颗粒活性炭对A_O-MBR处理垃圾渗滤液的影响
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2020-04-07 18:27:58
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第36卷第12期2016年12月工业水处理IndustrialWaterTreatmentV0l_36No.12DeG.2016颗粒活性炭对A/O—MBR处理垃圾渗滤液的影响杨恒,肖惠群,夏四清(同济大学污染控制与资源化研究国家重点实验室,上海200092)[摘要]采用A/O—MBR处理垃圾渗滤液,考察投加颗粒活性炭(GAC)对出水水质、膜污染的影响,以及不同投加量对出水水质的影响。结果表明:与不投加GAC相比。在A/O—MBR中投加0.75g/LGAC时,出水平均COD从1585mg/L下降到1484mg/L,NH4~-N平均从25.6mg/L下降到23mg/L,出水水质有所提高。同时膜压增长速度减慢,膜表面泥饼层厚度减小.表明膜污染减缓。当GAC投加量从1g/L提高到2g/L时.出水平均COD从l220mg/L下降到840mg/L,出水NH4~-N平均从20.8mg/L下降到18mg/L,说明增大GAC投加量有助于提高MBR出水水质,同时可大大减缓膜污染,并明显降低垃圾渗滤液后续纳滤、反渗透处理的污染压力。[关键词]O—MBR;垃圾渗滤液:颗粒活性炭[中图分类号]X703[文献标识码]A[文章编号]1005—829X(2016)12—0047—04InfluencesofGAConthetreatmentoflandfillleachatebyA/O-MBRYangHeng,XiaoHuiqun,XiaSiqing(StateKeyLaboratoryofPollutionControlandResourceReuse,roneyiUniversity,Shanghai200092,China)Abstract:A/O—MBRhasbeenusedfortreatinglandfillleachate.TheinfluencesofGAConefiuentwaterquality,andmembranefouling,aswellastheinfluencesofdifferentGACdosagesoneffluentwaterqualityareinvestigated.TheresultsshowthatcomparedwiththecasethatnoGACisadded,theefluentaverageCODdecreasesfrom1585mg/Lto1484mg/L,andtheaverageNH4+-Ndecreasesfrom25.6mg/Lto23mg/L,when0.75g/LofGACisaddedtoA/O-MBR.Itindicatesthattheefluentwaterqualityhasbeenimproved.Meanwhile,thetransmernbranepressureincreasingrateissloweddown,thethicknessofmembranesurfacecakelayergetsthinner,indicatingthemembranefoulingisalleviatedobviously.WhenGACdosageisincreasedfrom1g/Lto2geL,theeffluentaverageCODdecreasesfrom1220mg/Lto840mg/L,andtheefluentaverageNHV-Ndecreasesfrom20.8mg/Lto18mg/L.ItindicatesthatincreasingGACdosagehelpstoimprovetheefluentwaterqualityofMBR,andalleviatemembranefoulinggreatly.Furthermore,thefoulingpressurefromthefollowingnano—fihrationandreverseosmosistreatmentoflandfillleachatecanbelightenedremarkably.Keywords:A/O—MBR;landfillleachate;granularactivatedcarbon垃圾渗滤液是指垃圾在堆积和填埋过程中由于发酵和雨水的淋浴、冲刷以及地表水、地下水的浸泡而滤出来的污水⋯。垃圾渗滤液成分比较复杂.水质水量波动大,毒性较大,其有机物、氨氮、重金属等含量往往较高{]-21垃圾渗滤液的处理大多采用物化和生物处理联合工艺.但目前尚没有一种工艺十分完善。能很好地处理垃圾渗滤液。垃圾渗滤液的处理已经成为污水处理中的棘手问题膜生物反应器(MBR)可将生物处理与膜分离技术结合在一起。具有处理效率高、出水水质好、工艺流程短、剩余污泥量少。占地面积小等优点0-53。但膜污染一直是
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