摘要
本文采用A/O工艺和A2/O工艺对城市生活污水进行处理,分析对比了两种工艺对COD、氨氮、总氮、总磷的去除效果,重点研究了温度、进水ρ(C)/ρ(N)、进水ρ(C)/ρ(P)对废水中COD去除效果的影响,结果表明:在相同条件下,采用A2/O对城市生活污水中COD、氨氮、总氮、总磷的去除效果要明显优于A/O工艺.在废水COD的去除过程中,A2/O工艺受温度、ρ(C)/ρ(N)和ρ(C)/ρ(P)的影响较小,对COD的去除率整体都在85%以上.但是A/O工艺受温度、ρ(C)/ρ(N)和ρ(C)/ρ(P)变化的影响,COD的去除率随着温度的升高呈现先减小后增加的趋势,随ρ(C)/ρ(N)的增加而逐渐下降,随ρ(C)/ρ(P)的增加呈现先增加后降低的趋势,且对COD的整体去除率低于85%.
Abstract
This article uses A/O and A2/O processes to treat urban domestic sewage,analyzes and compares the removal effects of the two processes on COD,ammonia nitrogen,total nitrogen,and total phosphorus,and focuses on the effects of temperature,inlet ρ(C)/ρ(N),and inlet ρ(C)/ρ(P)on COD removal in wastewater.The results show that under the same conditions,the removal effect of COD,ammonia nitrogen,total nitrogen,and total phosphorus in urban domestic sewage using A2/O is significantly better than that of A/O process.In the process of removing COD from wastewater,the A2/O process is less affected by temperature,ρ(C)/ρ(N),and ρ(C)/ρ(P),and the overall COD removal rate is above 85%.However,the A/O process is affected by temperature,ρ(C)/ρ(N),and ρ(C)/ρ(P)changes.The COD removal rate shows a trend of first decreasing and then increasing with the increase of temperature,and gradually decreasing with the increase of ρ(C)/ρ(N).The ρ(C)/ρ(P)shows a trend of first increasing and then decreasing,and the overall COD removal rate is less than 85%.
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