Then the mixture of activated sludge and influent wastewater clarifier II is responsible for settling and separating sludge from waste water. After settling mud content SS = 7000 - 8000 mg / L, a portion will be recycled to the anoxic tank (25-75% flow) to stabilize the density of bacteria facilitate rapid decomposition of organic matter, and MLSS concentration stabilization time = 3000 mg / L. After waste water through settling tanks will automatically flow into the tank II disinfection to destroy harmful bacteria before being discharged read the receiving water.
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