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Title:
オキシデーションディッチの運転条件決定方法
Document Type and Number:
Japanese Patent JP4295190
Kind Code:
B2
Abstract:

To provide a method for determining the operation condition of an oxidation ditch capable of efficiently determining the operation condition such as the depth of immersion of an impeller, the number of rotation or the like.

The method for determining the operation condition of the oxidation ditch 1 includes a circulation water path 8 having an endless edge, and the impeller 3 for agitating and aerating a mixture liquid 2 of waste water and activated sludge flowed in the circulation water path 8. In this method, if a flow rate of the mixture liquid 2 denotes V, the depth of immersion of the impeller 3 denotes X, power introduction density denotes Y and a sludge concentration (MLSS) denotes Z, the depth of immersion of the impeller 3 and the power introduction density are determined from the flow rate of the mixture liquid 2 and the sludge concentration based on a relational expression given by V=a×X+b×Y+c×Z+d (wherein a, b, c and d are a predetermined constant).

COPYRIGHT: (C)2006,JPO&NCIPI


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Inventors:
Kazuo Sekizawa
Kenjiro Fuchiwaki
Masanobu Ogata
Satoru Teshima
Application Number:
JP2004295347A
Publication Date:
July 15, 2009
Filing Date:
October 07, 2004
Export Citation:
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Assignee:
Sumitomo Heavy Industries Environment Co., Ltd.
International Classes:
C02F3/16; B01F3/04; C02F3/12; C02F3/34
Domestic Patent References:
JP2001269691A
JP2001252681A
JP2003334593A
JP8323384A
JP9141289A
JP2001334286A
JP2001252691A
Attorney, Agent or Firm:
Yoshiki Hasegawa
Shiro Terasaki
Yoshiki Kuroki