資源描述:
《試析液—液萃取法處理高氯難降解有機(jī)廢水》由會(huì)員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫(kù)。
1、浙江工業(yè)大學(xué)碩士學(xué)位論文液—液萃取法處理高氯難降解有機(jī)廢水姓名:遲春娟申請(qǐng)學(xué)位級(jí)別:碩士專業(yè):化學(xué)工程指導(dǎo)教師:張嗣炯2001.5.1液一液萃取高氯難降解有機(jī)廢水的研究節(jié)摘要8生產(chǎn)苯肼、苯唑醇和乙基氯化物的浙江某農(nóng)藥廠排放的高氯難降解有機(jī)廢水,pH=093,CODcr=39406mg/L,B/C=0.02,CI=56563mg/[,,水最在100噸/}{,目前尚無(wú)有效治理方法。本文用溶劑萃取(又稱液‘弋液萃取)披術(shù),研究了從廢水中分離、富集氯離子,降低廢水【1f氯離了到生化處理允許的范圍,并就實(shí)驗(yàn)結(jié)果作了適當(dāng)?shù)睦碚摲治?。先用模擬廢水研
2、究r對(duì)溶劑萃取的影響岡素?!栋みM(jìn)水pH值、進(jìn)水氯離了濃度、稀釋劑濃度、膜水比),最終確定最佳操作條件為:進(jìn)水pH值及進(jìn)水氯離子濃度越低越有利于氯離了的萃??;稀釋劑:萃取劑一4:3:膜水比為035。在該工藝條竹:下對(duì)混合廢水進(jìn)行處理,經(jīng)該法處理后,氯離子去除率達(dá)832%,CODc。去除率89.2%,B/C山002卜升到0,34?!瑫r(shí)對(duì)萃取溶劑的回收利用進(jìn)行了探索,確定了堿液前處理的回收工藝,使堿液t
3、
4、氯離子濃縮到1399/L左右,萃取劑循環(huán)使用?!腿『髲U水經(jīng)過(guò)絮凝處理,實(shí)驗(yàn)結(jié)果表明最佳絮凝范圍為pH=7.12~7.70,絮凝荊投
5、加量為25%PFS+3‰PAM?!?對(duì)絮凝后廢水作不同的活性污泥生化處理實(shí)驗(yàn),得m結(jié)論是:處碑該廢水的農(nóng)藥廠活性污泥比啤酒廠活性污泥更有效,經(jīng)萃取絮凝生化處理后廢水可達(dá)標(biāo)排放。蛀后對(duì)溶劑葶取機(jī)理和活化機(jī)理進(jìn)行了初步探索。關(guān)鍵詞:難降解有機(jī)物廢水處理氯離子三辛胺液一液萃取高氯難降解有機(jī)廢水的研究’一2一Abstracty≤08020Somehighchlorine—ionrefractoryorganicwastewaterisnegativepartsinPhenylhydrazineandEthylchlorideproducing
6、、ThepHValueofthewastewateris0.93,theCODc,is39406mg/l,BODs/CODc。is002,and·theChlorineiOiliShighto56563mg/I.TheflowofthewateriS100m’/d.Atpresenttherearen0validtreatmentsforthiskindofwater.Inthispaper,theremovalofchlorineionofthewastewaterbyliquid—liquidextraction.theconce
7、ntrationofthechlorineionin5%NaOHsolutionandthebio.degradationoftheorganicwastewaterwerestudied.Thepropertheoreticalanalyseswerecarriedoutcorrespondingly.TheextractionfactorsincludingtheinitialpHValue.theinitiaiChlorineionconcentration,liquidtoliquidratioandorganicphaser
8、atiooftheimitatedwastewaterwerestudied.Theoptimalconditionsweredetermined.ThelowerofthepHValueandChlorineionconcentrationwere,theeasiertoremovetheChlorineionfromwastewater.Theratioofdiluentandextractantwas4:3.Theliquidtoliquidratiowas0.35.Undertheselectedconditionstheex
9、perimentresultsofthewastewatershowedthattheChlorineionextractingratecameto83.2%.theremovalrateofCODc,wasabout89.2%.TheB/Cwasincreasedfrom0.02to0.34.Atthesametimetherecycleoftheextractantwasstudied.Thetreatmentto10adedextractantby5%NaOHsolutionbeforedistillwasdetermined.
10、TheChlorineionconcentrationinthe5%NaOHsolutionwasaboutl39g/lTheusedextractantcanbereusedafterregenerationbyadd