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1、摘要酚醛树脂是由酚类(如苯酚、甲酚、二甲酚和壬酚等)和醛类(如甲醛、乙醛和糖醛等)在酸或碱的催化作用下合成的,其生产过程中排出的废水含有较高浓度的酚类、醛类,并且还含有大量醇类、酸类等有毒物,处理难度大。高浓度含酚醛废水需采用萃取、化学氧化、吸附、缩合等预处理降低有毒有害物的毒性和浓度后才可生化处理。本试验所处理的废水为市某胶粘剂厂生产改性酚醛树脂的生产废水，生产中排放2t/d左右的废水。实验中采用碱性缩合正交试验，其中缩合分“一步缩合”试验和“两步缩合”试验。通过寻求正交实验影响因素以及各因素反应的水
2、平值，最终确定为四因素三水平正交，共做9组实验。实验测定水样以及缩合后水样COD值、甲醛浓度、挥发酚浓度、PH值等各项指标。“两步缩合”试验只进行了第一步的反应，COD的去除率能达到41.2％，甲醛的去除率保持在30-40％之间，挥发酚的去除率在40-60％之间。.通过对比“一步缩合”和“两步缩合”试验的预处理效果，得出“一步缩合”试验对COD、甲醛、挥发酚的去除效果更加明显，因此在后期的实验中选择“一步反应”对甲醛和酚的后续处理。关键词：酚醛树脂废水碱性缩合甲醛挥发酚AbstractThephenol
3、icresinisaphenol(suchasphenol,cresol,xylenol,andnonylphenol,etc.)andaldehydes(suchasformaldehyde,acetaldehydeandfurfural,etc.)inacidoralkalinecatalystsynthesis,anditsproductionProcesswastewatercontaininghighconcentrationsofphenols,aldehydes,andalsocontai
4、nslargeamountsofalcohols,acidsandothertoxicsubstances,treatmentisdifficult.Phenolicwastewatercontaininghighconcentrationrequirestheuseofextraction,chemicaloxidation,adsorption,condensationpreconditioningdecreasethetoxicityoftoxicandhazardouscompounds,and
5、onlyaftertheconcentrationofbiologicaltreatment.ThetrialsforthetreatmentofwastewaterplantinJiaozuoCity,amodifiedphenolicresinadhesiveproductionofwastewater,theproductionofemissions2t/dorsoofwastewater.Experiment,alkalinecondensationexperiment,inwhichtheco
6、ndensationpoint"onestepcondensationreaction"and"two-stepcondensationreaction."Orthogonalfactorsbylookingforandvalueofeachfactorlevelofresponse,andultimatelydeterminethelevelofthefourfactorsandthreeorthogonal,atotalof9groupstodoexperiments.Watersampleandt
7、estwatersamplesaftertheCODvalueofthecondensation,theconcentrationofformaldehyde,phenolconcentration,PHvalueandotherindicators."two-stepcondensation"Weonlygotthefirststepofthereaction,CODremovalrateisnotveryhigh,thehighestis41.2%,removalrateofformaldehyde
8、at30-40%,andphenolremovalBetween40-60%..Bycontrast,after"onestepcondensationreaction"and"two-stepcondensationreaction"thepre-effect,cometo"stepcondensationreaction"tothemoreobvioustheremovalofthethreeindexes,soinlaterexper
