Modular composite advanced treatment system and operation method for low-concentration heavy metal wastewater
A low-concentration heavy metal, advanced treatment technology, applied in water/sewage treatment, chemical instruments and methods, biological water/sewage treatment, etc. Effects of adsorption activity and adsorption capacity, increasing specific surface area, and improving efficiency
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[0094] The effluent quality of the sewage discharge outlet of an electroplating factory meets the standard discharge, and the concentration of heavy metal Cd is 0.5mg / L at this time.
[0095] Adopt the system of the present invention to carry out compound processing, processing scale 50m 3 / d. Seven adsorption units are arranged in each layer of water collection tank, the size of the adsorption filling layer in each water collection tank is 65cm×65cm×5cm, and the filling capacity of each adsorption unit is about m=36kg. The plant cultivation tray 28 in the three-layer water collection tank is matched with planting aquatic plants Erythrina chinensis and cattail, and in the water collection buffer tank 15, the aquatic plant reed is planted.
[0096] Wastewater containing low-concentration heavy metal Cd has reached a concentration of 0.002 mg / L through this modular composite advanced treatment method. After 6 months of continuous operation, the quality of the effluent is stable...
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