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《利用污泥熟肥作为高含水率污泥堆肥调理剂-论文.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第7卷第6期环境工程学报Vo1.7.No.62013年6月ChineseJournalofEnvironmentalEngineeringJun.2013利用污泥熟肥作为高含水率污泥堆肥调理剂刘卫袁兴中欧阳建新钟曾光明黄华军柴琦(1.湖南大学环境科学与工程学院,长沙410082;2.环境生物与控制教育部重点实验室(湖南大学),长沙410082;3.湖南大学土木工程学院,长沙410082;4.广卅I市水务局,广州510640)摘要采用静态强制通风好氧堆肥的方法,以木屑作为对比,考察了利用污泥熟肥作为调理剂对污泥堆肥过程
2、的影响。结果表明,与以木屑作为调理剂的污泥堆体(对照组)相比,以污泥熟肥作为调理剂的污泥堆体(实验组)升温快,高温阶段(>50%)持续时间长达10d,满足粪便无害化卫生标准的要求,而对照组仅持续了2d;实验组腐熟的堆肥含水率从60%降到39%,下降了21%,pH维持在7.5~8.5范围内,微生物活性较强,而对照组含水率仅下降15%,pH始终低于7.5;实验组种子发芽指数(GI)在第14天就回升到80%以上,基本上去除了植物毒性,而对照组GI在第22天才回升到50%。总体而言,污泥熟肥能显著改善堆肥中微生物的微环境,促
3、进有机物的降解,缩短堆肥腐熟时间,是一种优质的调理剂。关键词污泥熟肥调理剂污泥堆肥中图分类号X703文献标识码A文章编号1673—9108(2013)06—2349—06ApplyingmaturedsludgecompostassludgecompostingconditionerLiuWei'YuanXingzhong,OuyangJianxin。,ZhongHua,。ZengGuangming·。HuangHuajun,。ChaiQit(1.CollegeofEnvironmentalScienceandEng
4、ineering,HunanUniversity,Changsha410082,China;2.KeyLaboratoryofEnvironmentalBiologyandPollutionControl(HunanUniversity),MinistryofEducation,Changsha410082,China;3.CollegeofCivilEngineering,HunanUniversity,Changsha410082,China;4.GuangzhouWaterAffairBureau,Guangz
5、hou510640,China)AbstractTheeffectofsludgematuredcompostonsewagesludgestaticforced—aerationcompostingwasstudied.Itshowedthat,comparedwithsawdust(matchedgroup),thecompostmixedwithmaturedsludgecom—post(experimentalgroup)warmedfaster.Andthehigh·temperaturestage(>50
6、%)continuedfor10days,whichachievedthesanitarystandardforthenon—hazardoustreatmentofnightsoil,whilethehigh—temperaturestageofmatchedgrouplastedforonlytwodays.Thewatercontentofexperimentalgroupdecreasedfrom60%to39%,decreasedby21%,andthepHvaluewerebetween7.5and8.5
7、,whichpromotedtheactivityofmi·crobe.Butthewatercontentofmatchedgroupdecreasedonlyby15%.andthepHvaluewasalwayslowerthan7.5.Thegerminationindex(GI)ofexperimentalgroupincreasedto80%onthe14thday,whichsuggestedthatthebiologicaltoxicityofcompostwasalmostremoved.GIofm
8、atchedgroupwaslowerthan50%untilthe22thday.Allinall,maturedsludgecompostconditionercanimprovethemicroenvironmentofcomposting,promotethedegradationoftheorganicmatter,andaccele
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