高浓度氨氮对IC厌氧反应器运行的抑制性研究于芳芳

2　4环境工程学报Vol.2,No.420084ChineseJournalofEnvironmentalEngineeringApr.2008IC于芳芳　伍健东　周兴求　牛晓君(,510006)　　(35±1)℃,,IC。,3036mg/L,,,IC504500mg/L;VFA400mg/L,pH7.21～7.622356～3065mg/L;12.67%。,7dCOD93.01%;VFA,6d152～162mg/L;pH1769～2298mg/L7.09～7.27,。　　IC　　X703.1　　　A　　　1673-9108(2008)04-0498-04EffectofammoniumonoperationofinternalcirculationreactorYuFangfang　WuJiandong　ZhouXingqiu　NiuXiaojun(CollegeofEnvironmentalScienceandEngineering,SouthChinaUniversityofTechnology,Guangzhou510006)Abstract　Theeffectofammoniumontherunningofinternalcirculationreactorwasstudiedtakingglucoseasorganiccarbonsourceundermesophilicconditions(35±1)℃.Theexperimentalresultsshowedthatwhentheconcentrationofammoniumwashigherthan3036mg/L,therunningofICreactorwasinhibited,thecorre-spondingIC50was4500mg/L,andtheeffectofinhibitionbecameevidentwiththeconcentrationofammoniumincreasing.Duringthewholeoperation,VFAofeffluentwaslowerthan400mg/L,pHandalkalinitywerestabi-lizedat7.21～7.62,2356～3065mg/L,respectively.Theaverageremovalrateofammoniumwas12.67%.Inthetoxicityrecoveryexperiment,theremovalrateofCODwasrecuperatedto93.01%after7days,anddur-ingtheperiodofrecuperation,theVFAofsystemwasgraduallyreducedandstabilizedat152～162mg/Lfromthesixthday,thealkalinityandpHwerealsostabilizedat1769～2298mg/L,7.09～7.27,respectively.Thewholesystemrunstably.Keywords　ammonium;internalcirculationreactor;operationcharacteristic:2007-10-31;:2007-12-26:(1982～),,,。E-mail:[e-mail]　　、、[1],、、、、、,、、。。pH,。(、、pH),IC50(1000～4500mg/L)[2～6]。IC、、,,,。,35℃IC,,IC。1　1.1　IC、,4:IC。,120mm,1200mm,12L,0.2m/h,HRT6h。,(35±1)℃。1,、、、IC、。1.2　,,C∶N∶P200∶5∶1,(NH4Cl),Fe、Co、Ni(1),NaHCO3。1　Fig.1　Schematicdiagramofapparatus1　Table1　Compositionandcontentoftraceelements(mg/L)(mg/L)CaCl2330MgSO4500EDTA5000CuSO4·5H2O250NiCl2·6H2O190CoCl2·6H2O240H3BO414MnCl2·4H2O990ZnSO4·7H2O430NH4MoO4·4H2O91.3　3UASB,UASB。IC4.5L,1/3。:37.6m/h,SS35.8g/L,VSS/SS87%,92%,0.5～3mm。1.4　COD:[7];pH:[7];:[7];VFA:;:[7]。2　IC。,COD。43d,COD10000mg/L,55.4kgCOD/(m3·d),HRT4.1h,COD92%,pH6.8～7.2,。2.1　ICIC,37kgCOD/(m3·d)IC。,COD9000mg/L,HRT5.4h,,IC。2.1.1　氨氮浓度对COD去除率及产气率的影响2,2548mg/L,COD92.3%,3036mg/L,COD85.13%,,,4535mg/L,COD49.92%,IC,3000mg/L。2　CODFig.2　EffectofammoniumonremovalrateofCODandgasproductionrate2,CH4,2548mg/L,CH4,2458mg/L3036mg/L,,17.01L/(L·d)13.26L/(L·d),,,49924535mg/L8.43L/(L·d)。2,ICIC504500mg/L。2.1.2　氨氮浓度对系统VFA的影响VFA,VFApH,ORP,,VFA400mg/L。VFA,,[8]。3VFA。3,1000mg/L4532mg/L,VFA185～345mg/L,400mg/L。ICVFA,。Koster[9]4050～5730mg/L,56%。3　VFAFig.3　EffectofammoniumconcentrationonVFAofsystem2.1.3　氨氮浓度对pH值和碱度的影响pH,pHpH(6.8～7.2)(4),7.21～7.62,pH。2543～2932mg/L,2356～3506mg/L,,,。2.1.4　反应器对氨氮的去除,:,,[10,11]。,,,4　pHFig.4　ChangesofinfluentandeffluentpHandalkalinity。:IC,,12.67%(5)。5　Fig.5　Removalofammonium2.2　,,IC。,,COD9000mg/L,C∶N∶P200∶5∶1。,1dCOD69.04%82.63%,9dCOD93.01%(6)。VFA,6d152～162mg/L(7);pH,1769～2298mg/L7.09～7.27(8),。IC,,,、,2。2,,,14.4～79.8m/h,0.5～2mm,。5004:IC3　Table3　Changesofsizeandsettlingvelocityofgranularsludge(mm)(m/h)(%)(m/h)(%)389.79.979.87.82～375.411.864.89.61～246.850.143.248.50.5～128.822.129.023.20.25～0.514.42.114.44.60.25—4.0—6.3,,,,、,、。3　　(1)ICCOD9000mg/L,3036mg/L,,,ICIC504500mg/L。(2)IC,VFA400mg/L,pH7.21～7.62,2356～3065mg/L。ICVFA、pH。(3),,C∶N∶P200∶5∶1,7dCOD93.01%,VFA,6d152～162mg/L,pH1769～2298mg/L7.09～7.27,。[1]..:,1998.79～81[2],..,2001,21(6):47～50[3],,..(),2005,45(9):1294～1296[4]BorjaR.,SanchezE.,WeilandP.Influenceofammoniaconcentrationonthermophilicanaerobicdigestionofcattlemanureinupflowanaerobicsludgeblanket(UASB)reac-tors.ProcessBiochemistry,1996,31(5):477～483[5]SossaK.,AlarconM.,AspeE.,etal.Effectofammoniaonthemethanogenicactivityofmethyllaminotrophicmeth-aneproducingarchaeaenrichedbiofilm.Anaerobe,2004,(10):13～18[6]GerardiM.H.TheMicrobiologyofAnaerobicDigesters.Hoboken,NewJersey,USA:JohnWileyandSons,2003[7]《》.().:,1989[8],,,.UASBVFA.,2005,24(1):71～73[9]KosterI.W.,LettingaG.Anaerobicdigestionatextremeammoniaconcentrations.Biol.Wastes,1998,25:51～59[10],.IC.,2001,19(2):12～15[11],,.IC.,2004,23(4):777～781501