不同流量分配对三段进水A/O生物膜工艺的影响试验研究

不同的进水流量分配对多段进水A/O生物脱氮工艺的脱氮效率有明显影响,为提高多段进水A/O生物膜脱氮工艺的脱氮效率,本研究试验了两种不同流量分配下三段进水A/O生物膜脱氮工艺对污染物的去除效率。研究结果表明：当进入缺氧单元分配的进水中可生物降解COD量与进入该单元的硝态氮量的比值（用α表示）分别为4 mgCOD/mgNO3-N和7 mgCOD/mgNO3-N进行流量分配设计时,三段进水A/O生物膜脱氮工艺对COD、氨氮和总氮的去除效率分别为94.85%、99.62%、75.81%和96.71%、98.84%、78.42%;α等于7mgCOD/mgNO3-N时工艺的总氮去除效率略高于α等于4 mgCOD/mgNO3-N时的总氮去除效率。

Experimental Study of influent flow distribution on three sections feed A/O biofilm process

Influent flow rate distributions have significant effects on the total nitrogen（TN） removal efficiencies of step feeding A/O biological nitrogen removal process.In order to improve the total nitrogen removal efficiency of the step feeding A/O biofilm nitrogen removal process,the influent flow rate of the process was distributed according to the biodegradable chemical oxygen demand（bCOD） amount to nitrate amount ratio of the influent injecting into the anoxic unit（,mgCOD/mgNO3-N） and removal efficiencies of a three-step feeding biofilm nitrogen removal process to contaminants were studied under two different influent flow rate distributions.The results indicated that,when equaled to 4 mgCOD/mgNO3-N and 7 mgCOD/mgNO3-N respectively,removal efficiencies of the three-step feeding A/O biofilm nitrogen removal process to COD,ammonia nitrogen and TN were 94.85%、99.61%、76.5% and 96.71%、99.84%、78.54%;When equaled to 7 mgCOD/mgNO3-N,the TN removal efficiency of the process was a little higher than that of 4mgCOD/mgNO3-N.