Method for improving biological denitrification treatment efficiency of industrial wastewater

A technology for industrial wastewater and biological denitrification, which is applied in the field of environmental pollution treatment, can solve the problems of low efficiency of biological denitrification of industrial wastewater such as ammonia nitrogen and total nitrogen, so as to improve the efficiency of biological denitrification, enhance the denitrification ability, and improve the efficiency of biological treatment Effect

Active Publication Date: 2018-04-06
DONGHUA UNIV +1
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Problems solved by technology

[0004] The problem to be solved by the present invention is: the biological denitrification efficiency of industrial wastewater is low and how to improve the removal efficiency of ammonia nitrogen and total nitrogen

Method used

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  • Method for improving biological denitrification treatment efficiency of industrial wastewater

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Embodiment 1

[0024] A method for improving the efficiency of biological denitrification treatment of industrial wastewater:

[0025] (1) A printing and dyeing wastewater treatment plant adopts biological denitrification treatment process, takes the remaining activated sludge, decants the supernatant after static settling, and saves the settled sludge for later use. They are respectively used in the laboratory to build two sets of identical aerobic-anoxic-aerobic-anoxic reactors (O pool-A pool-O pool-A pool), and the sludge concentration of the two sections of A pool is 4.5g / L, the sludge concentration of the two O pools is about 3.5g / L, and the printing and dyeing wastewater to be treated in the printing and dyeing wastewater treatment plant is used as the influent;

[0026] (2) In one group of O pool-A pool-O pool-A pool reactor, 40g / L of biomass carbon iron catalyst was added to the two O pools, and the dissolved oxygen was adjusted to 3mg / L. After the printing and dyeing wastewater inf...

Embodiment 2

[0032] A method for improving the efficiency of biological denitrification treatment of industrial wastewater:

[0033] (1) For a caprolactam production enterprise, the waste water produced in the production process is mainly organic waste water, which originates from the process waste liquid, washing and cleaning waste liquid, oil phase and water phase discharge of cyclohexanone, caprolactam, hydroxylamine and other processes . The pollutants in caprolactam production wastewater mainly include cyclohexanone, benzene, toluene, petroleum and so on. The wastewater contains a large amount of complex components, high-concentration, refractory organic matter and a high concentration of ammonia nitrogen. The concentration of ammonia nitrogen in the influent is 200mg / L, and the concentration of total nitrogen is 240mg / L;

[0034](2) Denitrification treatment of caprolactam production wastewater by biological process. First build the O pool-A pool-O pool-A pool reactor, the sludge c...

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Abstract

The invention discloses a method for improving the biological denitrification treatment efficiency of industrial wastewater. The method is characterized in that a biomass carbon iron catalyst filler is added in a biological aerobic tank, industrial wastewater is introduced into the aerobic tank in batches, all reaction outgoing water is completely returned for circulating operation, and an aerobicbiomass carbon iron coupling system through domestication; a biomass carbon iron catalyst filler is added in a biological anoxic tank, and the outgoing water of the biological aerobic tank is mixed with industrial wastewater, and the mixed wastewater is used as inlet water, reaction outgoing water is completely returned for circulating operation, and an anoxic biomass carbon iron coupling systemis formed through domestication; and the two coupling systems are subjected to multi-stage combination to form a multi-stage enhanced denitrification system, industrial wastewater is continuously fedand outgoing water is subjected to sedimentation separation in a sedimentation tank. The method of the invention can realize reduction of the toxicity of refractory organics, strengthen the efficiencyof biological nitrification and denitrification, couple autotrophic denitrification and simultaneous nitrification and denitrification, thereby significantly improving the biological denitrificaitoneffect of industrial wastewater.

Description

technical field [0001] The invention belongs to the technical field of environmental pollution treatment, and in particular relates to a method for improving the efficiency of biological denitrification treatment of industrial wastewater. Background technique [0002] With the rapid development of my country's chemical industry, the amount of waste water produced is huge, and there are many types of organic waste water produced. If it is not handled properly, it will pose a huge threat to the environment. Industrial wastewater has a high concentration of organic matter, and COD is generally thousands or even tens of thousands of mg / L, but its biodegradability is low, and the ratio of BOD to COD in many wastewaters is less than 0.3; in addition, industrial wastewater has complex components and often has certain toxicity. At present, there are many methods for organic industrial wastewater treatment, but the most widely used biological treatment process is still relatively low...

Claims

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Application Information

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IPC IPC(8): C02F3/30C02F3/10C02F3/28C02F101/16
CPCC02F3/106C02F3/28C02F3/302C02F2101/16C02F2203/004C02F2301/08Y02W10/10
Inventor 陈红薛罡李响钱雅洁刘云帆张文启刘振鸿王小暖安婧汪钟凝李前孟程程
Owner DONGHUA UNIV
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