糖蜜酒精厌氧出水论文：糖蜜酒精厌氧出水强化预处理技术研究 4页

糖蜜酒精厌氧出水论文：糖蜜酒精厌氧出水强化预处理技术研究【中文摘要】目前,针对糖蜜酒精厌氧出水的研究较少。糖蜜酒精废水经过厌氧处理后,仍存在较高浓度的有机物(COD-14220mg/L),大多以长链烃类、烯烃类、苯类及酚类的形式存在,生物毒性大(EC50=15.21%),且BOD5/COD低(0.14),色度高(5880倍),是一种难生物降解的有机废水。针对废水有机浓度高难降解特性,本文选用Fenton氧化工艺和铁炭微电解对废水进行强化预处理,以降低废水的生物毒性,提高其可生化性(BOD5/COD)。实验首先采用单因子杯罐试验法考察Fenton氧化工艺处理,实验结果表明,在初始pH=6,m(H2O2):m(Fe2+)为1：1,H202的用量为2.13g/L,采用氢氧化钙调节出水pH值至9,COD去除率77%,色度去除率为86%,可生化性略有提高(BOD5/COD为0.24)；生物毒性由强毒降为无毒,通过GC-MS分析可知出水中几乎无大分子有机物。试验对比Fe2+【英文摘要】Molassesalcoholanaerobiceffluentcontainsplentyoftoxicorganiccompounds,suchaslong-chainhydrocarbon,olefin,benzeneandformphenols,whichleadstopoorbiodegradability.Inordertoensurethatwastewatercouldmeetthedischargestandard,pretreatmentofhighdensityandrefractoryorganiccompoundsisindispensable.Therefore,experimentswereconductedtostudytheroleofFentonreactionandmicro-electrolysisinremovingCODanddecreasingtoxicity andimprovingthebiodegradability.Fentontreatmentwaspreliminarilyemployedtoinvestigatethemechanismsofaffectingfactors.Basedonbothoftheremovalperformanceandtheoperatingcosts,optimalreactionconditionwasproposedasfollows:m(H2O2):m(Fe2+)=1:1,H2O2dosage2.13g/L,30minatinitialpH=6,andthetreatedwastewaterregulatedbycalciumhydroxide.Undertheseconditions,theCODremovalis77%,colorremovalis86%andthedegradabilityofFentoneffluentcanbeenhancedto0.24(BOD5/COD),bio-toxitydecreasedtonon-toxicfromstrongtoxicity.Furthermore,organiccompoundsanalyzedbyGC-MSmethodaremainlynon-toxiccomplexorganics.Operationcostwas16.33RMB/tconsideringreagentcost.DuetocostlinessofH2O2,furtherexperimentofiron-carbonelectrolysiswaspretreatedbyiron-carbonmicro-electrolysisandtheeffectoftheinfluentpHvalue,irontocarbonratio,andaerationtimeontheCODremovalefficiencywasmainlydiscussed.Operatingatm(iron):m(carbon)=1:1,aerationtime5.5houratinitialpH=3,andcalciumhydroxideregulatedthetreatedwastewater,greatpreformanceachieved:71%ofCODwasremovedand89%ofchromaticitywasdecreased.Furthermore,thedegradabilityofiron-carbonelectrolysiseffluentcanbeincreasedfrom0.14to0.35andbio-toxitydecreasedto non-toxic.Theiron-carbonelectrolysisprocessismuchpreferredregardingtheCODremovalefficiencyandbiodegradability,includingthecostofreagentis6.6RMB/t.ResponseSurfaceMethodologymodelwassetupforFentonreactiononanaerobiceffluenttreatment,takingCODremovalrateastheresponsevalue,andF=32.89andp=0.0006showsthemodelisreliable.TheresultsshowthatitisareliablemodelfortheirinteractionsandsinglefactorsofinitialpH,hydrogenperoxidedosageandH2O2/Fe2+ratiohaveasignificanteffectonthemodel,whichinorderasinitialpH,m(H2O2):m(Fe+),andH2O2dosage.Themodelresultshaveabetterprediction.【关键词】糖蜜酒精厌氧出水铁炭微电解Fenton处理响应曲面【英文关键词】Molassesalcoholanaerobicwastewateriron-carbonmicro-eleysisotreatmentFentonresponsesurfacemodel【备注】索购全文在线加我：1.3.99.3.8848同时提供论文一对一写作指导和论文发表委托服务【目录】糖蜜酒精厌氧出水强化预处理技术研究摘要5-6Abstract6第1章 引言9-161.1糖蜜酒精废水来源与水质特征9-111.2糖蜜酒精厌氧出水后续处理研究现状11-141.3响应曲面14-151.4本课题研究目的和内容15-16第2章实验装置与方案16-262.1实验主要试剂162.2分析方法16-212.3废水水质特征21-252.4本章小结25-26第3章Fenton氧化工艺强化预处理糖蜜酒精厌氧出水26-383.1Fenton氧化机理26-273.2实验材料与方法27-283.3Fenton氧化工艺处理效果28-363.4成本估算36-373.5本章小结37-38第4章铁炭微电解工艺强化预处理糖蜜酒精厌氧出水38-504.1铁炭微电解原理38-394.2实验材料与方法39-404.3铁炭内电解工艺处理效果40-484.4成本估算484.5预处理工艺的确定48-494.6本章小结49-50第5章响应曲面优化50-575.1实验设计50-515.2实验结果51-565.3本章小结56-57第6章结论与建议57-596.1结论57-586.2建议58-59参考文献59-63致谢63