_常温下IC反应器处理造纸废水的颗粒污泥生物学特性

常温下IC反应器处理造纸废水的颗粒污泥生物学特性曾国敏,马邕文(华南理工大学环境科学与工程学院,广东广州510006)摘要:采用IC反应器处理OCC造纸废水,研究了常温、不同HRT下的厌氧颗粒污泥特性。结果表明,当HRT为8.3h时,OCC造纸废水比例按10%、30%、50%、80%、100%递增,经过20d的运行,造纸废水完全取代了人工配制废水,且出水COD值保持在500mg/L以下,颗粒污泥驯化完成。用造纸废水驯化后的污泥,其沉降速度在25.02～98.96m/h之间,污泥浓度SS为66.5g/L、VSS为44.69g/L,VSS/SS值为67.2%。随着HRT的缩短,颗粒污泥的平均粒径先增大后减小,SS和VSS都呈先上升后下降的趋势。当HRT为5.5h时,SS和VSS均达到最大,分别为75.2和55.42g/L,VSS/SS值为73.7%。在胞外多聚物中,蛋白质的含量较高,蛋白质与多糖的比值在1.33～2.78之间。随着HRT的逐渐缩短,颗粒污泥的产甲烷活性先是大大降低而后逐渐稳定,辅酶F420含量与产甲烷活性的变化趋势相同。关键词:IC反应器;厌氧颗粒污泥;胞外多聚物;产甲烷活性;辅酶F420中图分类号:X703文献标识码:C文章编号:1000-4602(2011)05-0083-04基金项目:广东省节能减排重大专项(2008A080800003)BiologicalCharacteristicsofAnaerobicGranularSludgeduringTreatmentofPapermakingWastewaterinICReactoratNormalTemperatureZENGGuo-min,MAYong-wen(CollegeofEnvironmentalScienceandEngineering,SouthChinaUniversityofTechnology,Guangzhou510006,China)Abstract:Thecharacteristicofanaerobicgranularsludgeininternalcirculation(IC)reactortrea-tingOCCpapermakingwastewaterwasstudiedatnormaltemperatureanddifferentHRTs.AttheHRTof8.3h,theproportionofthewastewaterisincreasedto10%,30%,50%,80%and100%.After20days,thewastewaterfromOCCsystemissubstitutedforthesyntheticwastewatercompletelyandtheefflu-entCODismaintainedbelow500mg/L.Inthiscase,theacclimationofanaerobicgranularsludgeiscompleted.Afteracclimation,thesettlingvelocityofthesludgeisintherangeof25.02to98.96m/h,SSis66.5g/L,VSSis44.69g/LandVSS/SSis67.2%.WiththedecreaseofHRT,theaveragepar-ticlesizeisincreasedfirstlyandthenreduced,whichisthesameasSSandVSS.WhenHRTis5.5h,SSandVSSreachthemaximum,being75.2g/Land55.42g/Lrespectively,andVSS/SSis73.7%.Fortheextracellularpolymericsubstances(EPS),theproteincontentishigher,andtheratioofproteintopolysaccharideisbetween1.33and2.78.Specificmethanogenicactivity(SMA)ofgranularsludgeissignificantlyreducedfirstlyandthengraduallystable.CoenzymeF420ingranularsludgeshowsthesametrend.·83·第27卷第5期2011年3月中国给水排水CHINAWATER＆WASTEWATERVol.27No.5Mar.2011Keywords:internalcirculationreactor;anaerobicgranularsludge;extracellularpolymericsubstances