Processes and systems for treating wastewater effluent

摘要

The present invention is directed to a process for treating wastewater effluent, specifically from industrial processes. Contaminated wastewater effluent is treated acidified to a pH value below 7. The acidified wastewater effluent is then treated with a paste-type mixture containing magnesium hydroxide, activated carbon and water to form insoluble magnesium salts and simultaneously remove organics from the wastewater. The wastewater effluent is treated with a precipitating agent to precipitate contaminants from the wastewater effluent. A flocculating agent is then used to treat the wastewater effluent to reduce the colloidal and finely divided solids in the wastewater effluent. The substantially contaminant-free liquid effluent is separated from the contaminants by settling or filtering techniques. The substantially contaminant-free liquid effluent can be recycled back through the industrial process or discarded into a municipal sewer system with little or no municipal surcharge.