发明授权
- 专利标题： Process for reducing the sulfate concentration in a wastewater stream
- 专利标题（中）： 减少废水流中硫酸盐浓度的方法
-
申请号： US13166928申请日： 2011-06-23
-
公开(公告)号： US09085477B2公开(公告)日： 2015-07-21
- 发明人: Kashi Banerjee , Charles D. Blumenschein , Robert G. Cook , John C. Schrader
- 申请人： Kashi Banerjee , Charles D. Blumenschein , Robert G. Cook , John C. Schrader
- 申请人地址： FR Saint Maurice
- 专利权人： Veolia Water Solutions & Technologies Support
- 当前专利权人： Veolia Water Solutions & Technologies Support
- 当前专利权人地址： FR Saint Maurice
- 代理机构： Coats and Bennett PLLC
- 主分类号： B01D21/00
- IPC分类号： B01D21/00 ; C02F1/52 ; B01D11/02 ; C02F1/44 ; C02F101/10 ; C02F103/10 ; C02F103/16 ; C02F103/36 ; C02F1/66 ; C02F5/06
摘要：
A method of reducing a sulfate concentration in wastewater comprises directing the wastewater stream to a precipitation reactor and mixing the wastewater stream with a calcium source and a calcium salt seed material to precipitate calcium sulfate. The precipitated calcium sulfate is then separated from a treated effluent and directed to a settling tank where the precipitated calcium sulfate is separated into heavier calcium sulfate precipitants and lighter calcium sulfate precipitants. The heavier calcium sulfate precipitants and the lighter calcium sulfate precipitants are separately recirculated to the precipitation reactor. A predetermined mass ratio of solids is maintained in the precipitation reactor.
公开/授权文献
信息查询
