发明授权
- 专利标题： Wastewater treatment method comprising decantation and fine screening stages
- 专利标题（中）： 废水处理方法包括倾析和精细筛选阶段
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申请号： US12093524申请日： 2006-11-02
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公开(公告)号： US07981297B2公开(公告)日： 2011-07-19
- 发明人: Philippe Sauvignet , Claus Poulsen Dahl
- 申请人： Philippe Sauvignet , Claus Poulsen Dahl
- 申请人地址： FR Saint Maurice Cedex
- 专利权人： OTV SA
- 当前专利权人： OTV SA
- 当前专利权人地址： FR Saint Maurice Cedex
- 代理机构： Coats & Bennett, P.L.L.C.
- 优先权： FR0511525 20051114
- 国际申请： PCT/EP2006/068046 WO 20061102
- 国际公布： WO2007/054461 WO 20070518
- 主分类号： C02F1/32
- IPC分类号： C02F1/32 ; C02F1/42 ; C02F1/54
摘要：
A method for removing helminth egg and other suspended solids from a wastewater stream includes directing the wastewater to a ballasted flocculation system and adding a coagulation agent, flocculation agent and a ballast into the wastewater. Sludge is settled from the wastewater in a settling tank at a rate of at least 10 meters per hour. The method further includes removing helminth egg by filtering the effluent through a fine screen having a mesh diameter of approximately 5 micrometers to approximately 25 micrometers. After passing through the fine screen, the filtered effluent has less than one helminth egg per liter.
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