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1、第5卷第5期环境工程学报Vol.5,No.52011年5月ChineseJournalofEnvironmentalEngineeringMay2011初始pH对产氢发酵液厌氧产甲烷的影响研究1,21,21,2鲁珍周兴求伍健东(1华南理工大学环境科学与工程学院,广州510006;2华南理工大学工业聚集区污染控制与生态修复教育部重点实验室,广州510006)摘要以啤酒厂厌氧颗粒污泥为接种物,对葡萄糖废水产氢后的发酵液进行间歇式中温厌氧发酵产甲烷实验。研究了不同的进水初始pH为5502、6002、6502和7002时对产氢发酵液产甲
2、烷的影响,并以产氢发酵液的原始pH(42~44)作为对照。结果表明:产氢发酵液厌氧产甲烷必须添加一定量的碱加以调节,进水初始pH的最佳选择为55~60。进水pH为55和60时,系统内pH在产甲烷菌的适宜范围内,COD去除率可达99%,甲烷含量基本维持在60%~68%,最高时达到72%。而进水pH为65和70时,系统内pH持续在7.3以上;进水pH为70时COD去除率和甲烷含量都比pH为55,60,65时要低;实验组4种情况出水VFA均在300mg/L以下。关键词产氢发酵液初始pH产甲烷中图分类号X703文献标识码A文章编号1
3、6739108(2011)05111504StudyoneffectofdifferentinitialpHonmethaneproductionofbiohydrogenfermentativeliquid1,21,21,2LuZhenZhouXingqiuWuJiandong(1CollegeofEnvironmentalScienceandEngineering,SouthChinaUniversityofTechnology,Guangzhou510006,China;2TheKeyLabofPollutionControlandEcosyste
4、mRestorationinIndustryClusters,MinistryofEducation,SouthChinaUniversityofTechnology,Guangzhou510006,China)AbstractWithbrewerygranularsludgeasinoculum,methaneproductionusingbiohydrogenfermentativeliquidundermesophilicanaerobicfermentationconditioninabatchdigesterwastested.Inthisstudy,di
5、fferentinitialpH(5.50.2,6.00.2,6.50.2and7.002)weretestedtoinvestigatetheeffectofinitialpHonmethaneproductionusingbiohydrogenfermentativeliquidandtheoriginalpHofbiohydrogenfermentativeliquid(4.2~4.4)wasstudiedascontro.lBatchtestresultsshowedthatinitialpHofbiohydrogenfermentativeliqu
6、idmustbeadjustedbyaddingacertainamountofalkaliduringanaerobicmethaneproductionprocess,andtheoptimuminitialpHofinfluentwere5.5~6.0.WhentheinitialpHwere5.5and6.0,pHofthesystemwaswithintheappropriaterangeofmethanogenicbacteria,andtheCODremovalefficiencyof99%canbeobtained,inthemeantime,met
7、hanecontentswereintherangeof60%~68%andthehighestcontentcouldbeupto72%.WhentheinitialpHwere6.5and7.0,pHofthesystemwasabove7.3.WheninitialpHwas7.0,boththeCODremovalefficiencyandmethanecontentwerelower.VFAoftheeffluentsinthefourexperimentalgroupswereallbelow300mg/L.Keywordsbiohyd
