倒置A2-O法处理混合污水去氮除碳研究

倒置A2-O法处理混合污水去氮除碳研究倒置A2/O法处理混合污水去氮除碳研究＊石明岩1冯兆继1余建恒2夏耿东2(1.广州大学土木工程学院广州510006;2.广州市大坦沙污水处理厂广州510163)摘要采用倒置A2/O法同时处理城市污水与渗滤液去氮除碳。结果表明,当渗滤液混入量较低时,对城市污水碳源基本不构成影响;水力停留时间是最显著影响因子;理论最佳工况是:水力停留时间为9h,溶解氧质量浓度为2mg/L,外回流比为0.8,内回流比为2。此时,COD、NH3-N和TN浓度均可稳定地达到《城镇污水处理厂污染物排放标准》(GB18918-2002)一级A标准,平均去除率分别为77.4%、97.2%和62.4%。关键词倒置A2/O法城市污水渗滤液去氮除碳ResearchonNitrogenandCarbonRemovalofMixedWastewaterTreatmentbyReversedA2/OSHIMingyan1FENGZhaoji1YUJianheng2XIAGengdong2(1.SchoolofCivilEngineering,GuangzhouUniversityGuangzhou510006)AbstractReversedA2/Oprocessisusedtotreatmunicipalwastewaterandnitrogenandcarbonremovalintheconsolidatedtreatmentoflandfillleachate.TheresultsshowthatHRTisthekeyfactorfornitrogenandorganicremovalefficiencybyorthogonalexperiment.InconditionsofHRT9h,DO2.0mg/L,R80%,r200%,theeffectoforganicandnitrogenremovalachievestheoptimalsynchronizationandtheaverageremovalrateofCOD,NH3-N,TNcanreach77.4%,97.2%and62.4%respectively,meanwhiletheeffluentconcentrationcanalsoreachstandardlevelAof“Dischargestan