Patent ID: 8372283
Filing Date: 2013-02-12
Classification: C02F,Y02W

Abstract:
1. A treatment method to enhance the treatment of wastewater containing pathogens, chemicals/pharmaceuticals, and suspended solids at wastewater treatment plants employing bioreactors by removing chemicals/pharmaceuticals before biological reduction comprising: a. injecting SO i. conditioning suspended solids to agglomerate and sorb polar chemicals/pharmaceuticals to separate from the liquid fraction of the acidified wastewater, and ii. providing free SO2 for reducing chemical oxidants in the wastewater influent to produce an acidified treated influent, b. separating the agglomerated suspended solids from the acidified treated influent for disposal, c. adjusting the pH of the acidified treated influent with hydrated or anhydrous lime, ammonia, sodium and potassium hydroxide and other alkaline chemicals to reduce the biocidal properties of any free SO d. separating the alkaline precipitates in the treated effluent for reuse or disposal, and e. passing the treated effluent through the sewage treatment plant's bioreactors for anaerobic and aerobic degradation of remaining chemicals/pharmaceuticals in the treated effluent or through an environmental biological system to produce a recovered treated wastewater.