CASS工艺处理高氨氮污水的脱氮设计李颖

Vol.32No.520065CASS工艺处理高氨氮污水的脱氮设计李颖郭爱军赵国华(,100044)重点介绍了改进的CASS工艺处理高氨氮污水的脱氮设计和运行参数,如C/N回流比DO曝气时间和控制方式等的变化对脱氮效果的影响,并在此基础上给出了各参数的设计计算方法随后的试验研究表明,改进的CASS工艺克服了传统设计的不足,在有效去除水中有机物的同时,脱氮效果良好CASS工艺高氨氮污水脱氮污泥负荷法设计改进0CASS,,CASS,,:(),CASS;CASS,,CASS,,CASS,,CASS,CASS1CASS3:CASS,,MLSSDO,,,,,DOCASS,,,,,,5%,,,,,CASS,,2CASS2.1CASS(1)CASS,,,,参考文献1,,,..,2005,31(10):10~13:200092901:[phone]Email:xu_jjgp1@smedicom:20051223:200603036Vol.32No.52006,,,,,(2),,(3),,(4)2.2,,:(1):N,max=047e0098(T-15)(1)N,max,d-1;T,(2):N=N,maxNKN+N(2)N,d-1;NNH3-N,mg/L;KN,1mg/L(3):mC=1/N(3)mC,d(4)dC:LawrenceMcCarty(SF),SF:SF=dC/mC(4)dC,dSFpHDO1.5~3(5)VSS(COD):X1=YH1+bHdC(Si-Se)dCt(5)X1,mg/L;YH,gVSS/gCODgVSS/gBOD;bH,d-1;Si,mgCOD/LmgBOD/L;Se,mgCOD/LmgBOD/L;t,d;YH1+bHdCYH,NET:qH=Si-SeX1t(6)qH,d-1:1/dC=YH,NETqH(7)VSS3:VSS:X=YHS1+bdCdCt(8)XVSS,mg/L;S,mgCOD/LmgBOD/L;YHVSS,gVSS/gCODgVSS/gBOD;bVSS,d-1VSS(X):1/dC=YH,NETqOBS(9)qOBS,d-1(6)t:t=Si-SeXqOBS(10)(7):Vol.32No.520067VN=Qt(11)VN,m3;Q,m3/d(8):FM=QSiVNX(12),F/M0.18~0.25kgCOD/(kgMLSSd),,(9):SNR=QNVNX(13)NNO-3-NTKN,mg/L,SNR0.045kgNH3-N/(kgMLSSd),,2.3,:(1)SDNR:20:SDNR(20)=0.3F/M+0.029(14)T:SDNR(T)=SDNR(20)(T-20)(15)SDNR(T),kgNO-3-N/(kgMLSSd);F/M,kgCOD/(kgMLSSd)(2)MLVSSLA:LA=QND/SDNR(T)(16)LAMLVSS,kg/d;Q,m3/d;NDNO-3-N,kgN/d(3)VAN:VAN=1000LA/X(17)VAN,m3(4)tA:tA=VAN/Q(18)tA,h(5):=dC+dCVANVN=dC1+VANVN(19),d2.4CASS,,,,,vS:vS=650/(XTSVI)(20)vS,m/h;XT,g/L,3~4.2g/L;SVI,mL/g,HS,H+HS,(ts+td-10/60)h,:vS(ts+td-10/60)=H+HS(21)H,,m,H40%,,2~2.2m;ts,h;td,h(20)(21):HS+V/A=650AHTXTSVI(tS+td-10/60)(22)V,m3;A,m2;HT,mtstd,SVI,HS0.6~0.9mV,(22)HTAHTA:HT,(22)A,H=V/A,,,HTA,8Vol.32No.52006HB:HB=HT-H=HT-V/A(23)MLSSXT,MLSS:XB=XTHT/HB(24)MLSS6kg/m32.5L=Xe(VAN+VN)/(25)LVSS,kg/d;XeVSS,mg/L2.6(1):,1kgBOD1~1.3kg,1.1kg,O1:O1=1.1[Q(Si-Se)/1000](26)(2)O2:O2=QN/1000(27)(3)1kgNO-3-N2.9kgBOD,BOD,O3:O3=2.9NDQ/1000(28)O:O=O1+O2-O3(29)3(1)C/N,C/N5,,65%;C/N5~9,,;C/N9,87%(2)C/N5,HRT,0.18~0.25kgCODCr/(kgMLSSd),NH3-N0.045kgNH3-N/(kgMLSSd),94%,60%~70%(3),0.17kgCOD/(kgMLSSd),50%250%,,150%(4)DO,DO1.4mg/L,DO2.5~3.5mg/L(5),,CASS,,(6)CASSDONH3-N,,参考文献1..:,20022.SBR.:,20033,..:,20014,..:,19895,..,1999,15(5):20~216,.SBR.,1998,24(4):6~11:100044:[phone]:20051031美国国家标准虹吸雨水斗发布(ASME)A11269200520059,,,(通讯员范懋功)