | ||||
| JP55162399A | ||||
| JP57127498A |
Attorney, Agent or Firm:
Tsuyoshi Shigeno