Invention Grant
- Patent Title: Process for reducing the sulfate concentration in a wastewater stream by employing regenerated gibbsite
- Patent Title (中): 通过再生三水铝矿降低废水流中硫酸盐浓度的方法
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Application No.: US14087629Application Date: 2013-11-22
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Publication No.: US09278875B2Publication Date: 2016-03-08
- Inventor: Kashi Banerjee , Charles D. Blumenschein , John Charles Schrader , Robert G. Cook
- Applicant: Veolia Water Solutions & Technologies Support
- Applicant Address: FR Saint-Maurice
- Assignee: Veolia Water Solutions & Technologies Support
- Current Assignee: Veolia Water Solutions & Technologies Support
- Current Assignee Address: FR Saint-Maurice
- Agency: Coats and Bennett PLLC
- Main IPC: B01D21/00
- IPC: B01D21/00 ; C02F1/52 ; C02F1/58 ; C02F101/10 ; C02F103/10
Abstract:
A method for removing sulfate from a wastewater stream includes mixing gibbsite and a calcium source to precipitate Ettringite from the wastewater stream and produce an effluent with a reduced sulfate concentration. The gibbsite in the precipitated Ettringite is regenerated by mixing an acid with the Ettringite and precipitating gibbsite particles, after which the gibbsite particles are subjected to a crystallization process to increase the size of the gibbsite particles which are recycled back to the main stream.
Public/Granted literature
- US20140144843A1 Process for Reducing the Sulfate Concentration in a Wastewater Stream by Employing Regenerated Gibbsite Public/Granted day:2014-05-29
Information query
