发明名称 |
Control method in double-tank-type intermittent aeration activated sludge process |
摘要 |
In an intermittent aeration activated sludge process in which aeration and agitation is repeated alternately, a first aeration tank and a second aeration tank are connected to each other and an ORP meter is applied to each tank. In the first aeration tank, the sum of an aeration period and a denitrification period of an agitation step is controlled to a predetermined period Tgs based on a time when a bending point appeared on an ORP curve in a previous cycle. In the second aeration tank, the sum of an aeration period and an agitation period is controlled to a predetermined period Tds longer than Tgs based on a time when an ORP measured value reached a predetermined value in a previous cycle. Operations of the first and second aeration tanks are simultaneously transferred from the agitation to the aeration based on detection of the predetermined ORP value. As a result, a necessary anaerobic condition period is secured in the first aeration tank.
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申请公布号 |
US5304308(A) |
申请公布日期 |
1994.04.19 |
申请号 |
US19930053018 |
申请日期 |
1993.04.27 |
申请人 |
FUJI ELECTRIC CO., LTD.;UNITIKA LTD. |
发明人 |
TSUMURA, KAZUSHI;YAMAMOTO, YASUJI;SASAKI, KOSEI;HATSUMATA, SHIGERU |
分类号 |
C02F3/12;C02F3/00;C02F3/30;(IPC1-7):C02F3/30 |
主分类号 |
C02F3/12 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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