... remove large suspended matter and solid, then flow into equalize tank , to equalize effluent water quality and volume, there equip ... with 2pcs sewage lifting pump in equalize tank, effluent lifting to neutralizing coagulant settling tank, due to the effluent PH value is ... part of organism and chroma, make the sludge in second settling pond backflow into coagulant pond, Participate in coagulant reaction, ...