干法腈纶典型点源废水处理可行性试验的研究

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1、摘要干法腈纶生产废水组成复杂，由于对其污染物的组成特征、可生化性研究的不足，国内外至今没有形成有效的处理技术。本论文在研究过程中，首先对干法腈纶生产工艺进行调研，确认了3种典型的腈纶点源废水：丙烯腈废水、腈纶聚合废水、溶剂回收废水。上述3种点源废水的有机组成复杂，污染负荷高，对其进行有效处理是污水场达标的前提条件。基于梯度膜分离方法，并综合高等仪器分析手段，完成了对腈纶生产3种典型点源废水的水质剖析。水质剖析结果表明，丙烯腈废水的处理应以提高其可生化性作为重点；聚合废水处理要兼顾SS的有效去除与可生化

2、性改善；溶剂废水处理应以COD、DMF的去除作为重点。在该处理思路的指导下，开展了3种典型腈纶点源废水处理的可行性试验。Fenton氧化可有效改善丙烯腈废水的可生化性，其BODdCOD可提高至0．416。絮凝．Fenton组合工艺可高效去除聚合废水中的SS与胶体、溶解性污染物，并将BODs／COD自0．09提高到O．25。Fenton氧化可有效降解溶剂废水中的COD与DMF，对COD、DMF去除率最高可达90．23％、79．43％。关键词：干法腈纶；点源废水；膜梯度分离：可生化性Feasibility

3、StudyOHtheTypicalPointSourceWastewatersfromDry-spunAcrylicFiberProductionABSTRACTAcrylicFibersWastewater(AFW)wasfeaturedwithcomplexpollutantscomposition．TherewasnotyetaneffectivetreatmenttechnologyforAFWasthelackofresearchonpollutantscompositionanditsbi

4、odegradability．Inthisstudy,threetypicalpointsourcewastewatersnamedacrylonitrilewastewater,acrylicpolymerizationwastewater,andsolventrecyclingwastewaterfromdry-spunacrylicfibersproductionweredefinedafteradetailedinvestigationtoacrylicfibersmanufacturepro

5、cess．Abovethreetypicalpointsourcewastewatershavecomplexorganicpollutioncompositionandhighpollutionload，effectivetreatmentofthemcomplianceaprerequisiteforwastewatertreatmentplantmeetingthesewagedischargestandard。BasedonMembraneGradientSeparation(MGS)comb

6、inedwithadvancedinstrumentanalyticaltools，Waterqualityanalysisofthreetypicalpointsourcewastewaterswerefinished．Theanalysisresultsshowedthatacrylonitrilewastewatertreatmentwouldbeemphasizedonbiodegradabilityimprovement，andacrylicpolymerizationwastewatero

7、nSSremovalandbiodegradabilityimprovement,andsolventrecyclingwastewateronCOD，DMFremoval．Undertheguidanceofaboveideas，Feasibilitystudyonthetypicalpointsourcewastewatersfromdry-spunacrylicfiberproductionwasdeveloped．ExperimentsshowedthatFentonoxidationcane

8、ffectivelyimprovethebiodegradabilityofacrylonitrilewastewaterbyincreasingitsBODflCODto0．416．Theflocculation-FentoncombinedprocesscanefficientlyremovetheSS，colloidalanddissolvedpollutantsintheacrylicpolymerizationwastewater,Andinc