Method for treating chemical wastewater through IFBR-EGSB-CASS (Improved Fluidized Bed Reactor-Expanded Granular Sludge Bed-Cyclic Activated Sludge System) process

Abstract

The invention provides a method for treating chemical wastewater through an IFBR-EGSB-CASS (Improved Fluidized Bed Reactor-Expanded Granular Sludge Bed-Cyclic Activated Sludge System) process. The process comprises a regulating reservoir, an improved Fenton fluidized bed, a degassing neutralization tank, a coagulative precipitation tank, an anaerobic expanded granular bed and a CASS reactor; the units are connected sequentially through a water pipe, so as to treat the chemical wastewater. The process is optimized, the line is clear and concise, the overall removal rate of COD (Chemical Oxygen Demand) is larger than or equal to 95%, the removal rate of organic featured pollutants is larger than or equal to 95%, the operation management is convenient, the process is stable, and the investment operating cost is low.

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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