高浓度酒糟废水厌氧发酵产沼气条件研究陈承峰

20182345385·7·(510006)[](30~40)pH7.0~7.5(VFA)COD26000~68000mg/L34%~62%CODCODpHCOD[][]TQ[]A[]1007-1865(2018)23-0007-03StudyonBiogasProductionConditionsofAnaerobicFermentationofHighDistiller'sGrainsWastewaterChenChengfeng,DengMingjun(SchoolofCivilEngineering,GuangzhouUniversity,Guangzhou510006,China)Abstract:Inordertoverifythefeasibilityofanaerobicfermentationofricewineleesforbiogasproductionandprovidedatareferenceformiddlescaleexperiment,theanaerobicfermentationsmallscaleexperimentwasdoneinaself-madeanaerobicfermentationreactorundertheconditionofmediumtemperature(30~40)andpH7.0~7.5.Resultsshowedthatricewineleeswasagoodrawmaterialforbiogasproduction,itcaneasilyacidifyandformalargenumberofvolatilefattyacids(VFA).InthecaseofinputCODof26000~68000mg/L,themethanecontentinbiogaswasbetween34and62%,andthemethanecontentinbiogasincreasedwiththeinputCODandtheremovalefficiencyofCOD.Duringthefermentationprocess,thetemperatureandpHshouldbecontrolledstrictly.Thecontentofacidflameretardantgasinbiogaswasverylow,soitcouldbeusedasindustrialfuel.AnaerobicfermentationwithhighCODricewineleesisfeasible.Keywords:lees;anaerobicfermentationthemediumtemperatureremovalefficiencybiogas[1]COD[2][3]2015574750%[4]()[5,6]COD11.1200L87%~90%100200m311Tab.1QualityofthewastewaterpH/(mg/L)/(mg/L)/(mg/L)/(mg/L)61.0×1051351.28×103225(EGSB),CODCOD10000mg/LCOD20000mg/L22Tab.2ThequalityofinoculatedanaerobicsludgepH/(mg/L)(VFA)/(mg/L)/%/%6.951220112.518.8210.741.2(UASB)(IC)50~100L/d80.6m30.2m30.4m31.31.3.13[]2018-04-02[](1993-)201823·8·(PHS-3C)2(EW300)3(COD)COD451.3.2(30)(30~40)(40~55)[7][8][9]EGSBCOD10000~20000mg/LCOD20000mg/L,COD,67L35~40NaOHpHCODCODCOD22.125134%45%~55%25EGSBCOD10000~20000mg/LCODCOD60000mg/L20000mg/LCOD51015202505101520253035404550556065(%)t/d1Fig.1Thechangeofthepercentageofmethanewithtime2.2COD2.2.1CODCOD2COD36%~64%COD37000mg/L38000mg/L49%38%44%CODCOD41000mg/LCOD66000mg/L64%CODCOD26000mg/LCOD——(1)(2)pH2000030000400005000060000700003035404550556065(%)COD(mg/L)2CODFig.2ThechangeofthepercentageofmethanewiththeinputCOD2.2.2CODCOD3CODCODCOD45.7%46.3%49%38%COD50%54.4%64%3540455055603540455055606530(%)COD(%)3CODFig.3TherelationshipbetweentheremovalefficiencyofCODandthepercentageofmethane2.32.3.1100[10]3540420182345385·9·5101520250510152025303540(C)(t/d)4Fig.4Thevariationofthetemperatureofinputandoutput36~395~726~3526~342.3.2pHpH6.8~7.2pH6.0~8.5[11]NaOHpH7~7.5pH5510152025012345678pH(d)pHpH5pHFig.5ThevariationofthepHofinputandoutput5pHpH7.0~7.5pH6.0~6.7H2/CO2pH6.0~6.72.4CO2SO2CO243%45%3201557CODCODpH(1)(2)CODCODCOD(3)pH(4)[1][J]2000(3)53-55[2][D]2014[3][J]1999(4)13-15[4][J]201130(5)37-40[5][J]200422(3)3-7[6]DONGXZHOUWHESRemovalofanaerobicsolublemicrobialproductsinabiologicalactivatedcarbonreactor[J]()201325(9)1745-53[7][J]1995(yn)51-65[8][J]201465(5)1602-1606[9][D]2012[10][J]201133(3)44-47[11][J]201131(8)1-4