您好,欢迎访问三七文档
当前位置:首页 > 行业资料 > 其它行业文档 > 低负荷状态下CAST工艺脱氮特性的研究陈滨
2912010 2 四 川 环 境SICHUANENVIRONMENT Vol.29,No.1February2010··:2009-06-18::(FZ2008038);:(20071015)。: (1962-),,,1988,,。:,hzpxh20081228@sina.com。CAST陈 滨,许立群,周鹏飞,蒋福彤(, 212001) :在征润洲污水处理厂CAST工艺处理城市污水运行实践的基础上,开展了两个阶段的对比生产性试验;对城市污水处理过程中,低负荷运行状态下CAST工艺脱氮特性进行研究。研究结果表明:通过对F/M、DO、MLSS、SRT等工艺参数的优化控制,可实现同步硝化反硝化、短程硝化反硝化和传统硝化反硝化有机结合的耦合脱氮模式。该耦合脱氮模式下各出水水质指标稳定达标的情况下,出水NH3-N的去除率达到90%以上,出水TN去除率在55%以上,取得了良好的脱氮效果。 :CAST;;;;;:X703.1 :A :1001-3644(2010)01-0012-05StudyonNitrogenRemovalofCASTProcesswithLowLoadingCHENBin,XULi-qun,ZHOUPeng-fei,JIANGFu-tong(ZhenjiangControllingCompanyofWaterIndustry,Zhenjiang,Jiangsu212001,China) Abstract:OnthebasisofoperationexperienceoftreatingmunicipalsewagewithCASTprocess,twophasesofcontrastproductivetestswereconductedinZhengrunzhouSewageTreatmentPlant.ThecharacteristicsofnitrogenremovalinCASTprocesswithlowloadingratewerestudied.TheresultsshowedthatthroughoptimizingthetechnicalparameterssuchasF/M,DO,MLSSandSRT,couplingnitrogenremovalmodecouldbeachievedassynchronousnitrification-denitrification,shortcutnitrification-denitrification,andtraditionalnitrificationanddenitrification.Whentheeffluentqualityreachedthestandardstably,theremovalrateofNH3-NandTNweremorethan90%and55%respectively.Sothegoodeffectsofnitrogenremovalwereobtained.Keywords:CASTprocess;lowloadingrate;couplingnitrogenremovalmode;synchronousnitrificationanddenitrification;shortcutnitrificationanddenitrification;nitrobacteria CAST,,。,NH3-N、,。2007,,CAST,。20036,《》(GB18918-2002)B,NH3-N。,NH3-N;CAST,。1 试验情况介绍1.1 20m3/d;10m3/d;、,12.5m3/d,。,8CAST,2,4。4DOI:10.14034/j.cnki.schj.2010.01.002,/、、、4,1,。0.3,20%。1。1 Fig.1 Processflowdiagram1.2 CAST45×30m,6m,,,,。2。2 CASTFig.2 TheconfigurationdiagramofCASTreactor 4#CAST,:,MLSS2500~3500mg/L,12~15,DO2.5~3.5mg/L。,,;MLSS3500~4500mg/L,14~20,DO1.5~2.5mg/L。:CODCr:120~250mg/L;BOD5:30~100mg/L;NH3-N:15~28mg/L;TN:18~30mg/L;pH:7.0~8.2;:15℃~25℃。1.3 ;CAST,。、CODCr、BOD5、NH3-N、NO-3-N、TN、TP、pH。CAST,,20。CODCr、BOD5、NH3-N、NO-3-N、NO-2-N、TN。。