A sewage nitrogen and phosphorus removal process and sewage system, total nitrogen and total phosphorus were reduced to 1mg/L and 0.2mg/L, the process comprises the following steps: A: to be processed so that the wastewater concentration of 3 NH N less than 0.2mg/L sewage treatment; step B: step a to sewage denitrification treatment hypoxia; step C: step B the wastewater and aerobic degradation of organic matter and chemical precipitation process. Process and system of sewage treatment is the first fully reduce the concentration of ammonia nitrogen in the sewage, to complete nitrification, ensure subsequent anoxic denitrification treatment to achieve complete denitrification, fully reduce nitrate concentration; in anoxic denitrification is constantly in the process of adding external carbon source, accelerate denitrification rate; in the aerobic degradation of organic matter and chemical precipitation step, the excess carbon source in the previous step fully removed, at the same time to reduce the processing time of chemical phosphorus.
【技术实现步骤摘要】
【国外来华专利技术】PCT国内申请，说明书已公开。
【技术保护点】
PCT国内申请，权利要求书已公开。
【技术特征摘要】
【国外来华专利技术】2015.07....
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