欢迎来到天天文库
浏览记录
ID:50376364
大小:244.95 KB
页数:5页
时间:2020-03-05
《生物淋滤_PAC与PAM联合调理城市污泥.pdf》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、第31卷第9期环境科学Vol.31,No.92010年9月Sep.,2010ENVIRONMENTALSCIENCE生物淋滤-PAC与PAM联合调理城市污泥1,23*1,21,2刘昌庚,张盼月,曾光明,刘勇刚(1.湖南大学环境科学与工程学院,长沙410082;2.湖南大学环境生物与控制教育部重点实验室,长沙410082;3.北京林业大学环境科学与工程学院,北京100083)摘要:采用生物淋滤-聚合氯化铝(PAC)与聚丙烯酰胺(PAM)联合使用工艺对城市污泥进行了调理研究.结果表明,在固定单-1-1
2、质硫投量为3g·L的条件下,投加亚铁离子能明显加快污泥生物淋滤速率;FeSO4·7H2O投量为8g·L时,污泥pH降至2约102-1102-1需1.5d.生物淋滤显著改善了污泥的脱水性能,生物淋滤后使污泥比阻从6.45×10s·g降到1.45×10s·g,降低了77.52%,但污泥仍属于难脱水污泥.回调淋滤污泥pH至6,投加PAC及PAM对淋滤污泥进行强化调理.结果表明,单独使用-1-1PAC与PAM的最佳投量分别为200mg·L和50mg·L;联合使用PAC与PAM时,PAC与PAM的最佳投量分
3、别为100-1-182-1mg·L和25mg·L,污泥比阻和滤饼含水率分别为2.02×10s·g和74.81%,污泥属于易脱水污泥.与单独使用PAC与PAM相比,PAC与PAM联合使用调理污泥费用低、处理效果好.关键词:城市污泥;生物淋滤;PAC;PAM;脱水性能中图分类号:X705文献标识码:A文章编号:0250-3301(2010)09-2124-05SewageSludgeConditioningbyBioleaching-DualPACandPAMAddition1,231,21,2LIU
4、Chang-geng,ZHANGPan-yue,ZENGGuang-ming,LIUYong-gang(1.CollegeofEnvironmentalScienceandEngineering,HunanUniversity,Changsha410082,China;2.KeyLaboratoryofEnvironmentalBiologyandPollutionControl,MinistryofEducation,HunanUniversity,Changsha410082,China;3.
5、CollegeofEnvironmentalScienceandEngineering,BeijingForestryUniversity,Beijing100083,China)Abstract:Bioleaching-dualpolyaluminumchloride(PAC)andpolyacrylamide(PAM)additionwasusedtoconditionsewagesludge.-1TheresultsshowedthatFeSO·7HOadditionimprovedtheb
6、ioleachingrateobviouslywithafixedsulfurpowerdosageof3g·L;42-1whentheFeSO·7HOdosagewas8g·L,thebioleachinglasted1.5dtodecreasethesludgepHbelow2.Bioleachingimprovedthe42102-1sludgedewaterabilitysignificantlywithaspecificresistancetofiltration(SRF)reducti
7、onof77.52%from6.45×10s·gto1.45×102-110s·g,butthebioleachedsludgewasstilldifficulttobedewatered.AfteradjustingthebioleachedsludgepHto6,PACandPAM-1wereusedtoenhanceconditioningofthebioleachedsludge.Theresultsindicatedthattheoptimaldosagewas200mg·LforPAC
8、or-150mg·LforPAMwhensinglechemicalwasused.WhenPACandPAMwereduallyused,theoptimaldosagesofPACandPAM-1-182-1were100mg·Land25mg·L,respectively;SRFandmoistureofsludgecakereducedto2.02×10s·gand74.81%,respectively,showinggooddewaterabilityofthetreat
此文档下载收益归作者所有