Novel combined process for treating chemical wastewater

Abstract

The invention provides a novel combined process for treating chemical wastewater. The process adopts a regulating tank, an improved Fenton fluidized bed, a degassing neutralizing tank, a coagulative precipitation tank, an up-flow anaerobic sludge bed and an SBR (sequencing batch reactor), wherein the units are connected by a water pipe in sequence to treat the chemical wastewater. The novel combined process has the beneficial effects that the process is optimized and is clear and concise in route; the overall COD (chemical oxygen demand) removal rate is not less than 95%; the removal rate of characteristic organic pollutants is not less than 95%; and the process is convenient to operate and manage, is stable and is low in investment and operating costs.

Description

technical field [0001] The invention relates to a wastewater treatment method, in particular to a process method for chemical wastewater treatment, and belongs to the technical field of wastewater treatment. Background technique [0002] Chemical wastewater has the characteristics of large changes in water quantity and quality, poor biodegradability, difficult to degrade, and complex and diverse pollutants. Generally, appropriate pretreatment methods are adopted according to the actual wastewater quality, such as flocculation, micro-electrolysis, adsorption, and photocatalysis. Destroy refractory organic matter in wastewater, improve the biodegradability of wastewater, and then use biological methods, such as ABR, SBR, A / O process, etc., to treat chemical wastewater. At present, domestic and foreign research on the process of treating chemical wastewater also tends to adopt a combination of multiple methods. [0003] Judging from the existing patent materials, although the ...

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Problems solved by technology

[0003] Judging from the existing patent materials, although the Chinese patent "Aerobic-anaerobic microbial repeated coupling treatment of sewage new technology (CN200310121766.7)" has a good effect, it will increase the cost of the device to a certain extent, and the aerobic-anaerobic microorganism Anaerobic repeated coupling is not conducive to the absolute anaerobic environment of microorganisms, and the efficiency of biological treatment is not high

The patent "a baffle reactor and its method for treating sewage (CN200610012070)" and the patent "integrated high-concentration organic wastewater treatment device (CN200310100513.1)" involve multiple couplings of anaerobic and aerobic processes, increasing The complexity of the equipment and the difficulty of operation and management, and there is no advanced oxidation process

[0004] At present, the existing chemical wastewater treatment process has problems such as high treatment cost, low removal efficiency of refractory organic pollutants, unstable process operation, unsatisfactory treatment effect, and failure to meet environmental protection requirements.

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