Method for promoting denitrification and dephosphorization of activated sludge sewerage by using composite iron enzyme

Abstract

The invention relates to a method for denitrifying and dephosphorizing enzyme-induced active sludge and wastewater of composite iron through utilization of a manual manipulation means to realize organic combination between metallic ions and an active sludge microorganism floccule and strengthen an electronic transfer chain and enzyme induction through the metallic ions in the technical field of wastewater treatment. The method is divided into two stages of cultivation and stable operation of the enzyme-induced active sludge of the composite iron; the device system comprises a pretreatment system, a primary treatment system, a primary sedimentation sludge discharge system, a secondary biochemical treatment system, a residual sludge discharge system and a water outlet system, wherein the secondary biochemical treatment system comprises an anoxic pool, an anaerobic pool, an aerobic pool, a secondary sedimentation pool, a mixed liquid inner circulation system, a sludge reflowing system and a dosing system; and the water outlet system comprises a contact disinfection pool. The method has a simple and reliable dosing mode, convenient management and low investment and operating cost and is suitable for deep denitrification and dephosphorization treatment of urban and town sewage and industrial wastewater and upgrading construction of urban and town sewage engineering.

Description

Technical field: [0001] The invention relates to a process method for denitrification and dephosphorization of sewage in the technical field of sewage treatment, in particular to a method for organically combining metal ions with activated sludge microbial flocs by using artificial control means, and strengthening the electron transfer chain through metal ions A method for denitrification and phosphorus removal of activated sludge sewage enzymatically catalyzed by compound iron with enzymatic action. Background technique: [0002] Since the 1970s, global water eutrophication has become a water environmental pollution problem that has attracted worldwide attention. Although the mechanism of water eutrophication is complicated, the high content of plant nutrients such as nitrogen and phosphorus in water is the direct cause of eutrophication. Controlling the entry of nitrogen and phosphorus into water is the key to solving water eutrophication The fundamental approach to the p...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the disadvantages of low treatment efficiency, poor operation stability, low temperature impact on biological nitrification activity, and large toxic effect of auxiliary chemical phosphorus removal metal ions on microorganisms in the existing sewage biological nitrogen and phosphorus removal technology. A kind of iron salt chemical agent is directly added to the rear part of the aerobic zone of sewage biological nitrogen and phosphorus removal, so that it can strengthen the electron transfer of iron ions participating in the microbial metabolic process on the basis of the combination of iron salt chemical flocs and activated sludge microbial flocs Chain and enzymatic reaction activation, improving the biochemical reaction activity of nitrogen and phosphorus removal microorganisms and the system's ability to remove nitrogen and phosphorus and applicable to the biological nitrogen and phosphorus removal of urban sewage and industrial wastewater

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