2 试验结果讨论与分析 25,10,15。,,,。(:2-3)2.1 34。 ,NH3-N;8、,NH3-N。NH3-N5.16mg/L,74.79%,85.84%,3.6%。TN,17.00mg/L,25.85%;47.89%,-3.58%。NO-3-N8.02mg/L。 1~3,4。,8~11,NH3-N,NH3-N80%。NH3-N3.61mg/L,79.02%,95.5%,12.97%。TN131 :CAST,10.36mg/L,51.73%,64.69%,12.88%。NO-3-N3.84mg/L。2.2 NH3-N(F/M)。CAST,,,。8~10、7~10,F/M0.06KgBOD5/(KgMLSS.d);NH3-N。10F/M,NH3-N。5。5 Fig.5 Theweeklyvariationofnitrogenremovalandinfluentloading 4,F/M,,,。F/M,NH3-N。,F/MNH3-N。,4,F/M0.1KgBOD5/(KgMLSS.d),NH3-N90%。,CAST,F/M0.03~0.06KgBOD5/(KgMLSS.d),。2.3 DO,。DO、,。,,、BOD5、,。,,BOD5,DO,。,DO,DO,。,。、DO、。6。6 Fig.6 Thechartofaerationcontrol 5CAST,1#、3#、5#14 四川环境29,,2#、4#,。3#、5#,DO,;,DO,2#、4#,3#、5#,DO,。。:30DO0~0.5mg/L;30DO0.5~1.0mg/L。DO,,1.5~2.0mg/L,2.0~2.5mg/L,,。:,NH3-NTN。2.4 。。7。7 Fig.7 TheweeklyremovalvariationofnitrogenandTP 12~15,2500~3500mg/L。TP,1.46mg/L,63.11%。14~20,3500~4500mg/L。TP0.85mg/L,62.12%。,,14~17,3500~4000mg/L,,TP0.57mg/L,73.15%。,NO-3-N,8.02mg/L;,。,,,TP。,。3 低负荷状态下脱氮特性的探析3.1 ,,;,DO2.5~3.5mg/L,40。,NH3-N5.16mg/L,NO-3-N8.02mg/L,TN17.00mg/L。8。8 Fig.8 ThechartofallformsofnitrogenvariationinacycleofstageI 8:,NH3-NNO-3-N。NO-3-N,11.6mg/L。NO-2-N,,DO,,。:NH3-N。NH3-NNO-2-N。,NO-2-NNO-3-N。,[1],NO-2-NNO-3-N;,NO-2-NNO-3-N。,NO-3-N,TN。,NH3-N,TN。3.2 ,,,:151 :CAST、、、。:0.03~0.06kgBOD5/kgMLSS;MLSS3500~4500mg/L,DO1.5~2.5mg/L,20。,NH3-N3.61mg/L,NO-3-N3.84mg/L,TN10.36mg/L。9。9 Fig.9 ThechartofallformsofnitrogenariationinacycleofstageII 9:,NH3-NNO-2-N,;DO,NO-2-NNO-3-N,。,DO,NO-2-NNO-3-N。,;3.58mg/L2.23mg/L,1.6。,,、、,。[2]:,DO。,;DO,,,,。,,,;DO[3]。NO-2-N,NH3-NNO-2-N,;。NO-2-NNO-3-N,。:,,、、。CAST,。,;NH3-N、TN。,NH3-N90%、TN55%。4 结 论4.1 CAST,。,、。,NH3-N90%,99%;TN55%。4.2 CAST,:0.03~0.06KgBOD5/(KgMLSS.d);14~20;MLSS3500~4500mg/L;,。。4.3 。CAST,、;,。30DO0~0.5mg/L,30DO0.5~1.0mg/L。DO1.5~2.5mg/L。,,。4.4 、CAST。,14~17、3500~4000mg/L、CAST;TP73.15%。:[1] ModinO,FukushiK,YamamotoK.Denitrificationwithmetha-neasexternalcarbonsource[J].WaterResearch,2007,41(12):2726-2738.[2] ,,.[J].,2008,26(6):905-906.[3] .[J].,2009,3(1):23-26.16 四川环境29
本文标题:低负荷状态下CAST工艺脱氮特性的研究陈滨
链接地址:https://www.777doc.com/doc-6553518 .html