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1、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
2、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,sucha
3、slong-chainhydrocarbon,olefin,benzeneandformphenols,whichleadstopoorbiodegradability.Inordertoensurethatwastewatercouldmeetthedischargestandard,pretreatmentofhighdensityandrefractoryorganiccompoundsisindispensable.Therefore,experimentswereconductedtostudyther
4、oleofFentonreactionandmicro-electrolysisinremovingCODanddecreasingtoxicityandimprovingthebiodegradability.Fentontreatmentwaspreliminarilyemployedtoinvestigatethemechanismsofaffectingfactors.Basedonbothoftheremovalperformanceandtheoperatingcosts,optimalreactio
5、nconditionwasproposedasfollows:m(H2O2):m(Fe2+)=1:1,H2O2dosage2.13g/L,30minatinitialpH=6,andthetreatedwastewaterregulatedbycalciumhydroxide.Undertheseconditions,theCODremovalis77%,colorremovalis86%andthedegradabilityofFentoneffluentcanbeenhancedto0.24(BOD5/COD
6、),bio-toxitydecreasedtonon-toxicfromstrongtoxicity.Furthermore,organiccompoundsanalyzedbyGC-MSmethodaremainlynon-toxiccomplexorganics.Operationcostwas16.33RMB/tconsideringreagentcost.DuetocostlinessofH2O2,furtherexperimentofiron-carbonelectrolysiswaspretreate
7、dbyiron-carbonmicro-electrolysisandtheeffectoftheinfluentpHvalue,irontocarbonratio,andaerationtimeontheCODremovalefficiencywasmainlydiscussed.Operatingatm(iron):m(carbon)=1:1,aerationtime5.5houratinitialpH=3,andcalciumhydroxideregulatedthetreatedwastewater,gr
8、eatpreformanceachieved:71%ofCODwasremovedand89%ofchromaticitywasdecreased.Furthermore,thedegradabilityofiron-carbonelectrolysiseffluentcanbeincreasedfrom0.14to0.35andbio-toxitydecreasedto
