SBR法去除有机物硝化和反硝化过程中pH变化规律高景峰

SBR、pH＊高景峰　彭永臻　王淑莹(,100022)　为实现SBR法脱氮在线模糊控制,以啤酒废水为研究对象,通过不同进水氨氮浓度和不同进水有机物浓度的试验,研究了SBR法去除有机物、硝化和反硝化过程中pH的变化规律。试验结果表明在有机物去除过程中pH呈现大幅上升的现象;有机物去除结束时pH停止上升,随着硝化反应的进行pH不断下降直至反应结束,然后pH突然快速上升或维持不变。在反硝化过程中,pH不断上升直至反硝化结束出现转折点,然后持续下降,指示反硝化已经结束。不同进水氨氮浓度和进水有机物浓度的试验进一步验证了pH特征点的重现性,可以作为SBR法去除有机物、硝化和反硝化的模糊控制参数。　SBR　pH　硝化　反硝化　模糊控制　　　　　　　　＊(59878016);(8002005)1　,,N2,。(SequencingBatchReactor,SBR),,(ASM1、23)。,、。、,pHSBR,SBR。2　1。70cm,30cm,38L,,。pH,pH。,,(NH4CL)(KH2PO4)、,(NaCHO3)pH。30℃,0.8m3h。,SBR:1　SBR1—ORP;2—ORP;3—pH;4—pH;5—;6—DO;7—;8—;9—;10—;11—;12—;13—;14—;15—。,(、),(),N2。:、,MLSS=8000mgL,CODCr(CODCr)300～330mgL,,pH,(),2:80～85mgL,110～120mgL,pH;,24,,pH;21　　　200110195DOI:10.13205/j.hjgc.2001.05.006,,3,SBRpH。3　3.1　pH在SBR法一个反应周期中的变化规律113mgL,2,3。SBR,pH:CODCrpH7.2120min7.85,(1):,(1),(2),CO2,CO2pH,CO2,pH;(2)pH。CXHYOZ+(x+y4-z2)O2※xCO2+y2H2O(1)nCXHYOZ+nNH3+n(x+y4-z2-5)O2※(C5H7NO2)n+n(x-5)CO2+y2(y-4)H2O(2)2　113mgL,,,,CODCrCODCr(2A),pH(3A),7.85,H+,(3)。NH+4+32O2※NO-2+H2O+2H+(3)pH140min6.88,(2B),,pH(3B)。pH,CO2;pH,。,pH。,pH:7.2620min3　113mgL,pH9.16。,,(4)、(5)。。(2C),pH,(3C),:9.16。pH,,、,。SBR。pH。NO-2+3H()※12N2+H2O+OH-(4)NO-3+5H()※12N2+2H2O+OH-(5)3.2　pH导数图形分析2,3pH,4。4CODCr,pH(4A)(4B),pH(4C)。pH,pH、。3.3　冲击氨氮浓度的试验结果与分析,8000mgL,:48mgL,80mgL,156mgL,184mgL。,pH。5～10。pH22　　　2001101954　pH-5　48mgL,pH6　80mgL,pH7　156mgL,pH,:5～10,pH2(A,B)(C),8　184mgL,pH9　SBR10　SBR。5～10:CODCr,。:0.0045～0.00606mgNH+4-N(mgMLSS·h),0.09mgCOD(mgMLSS·h)。,CODCr20～25min,pHCODCr。48mgL,80mgL,156mgL,80min,120min,215min,pH23　　　20011019580min215min,,,。184mgL(8),214min,pH(B),,17mgL,,8156mgL,。48mgL,80mgL,184mgL,8min,16min,20min,0.0216～0.0323mgNO-X-N(mgMLSS·h)。156mgL(7)55min,,pHpH,,,pH,,。,0mgL,。3.4　冲击有机负荷的试验结果与分析3,113mgL,CODCr308mgL(2,3),493mgL738mgL(11～12),,pHSBR。11　CODCr493mgL,pHCODCr,pH,,pH1A25,12　CODCr738mgL,pH30,60min,pH2B140,240,360min。,CODCr,。CODCrN,,,。CODCr,,,,CODCr302mgL,CODCr1.6,2.4,,1.7,2.6。CODCr。4　(1)pHCODCrCODCr,,pH,pH,。,pH,,pH,pH,,,。(2)pH。pH。pH。,pH。　,,19741,,。。:。2001-03-0124　　　200110195rate.Theelectrolysisbathofactivatedcarbonfixed-bedismoreadvantageousinsavingenergy.Keywords　activatedcarbon,fixed-bedelectrodeandelectrolysisbathLAWOFCHANGESINpHDURINGPROCESSESOFNITRIFICATION,DENITRIFICATIONANDORGANISMREMOVALBYSBRGaoJingfengetal(21………………………………………………………)Abstract　