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1、BiohydrogenProductionfromSewageSludgeUsingaContinuousHydrogenFermentationSystemwithaHeatTreatmentVesselKSCEJournalofCivilEngineering(2010)14(5):673-679Abstract：Ananaerobichydrogenfermentationsystemwithathermophilicflow-throughreactor(55oC)forhydrogenproductionandaboilingretentionvessel
2、(100oC)forcontinuousheattreatment,wasstudiedforenhancedcontinuoushydrogenfermentationusingsewagesludge.TheperformanceofthehydrogenfermentationsystemwastestedatvariousHydraulicRetentionTimes(HRTs)rangedfrom1to5days.Theheattreatmentofthefermentingsludgeusingtheboilingretentionvesselwasan
3、effectivetoselecthydrogenproducingbacteria,andtoincreasethehydrolysisofparticulateorganicsinsewagesludge。IntroductionCommercialhydrogenisalmostproducedfromsteamreformingofnaturalgasesandgasificationofcoal,buttheserequirehigh-energyinputsobtainedfromnon-renewableresources.Withbothadvant
4、agesofhydrogenproductionandstabilizationoforganicwaste,theanaerobicfermentationisrelativelyanefficientandinexpensivemethodcomparedtothephysicochemicalmethodsforhydrogenproduction.Theobjectiveofthestudyistodevelopacontinuousanaerobichydrogenfermentationsystemwithstablehydrogenproduction
5、byheattreatment,andwithhighyieldofhydrogenbyadoptingthermophiliccondition.MaterialsandMethodsExperimentalApparatusGassamplingpotActivatingreactorBiogasSludgetankInsutationHeatingCoilThermophilicfermenterEfluentAnalysisandCalculationsBiogasproductionwasmonitoreddaily,anditscompositionwa
6、sanalyzedbyagaschromatographequippedwithathermalconductivitydetectorToanalyzethemethaneandcarbondioxideinthebiogas.withaflowrateof40mL/min,andthetemperaturesoftheinjector,detector,andcolumnwere80,90,and50oC,respectively.Thevolatilefattyacidlevelsandtheircompositionswereanalyzedbyhigh-p
7、erformanceliquidchromatography.Themixedliquorswereintermittentlytaken fromboththeflow-throughandtheretentionreactor,andthe properties,includingpH,alkalinity,COD,VSS,VS,andTS,of thesampleswerealsoanalyzedaccordingtotheStandard Methods.ThehydrolysisrateandVFAproductionratewerecalculate
