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养猪粪污厌氧消化重金属变化特征及影响

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  • 2020-04-09 19:16:40

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DOI:10.3969/j.issn.16746732.2019.04.011养猪粪污厌氧消化重金属变化特征及影响胡修韧1ꎬ杨东海2ꎬ边博1∗(1.南京师范大学环境学院ꎬ江苏南京210023ꎬ2.同济大学环境学院ꎬ上海200092)摘要:对太湖流域某典型养猪区域粪污收集后集中厌氧消化处理ꎬ分析猪饲料、猪粪和沼肥中重金属总量和形态变化特征ꎬ探讨厌氧消化过程重金属形态变化及其影响因素ꎮ结果表明ꎬ不同养殖阶段中猪饲料重金属含量差异较大ꎬ仔猪饲料和猪粪中Cu、Zn和Cd含量较高ꎬ而Cr和Ni在生长肥育猪后期饲料和猪粪中含量最高ꎮ猪粪中Cu主要以有机结合态、Zn主要以Fe-Mn氧化物结合态、Pb和Cr主要以残渣态、Ni主要以Fe-Mn氧化物态和碳酸盐结合态赋存ꎬ沼液中Cu和Zn平均值为猪粪液中含量的1.59和1.40倍ꎬ沼渣中Cu和Zn平均值为调节池猪粪的1.58和1.37倍ꎬ厌氧消化后重金属存在“相对浓缩效应”ꎬpH值、DOC和OM为厌氧消化过程影响重金属变化的主要因素ꎮ关键词:猪饲料ꎻ养猪粪污ꎻ厌氧消化ꎻ重金属ꎻ形态变化ꎻ太湖流域中图分类号:X820文献标志码:B文章编号:16746732(2019)04004806DistributionCharacteristicsandIt’sInfluenceofHeavyMetalsinRawandAnaerobicallyDigestedPigSlurryHUXiu ̄ren1ꎬYANGDong ̄hai2ꎬBIANBo1∗(1.SchoolofEnvironmentꎬNanjingNormalUniversityꎬNanjingꎬJiangsu210023ꎬChinaꎬ2.SchoolofEnvironmentꎬTongJingUniversityꎬShanghaiꎬ200092ꎬChina)Abstract:TostudythemorphologicalchangesofheavymetalsinanaerobicdigestionprocessanditsinfluencingfactorsꎬcentralizedanaerobicdigestiontreatmentwascarriedoutonthemanurecollectedfromatypicalpigfarmingareaintheTaihuLakeBasinꎬandthetotalandmorphologicalcharacteristicsofheavymetalsinpigfeedꎬpigmanureandbiogasfertilizerwereanalyzed.Theresultsshowedthatthecontentofheavymetalsinpigfeedwasdifferentindifferentbreedingstages.ThecontentsofCuꎬZnandCdinpigletfeedandpigmanurewerehigherꎬwhileCrandNiwerethehighestinfeedandpigmanureinthelatestageofgrowthandfatteningpig.InpigmanureꎬCuismainlyinorganicallyboundstateꎬZnismainlyinFe ̄Mnoxide ̄boundstateꎬPbandCraremainlyinresidualstateꎬandNiismainlyinFe ̄Mnoxide ̄boundstateandcarbonate ̄boundstate.TheaveragevaluesofCuandZninbiogasslurrywere1.59and1.40timesofthatinpigmanureꎬandtheaveragevaluesofCuandZninbiogasresiduewere1.58and1.37timesofthatinpigmanureinregulatingpond.Theconcentrationofheavymetalsinbiogasslurryappearedarelativeconcentrationeffect.pHꎬDOCandorganicmatterwerethemainfactorsaffectingthechangeofheavymetalsinanaerobicdigestionprocess.Keywords:PigfeedꎻPigslurryꎻAnaerobicallydigestionꎻHeavymetalsꎻMorphologicalchangeꎻTaihuLakeBasin收稿日期:2018-12-27ꎻ修订日期:2019-01-24基金项目:江苏省环境监测科

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