吹脱法去除垃圾渗滤液中的氨氮研究王文斌

王文斌　董　有(,430081)　　　　　刘士庭(,455000)　　,、pH。25℃,3500,pH10.5,2000～4000mg/L,90%。　　　　AirstrippingtoremoveammonianitrogeninlandfillleachateWangWenbin　DongYou(WuhanSafetyandEnvironmentalProtectionInstitute,Wuhan430081)LiuShiting(EnvironmentalProtectionAgencyofAnyangCounty,HenanProvince,Auyang455000)Abstract　Airstrippingwasadoptedtotreatleachateofrefuselandfillyardforammonianitrogenre-movalinourstudy.Thekeyfactorsinammonianitrogenremovalweretemperature,air-liquidratioandpH.Inconditionwhentemperaturewas25℃,air-liquidratiowasinrangeofabout3500,andpHwascontrolledin10.5,over90%ofammonianitrogenwasremovedbyairstripping.Keywords　airstripping;air-liquidratio;ammonianitrogen;landfillleachate:2003-07-15;:2003-09-23:(1973～),,,:。E-mail:[e-mail]　　、。,,。[1],100mg/L,。,。,800～4000mg/L,,。[2～4],。K.C.Cheung[4],,。,、、pH、。1　,1。,1　Fig.1　ExperimentalflowchartpH。pH,pH,。。0.3m,2,3m,5m。≥330m3/h,≥0.001MPa。,,,,,,,。,56Vol.5,No.620046TechniquesandEquipmentforEnvironmentalPollutionControlJun.2004pH,。:COD,5000～10000mg/L;BOD,2000～5000mg/L;,800～4000mg/L;pH,7.6～8.1;,250mg/L。《》[5],:COD,;NH3-N,;pH,;,。2　2.1　、pH,。:NH3+H2O=NH+4+OH-pH,pH,,。,,。pH7.6～8.1,10.0～11.0,。pH2,,pH。12g/L,pH11.3。2　pHFig.2　TherelationbetweenpHandtheamountofCaCO3inputted25℃,28623587,pH。28623587,3。2862,pH9～10,pH,。pH10,。pH,。3587,pH,。pH11,。,CaCO3,。,,。,pH10.5。3　pHFig.3　TheeffectofpHontheremovalefficiencyofammonianitrogen2.2　pH10.5,25℃,,,4。,,,。3000,90%。3800,。,3000～3800。4　Fig.4　Theeffectofgas-liquidratioonremovalefficiencyofammonianitrogen2.3　、,pH,pH11,3500。,,,1。1:,,。25～28℃,pH10.5,3700～4000,4h,6h8h,2。5256h,90%。1　Table1　TherelationbetweenconcentrationofNH3andtheefficiencyofNH3removal(mg/L)(mg/L)(%)455710197.8395112796.8358711296.9286210896.32　Table2　TherelationbetweendetentiontimeandtheefficiencyofNH3removal(h)(mg/L)(%)43500～400065～8364000～4500≥9084000～4300≥932.4　13～29℃,16～34℃。pH10.5,3500,。25℃,90%～96%;20℃,76%～85%;16℃,65%～73%。,30℃,,。40℃,;,40℃,。。2.5　COD,,COD,3,pH,,COD。3　　,:3　CODTable3　TherelationbetweenCODlevelchangeandtheremovalefficiencyofCODCOD(mg/L)COD(mg/L)(%)8015713011.07639677411.3648358339.0(1)、pH。30℃,,。25℃,3000～3800,pH10.5,90%。(2)pH7.6～8.110.0～11.0,10～13g/L。1.5mL/L(pH)。(3),。(4),,COD,。:,。:;;。[1],,..,2002,28(12):12～14[2]..:,1987[3],..:,1998[4]K.C.Cheung,etal.Ammoniastrippingasapretreatmentforlandfillleachate.Water,AirandSoilPollution,1997,94:209～221[5]《》..:,1997536: