Heavy metal sewage treatment system

Abstract

The invention discloses a heavy metal sewage treatment system, which successively comprises a neutralization pond, a coagulation reaction pond, a flocculation reaction pond, a separation pond and a recovery system, wherein the neutralization pond and the coagulation reaction pond are independently provided with a stirrer and a metering pump; the bottom of the neutralization pond is connected with the coagulation reaction pond; a baffle is arranged in the separation pond, and is provided with a micro-filtration membrane; the upper part of the separation pond is provided with a drain pipe; the bottom of the separation pond is connected with the recovery system through a screw conveyor. According to the heavy metal sewage processing system disclosed by the invention, a rate of removing heavy metal in sewage is improved, discharge water is improved to achieve a surface water V class standard or above, sludge discharge is reduced, and continuous operation, automation, convenience in installation, small land occupation and low cost are realized.

Description

technical field

[0001] The invention relates to the field of sewage treatment equipment, in particular to a heavy metal sewage treatment system. Background technique

[0002] There are many heavy metals such as copper, iron, zinc, and magnesium in sewage, which are either dissolved or suspended in sewage. The traditional sewage purification method is to remove the suspended matter in the sewage through filtration or flocculation, and then use activated sludge method, water spray filter bed method, anaerobic and other microbial treatment methods to remove the dissolved substances in the sewage. The flocculants generally used to remove suspended matter are inorganic flocculants such as aluminum sulfate, ferric sulfate, and ferrous sulfate, or polymer flocculants such as polyacrylamide and polyaluminum chloride. These flocculants can effectively remove suspended matter in sewage, but cannot remove dissolved pollutants. Soluble pollutants can be removed by microbial methods, b...

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