Client: Shanghai Zhongtian Kesheng Enterprise Development Co., Ltd
Address: Shanghai Delivery time: August 2014
The daily treatment capacity of this wastewater station is 1950 tons/day, mainly including comprehensive wastewater, phosphorus containing wastewater, copper nickel containing wastewater and chromium containing wastewater. This description focuses on the treatment process of heavy metal wastewater.
The copper and nickel containing wastewater from the electroplating production line flows automatically into the copper and nickel containing wastewater transition pool of the wastewater treatment station through the drainage pipe network. The pool is equipped with high, medium and low water level probes and alarm devices. When the level is high, the lift pump of the copper and nickel containing wastewater transition pool starts automatically to lift the wastewater to the copper and nickel containing wastewater collection pool, which is equipped with high, medium and low water level probes and alarm devices, At high level, the lift pump of the copper nickel containing wastewater collection tank starts automatically to transport the wastewater to the copper nickel containing wastewater reaction tank, where the pH of the wastewater is adjusted to 10~10.5 by adding H2SO4 and NaOH, and the sodium hydroxide is added continuously. The heavy metals in the wastewater generate hydroxide precipitation, and then PAC and PAM are added to mix and flocculate the hydroxide in the wastewater, The sludge water mixture flows into the copper nickel containing wastewater sedimentation tank by gravity for sludge water separation, the sludge is regularly discharged into the sludge storage tank, and the effluent flows into the intermediate pool by gravity. The intermediate pool is equipped with high, medium and low water level probes and alarm devices. When the water level is high, the lift pump of the intermediate pool starts automatically, and the wastewater is sent to the sand carbon filter for filtration. The effluent enters the precision filter and the heavy metal protection column to further absorb the residual heavy metals, and the effluent can be discharged up to the standard.