Removal of phosphates from sewage effluent

摘要: In sewage treatment wherein raw containing phosphate is passed into a primary clarifier to remove the heavy solids and effluent from subsequently discharged stream or subjected biological secondary treatment, phosphates are removed by intimately mixing with either high molecular weight, water soluble, linear, anionic polymer having weight average in excess of 100,000 an amount sufficient cause suspended solid particles, including said phosphate, settle increase rate settling, settling solids, adding aluminum compound supernatant liquid precipitate dissolved orthophosphate, separating settled precipitated along bacteria.