InordertoachievefuzzycontrolofdenitrificationinSequencingBatchReactor(SBR)beerwastewaterwastreated.ThroughnitrogenshockloadingandorganicshockloadingexperimentationswehavestudiedtherelationshipbetweenpHandorganicmatterdegradation,nitrificationanddenitrification.Duringthedegradationoforganicmatter,pHincreasesquickly.DuringnitrificationpHdecreases.Whenammoniastopsdegrading,pHincreasesquicklyorthenmaintainsthesamevalue.Duringdenitrification,pHincreasestilldenitrificationstops,thendecreases,showingaturningpoint.NitrogenshockloadingandorganicshockloadingexperimentationsandthederivativecurveverifythereproducibilityofpHcharacterishicpointsandcouldbeusedasprocesscontrolparameters.Keywords　SBR,pH,nitrification,denitrificationandfuzzycontrolSTUDYOFTREATINGWASTEWATEROFACIDRED3BDYEWITHCOALASHADSORPTIONZhangJinlietal(25…………………………………………………………………………………………………)Abstract　Theadsorptivecharacteristicsofacidred3Bincoalasharedeterminedbyexperiments.Theisothermalex-pressionofadsorptioninpH=6.8andat25℃isobtainedbystudyingtheeffectsoftheadsorptivetemperature,thesizeofthecoalashandpHofthesolutionontheadsorptiveisotherm.Theinfluencelawofthetreatingquantity,dyeconcentrationandparticlesizeonthepenetrationtimeofacoalashfixedbedisalsoexamined.Keywords　adsorption,dyewastewaterandcoalashEXPERIMENTALSTUDYOFFLUEGASDESULFURIZATIONBYATHREE-PHASEFLUIDIZEDREACTORZhongZhaopingetal(27………………………………………………………………………………)Abstract　Onthebasisofagreatnumberofinternationalanddomesticreportsonwetfluegasdesulfuration,thispaperpresentsaprocesscalleddesulfurziationbyathree-phasefluidizedreactorwithlime-slurrywhichissuitableforboilersinChina.Atestfacilityofthermalstatewiththefluegascapacityof2000Nm3hisdesignedandbuilt.Alotofexperimentsiscarriedout.Theresultsindicatedthatthedesulfurizationefficiencyincreasedwiththegrowthofconcentrationoflime-slurryandimmergeddepthofthebubblingpipeundertheslurry.WhenpHvalueis5～8,theimmergeddepthofbubblingpipeundertheslurryis160～200mm,thejetrateis10～25ms,theconcentrationofslurryis7%,thetemperatureis55～60℃andagitationisappliedinreaction,thedesulfurizationefficiencymaybeover95%.Keywords　fluidization,fluegasdesulfurization,lime-slurryandexperimentalstudyEXPERIMENTALSTUDYONTHETREATMENTOFSO2-BEARINGGASBYMICROORGA-NISMSZhangYongkuietal(30………………………………………………………………………………………)Abstract　ThispaperdescribesanewdesulphurizationprocesswithThiobacillusferrooxidant.Theeffectsofthecon-centrationofferricinos,theratioofliquidtogasandtheconcentrationofSO2etconthedesulfurationefficiencyhavebeenstudied.Comparedwiththemethodofdilutedsulfurousacidabsorption,theabilityofdesulphurizationbythebacterialsolu-tionismoreefficient.Notonlytheferricinos,butalsothebacterialcellsplayakeyroleforSO2removal.Suchresults3ENVIRONMENTALENGINEERINGVol.19,No.5,October,2001