发明名称 |
WASTEWATER TREATMENT METHOD AND WASTEWATER TREATMENT APPARATUS. |
摘要 |
<p>An aspect of the present invention provides a wastewater treatment method for treating wastewater containing ammonium nitrogen, including the steps of: oxidizing the ammonium nitrogen in the wastewater to nitrite with nitrifying bacteria in a treatment tank in which the nitrifying bacteria and anaerobic ammonium-oxidizing bacteria having a half-saturation constant of 6.1 mgN/L or more with respect to nitrite coexist; and denitrifying the nitrite formed through the oxidation of the ammonium nitrogen, with the anaerobic ammonium-oxidizing bacteria in the treatment tank, while using the ammonium nitrogen contained in the wastewater as a hydrogen donor. The method employs the anaerobic ammonium-oxidizing bacteria that can maintain the denitrification activity even under a condition in which the amount of dissolved oxygen is large, consequently can easily maintain the activities of both of the nitrifying bacteria and the anaerobic ammonium-oxidizing bacteria which coexist in the same treatment tank, and can rapidly perform wastewater treatment.</p> |
申请公布号 |
NL2004388(C) |
申请公布日期 |
2010.12.07 |
申请号 |
NL20102004388 |
申请日期 |
2010.03.12 |
申请人 |
HITACHI PLANT TECHNOLOGIES, LTD., |
发明人 |
ISAKA, KAZUICHI;KIMURA, YUYA;SUMINO, TATSUO |
分类号 |
C02F3/30;C02F3/34 |
主分类号 |
C02F3/30 |
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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