Pesticide wastewater has an extremely high total phosphorus level, making it impossible to send it to sewage treatment plants. What are the ways to reduce the total phosphorus content?
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After pretreatment of the wastewater from the pesticide factory, the COD levels are around 1000, ammonia nitrogen is around 30, and TP is 130. This wastewater enters the industrial park’s sewage treatment plant, causing foam to form in the biological treatment tanks and sludge to float to the surface. How should this be dealt with?
Is it organophosphorus? Can we first use Fenton’s reagent and then add slaked lime to precipitate P?
1. Biological phosphorus removal: This involves polyphosphate-accumulating bacteria absorbing excess free phosphorus, which is then removed from the system through sludge discharge (excess sludge), thereby achieving phosphorus removal. 2. Chemical phosphorus removal: This is achieved by adding coagulants containing iron or aluminum, such as polyaluminum chloride.