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1、第5卷第5期環(huán)境工程學報Vol.5,No.52011年5月ChineseJournalofEnvironmentalEngineeringMay2011初始pH對產氫發(fā)酵液厭氧產甲烷的影響研究1,21,21,2魯珍周興求伍健東(1華南理工大學環(huán)境科學與工程學院,廣州510006;2華南理工大學工業(yè)聚集區(qū)污染控制與生態(tài)修復教育部重點實驗室,廣州510006)摘要以啤酒廠厭氧顆粒污泥為接種物,對葡萄糖廢水產氫后的發(fā)酵液進行間歇式中溫厭氧發(fā)酵產甲烷實驗。研究了不同的進水初始pH為5502、6002、6502和7002時對產氫發(fā)酵液產甲
2、烷的影響,并以產氫發(fā)酵液的原始pH(42~44)作為對照。結果表明:產氫發(fā)酵液厭氧產甲烷必須添加一定量的堿加以調節(jié),進水初始pH的最佳選擇為55~60。進水pH為55和60時,系統(tǒng)內pH在產甲烷菌的適宜范圍內,COD去除率可達99%,甲烷含量基本維持在60%~68%,最高時達到72%。而進水pH為65和70時,系統(tǒng)內pH持續(xù)在7.3以上;進水pH為70時COD去除率和甲烷含量都比pH為55,60,65時要低;實驗組4種情況出水VFA均在300mg/L以下。關鍵詞產氫發(fā)酵液初始pH產甲烷中圖分類號X703文獻標識碼A文章編號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
