Industrial park heavy metal wastewater advanced treatment device and method

Abstract

The invention relates to an industrial park heavy metal wastewater advanced treatment device which comprises a physical filter system (1), a multifunctional coagulative precipitation system (2), a combined biochemical system (3) and an MBR (membrane bioreactor) membrane system (4) which are sequentially connected, wherein the physical filter system is a 2mm fine grid, and is used for removing smaller floating materials and solid matters with the diameter of greater than 2mm in sewage, thereby ensuring the effect of the subsequent biological treatment system and the stable operation of maintenance equipment. The combined biochemical tank is composed of a hydrolysis+A2O tank, the MBR membrane system and a matched sludge concentration tank. The water treatment technique is carried out by sequentially using the units above. The physical filter system is a 2mm fine grid, and a stirrer is respectively arranged in an anaerobic section and an anoxic section. The anaerobic region, anoxic region and aerobic region are strictly separated, thereby being beneficial to the reproduction and growth of different microbial florae, and having favorable denitrification and dephosphorization effects.

Description

technical field [0001] The invention relates to a method and a device for advanced treatment of heavy metal wastewater; it is suitable for newly built, reconstructed and expanded industrial park wastewater treatment plants, and can also be used for municipal sewage treatment plants with similar working conditions. Background technique [0002] According to statistics, as of now, the Ministry of Commerce has approved the establishment of more than 1,700 development zones above the provincial level, and more than 5,000 industrial concentration areas at or below the municipal level. Industrial parks have become one of the main carriers of my country's industrial development and an important platform for the prosperity of the regional economy and the promotion of industrial modernization. However, due to the complex composition of heavy metal wastewater, the difficulty of treatment, the complex treatment technology required, the large cost of treatment, and the lack of supervisi...

AI Technical Summary

Problems solved by technology

However, due to the complex composition of heavy metal wastewater, the difficulty of treatment, the complex treatment technology required, the large cost of treatment, and the lack of supervision, the industrial park, which was originally regarded as a booster for local economic development, has gradually become a heavy metal wastewater pollution. In the gathering area, the phenomenon of direct and sneaky discharge of heavy metal wastewater occurs from time to time, which has brought great pressure to the local water environment. On the other hand, industrial parks have a large amount of heavy metal wastewater discharge and concentrated pollutants, so effective treatment is imminent.

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