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时间:2020-06-19
《含固率和接种比对叶菜类蔬菜垃圾厌氧消化的影响.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、中国环境科学2014,34(1):207-212ChinaEnvironmenta1Science含固率和接种比对叶菜类蔬菜垃圾厌氧消化的影响何品晶,2牛,胡洁,吕凡,诸一殊,邵立明(1.同济大学固体废物处理与资源化研究所,上海200092;2住房和城乡建设部村镇建设司农村生活垃圾处理技术研究与培训中心,上海200092)摘要:通过叶菜类蔬菜垃圾中温批式厌氧消化实验,比较了含固率(3%、5%、7%)和接种比(1.5、2.5、35)对产甲烷效果的联合影响.结果表明,在研究实验参数范围内,含固率越低、接种比越高,越有利于缩短产甲烷反应迟滞期,平均日产甲烷速率越快经过52d的培养,在含固率为3%、
2、接种比为3.5的工况中,平均日产甲烷速率最快,达到9.5mL/(gVS‘d),日最大产甲烷速率最快,达到49.8mL/(gVS·d),最早进入快速产甲烷期.当接种比为3.5时,随着含固率的升高,产甲烷速率下降,迟滞期延长,但单位底物累计产甲烷量增大,含固率7%时单位底物累计净产甲烷量为481mL/gVS.而当接种比为1.5时,含固率为5%和7%的工况均无法启动甲烷化反应,含固率为3%的工况的产气迟滞期达15d.挥发性有机酸的累积抑制甲烷化反应的启动,迟滞期随着液相中有机酸浓度的增加而延长,当有机酸浓度低于1260mg/L,甲烷化反应没有明显的迟滞期.关键词:叶菜类蔬菜垃圾:中温厌氧消化;含固
3、率;接种比:产甲烷效率中图分类号:X705文献标识码:A文章编号:1000—6923(2014)01—0207—06Influenceoftotalsolidcontentandinoculum。to。substrateratioonanaerobicdigestionofleafvegetablewaste.HEPin-jing’,HUJie,L0Fan,ZHUYi.shu,SHAOLiming(1.InstituteofWasteTreatmentandReclamation,TongjiUniversity,Shanghai200092,China;2.CentrefortheTech
4、nologyResearchandTrainingonHouseholdWasteinSmallTownsandRuralArea,MinistryofHOusingandUrban—RuralDevelopment,Shanghai200092,China).ChinaEnvironmentalScience,2014,34(1):207~212Abstract:Batchexperimentswereconductedtoevaluatemesophilicanaerobicdigestionofvegetablewaste.Theperformancesofanaerobicdiges
5、tionwerecomparedatdiferenttotalsolidcontents(3%,5%,and7%)andinoculum—to-substrateratios(1.5,2.5,and3.5).Gasandliquidphaseanalysisshowedthatthelowertotalsolidcontentandthehigherinoculum-to—substrateratioshortenedthelagphaseofmethanogenesis,andincreasedtheaveragedailymethaneproductionrate。After52days
6、.thetreatmentat3%intotalsolidcontentandinoculum·to—substrateratioof3.5hadthehighestaveragedailymethaneproductionratefromVSof9.5mL/(gVSd),andthehighestdailyhighestmethaneproductionratefromVSof49.8mL/(gVS‘d1.Thistreatmentwasalsothefirsttoentertherapidmethanogenicphase.Ataninoculum-to-substrateratioof
7、3.5,itwasobservedthatasthetotalsolidcontentincreasedthelagphasewasprolongedandtherewasanincreaseinthemethaneproductionrate,andanincreaseinthenetcumulativemethaneproductionpersubstrate.Theamountofnetcumulati
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