氧化锌纳米颗粒对污泥厌氧消化过程的影响研究
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2020-03-12 16:13:43
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中国环境科学2017,37(I):174~180ChinaEnvironmentaIScience氧化锌纳米颗粒对污泥厌氧消化过程的影响研究王树涛p,陈玲波1,张真瑞1,巫川1,姜瑞2,尤宏1(1.哈尔滨工业大学城市水资源与水环境国家重点实验室,黑龙江哈尔滨150090;2.黑龙江省环境保护科学研究院,黑龙江哈尔滨150056)摘要:建立了污泥厌氧消化反应器,以氧化锌纳米颗粒(ZnONPs)为研究对象,研究了不同浓度ZnONPs(0,2,30,60,90,120,150meggvss)对污泥厌氧消化过程的影响,分析了可能存在的剂量一效应关系.低浓度(2m∥g—VSS)ZnO—NPs对污泥厌氧消化过程影响较小;较高浓度下,znO—NPs对污泥厌氧消化产气效率、有机物降解效率和污泥减量效果等具有显著影响,而对挥发酸产量及其组成无显著影响.ZnONPs暴露浓度为30,60,90,120mg/g—VSS时,平均日产气量直线下降,在120mg/g—VSS浓度后平均日产气量为对照组的10%左右.ZnO—NPs对有机物降解效和污泥减量存在明显抑制作用,且随着ZnO—NPs浓度的升高,SCOD去除率、TCOD去除率和RwssTSS)值降低.Zn0-NPs浓度升高到120mg/gfVss时,SCOD去除率、TCOD去除率和R(vssTSS)值分别减少到对照组的3%、36.5%和74%.此外,当ZnO—NPs暴露浓度从2mg/g—VSS升高到150rrlegg—VSS时,污泥减量率从23%左右下降至4.8%左右.关键词:氧化锌纳米颗粒(ZnO—NPs):生物毒性;污泥厌氧消化:污泥减量中图分类号:X703文献标识码:A文章编号:10006923(2017)01一0174一07EffectofZincoxidenanopartielesonanaerobicdigestionofexcessactivatedsludge.WANGShu—tao”,CHENLing—b01,ZHANGZhen—ruil,WUChuanl,JIANGRui2,YOUHon91(1.StateKeyLaboratoryofUrbanWaterResourceandEnvironment,HarbinInstituteofTechnology,Harbinl50090,China;2.HeilongjiangResearchAcademyofEnvironmentalSciences,Harbin150056,China).ChinaEnvironmentalScience,2017,37(1):174-180Abstract:TheimpactofZincoxidenanoparticles(ZnO-NPs)(0,2,30,60,90,120and150mg/g-VSS)ontheanaerobicdigestionofexcessactivatedsludgewasinvestigatedandthepossibledose—effectrelationshipwasachieved.ResultsindicatedthatlessadverseeffectsofZnO-NPswerefoundonanaerobicdigestionofexcessactivatedsludgeatthelowexposureconcentration(2mg/g—vss).However,significanteffectswereobservedontheanaerobicdigestionincludingbiogasproduction,degradationefficiencyoforganicsaswellasreductionrateofsludge,butnosignificanteffectswasfoundonthevolatilefattyacids(VFAs).TheaveragedailygasproductionplummetedwhentheexposureconcentrationofZnO—NPswasincreasedfrom30mg/g·VSSto120mg/g-VSS,butnoobviousdecreaseofdailygasproductionwasobservedastheconcentrationwasincreasedfrom120mg/g-VSSto150mIg/g—VSS.Inadditon.ZnO—NPscouldsignificantlyinhibitthedegradationefficiencyoforganicmatterandthesludgereductionrate,andwiththeincreasingofZn
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