Analysis of the Effectiveness of A/O and A2/O Processes in Treating Urban Wastewater
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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