垃圾渗滤液与城市污水同时处理系统优化运行策略探讨_石明岩
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2020-05-04 00:23:05
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第一作者:石明岩,女,1972年生,博士后,副教授,研究方向为水污染控制。*广东省科技计划重点引导项目(No.2010B010900038);广州市科技计划项目(No.2007J1-Q411);广州大学新苗计划项目(No.20071002)。垃圾渗滤液与城市污水同时处理系统优化运行策略探讨*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,广东广州510006;2.广州市大坦沙污水处理厂,广东广州510163)摘要采用倒置A2/O工艺处理垃圾渗滤液与城市污水的混合污水。模型试验结果表明,水力停留时间是影响混合污水氮和有机物去除的控制因素;水温为23~30℃、泥龄为20d时,最优运行参数为:水力停留时间9h、DO2mg/L、外回流比80%、内回流比200%,此时COD、NH3-N和TN去除率分别为76.4%~78.2%、95.7%~97.8%和58.9%~61.2%,出水浓度均可稳定达到《城镇污水处理厂污染物排放标准》(GB18918—2002)一级A标准。当水温为13~27℃,其他工艺条件与模型试验相同时,生产性试验得出,COD、NH3-N和TN去除率分别为74.7%~87.8%、87.2%~98.6%、51.8%~67.4%;出水COD和NH3-N均达到GB18918—2002一级A标准,出水TN达到GB18918—2002一级B标准。与上一年同期运行效果比较,NH3-N和TN平均去除率分别提高了9.4、9.9百分点,有机物去除没有改善。关键词倒置A2/O工艺垃圾渗滤液城市污水水力停留时间脱氮有机物OptimizationoperationofsimultaneoustreatmentoflandfillleachateandurbansewagebyinversionA2/OprocessSHIMingyan1,FENGZhaoji1,YUJianheng2,XIAGengdong2.(1.SchoolofCivilEngineering,GuangzhouUniversi-ty,GuangzhouGuangdong510006;2.GuangzhouDatanshaSewageTreatmentPlant,GuangzhouGuangdong510163)Abstract:TheinversionA2/Oprocesswasappliedforsimultaneoustreatmentoflandfillleachateandurbansewage,andorthogonaltestwereconductedtofindouttheoptimizationoperatingcondition.Modelexperimentshowedthatthehydraulicretentiontime(HRT)wasthekeyfactorofnitrogenandorganicremoval.Whenwatertemperatureranged23-30℃,optimaloperationparameterswereHRT9h,DO2mg/L,refluxrate80%,andinnercyclemixedliq-uidrate200%,undertheseoptimizeconditions,COD,NH3-NandTNremovalrateinmodelwere76.4%-78.2%,95.7%-97.8%and58.9%-61.2%respectively.TheeffluentwassteadilyreachedtostandardAof“DischargeStand-ardofPollutantsforMunicipalWastewaterTreatmentPlant”(GB18918-2002).Whenwatertemperatureranged13-27℃andapplyingtheobtainedoperatingparameter,COD,NH3-NandTNremovalrateinproductiveexperimentalwere74.7%-87.8%,87.2%-98.6%,and51.8%-67.4%respectively.EffluentCODandNH3-NwasqualifiedtolevelAofGB18918-2002,andeffluentTNwassatisfylevelBofGB18918-2002.Comparedwiththerunningeffectofsameperi-odatusual,NH3-NandTNaverageremovalratewasincreaseby9.4%and9.9%respectively.Keywords:inversionA2/Opr
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