脱水污泥生物干化及产物农用性质评价.pdf

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1、农业环境科学学报2011,30(11)：2379-2383JournalofAgro—EnvironmentScience脱水污泥生物干化及产物农用性质评价邵立明，顾伟妹，徐华成，王冠钊，何品晶+(同济大学环境科学与工程学院固体废物处理与资源化研究所，上海200092)摘要：城市污泥的生物干化及产物农用已引起越来越多的关注。本研究探讨了不同调理剂对生物干化堆体温度和产物含水率的影响，分析了干化过程中有机物的降解，及十化产物生物稳定性和重金属含量的变化趋势。结果表明：以稻草为凋理剂的堆体最高温度町达67℃，千化产物含水率可

2、从73％降至52％．产物4日耗氧呼吸速率降至10mgO：·g-1DM，显示了较好的稳定性。生物干化过程中，蛋白质和腐殖质含量逐渐降低。而多糖含量比较稳定。生物干化后产物重金属含量有所提高，除zn部分超标外，其余重金属均未超出《农用污泥中污染物控制标准》(GB4284--1984)规定的限值。关键词：脱水污泥；生物干化；农用；调理剂中图分类号：X799．3文献标志码：A文章编号：1672—2043(2011)11-2379—05Bio-dryingofDewateredSludgeandCharacteristicsAna

3、lysisofBio-driedProductsinAgriculturalApplicationSHA0“-ming，GUWei-mei，XUHua-cheng，WANGGuan-zhao，HEPin-jing"(CollegeofEnvironmentalScienceandEngineering，InstituteofWasteTreatmentandReclamation，TongjiUniversity，Shanghm200092，China)Abstract：Sludgebio-dryingisavariat

4、ionofaerobicdecomposition，inwhichsludgeisdriedbytheheatgeneratedbyaerobicdegradationofitsorganicmatters．Recendy，moreandmoreattentionsarepaidonthebio—dryingofdewateredsludgeandtheagriculturalapplicationofitsbid-driedproducts．Strawandsawdustarecommonlyusedbulkingag

5、entsinsludgebio—drying．Thisstudyevaluatedtheeffectsofthediffer-entbulkingagentsonthevariationsofpiletemperature，watercontent，organicmatters，biodegradabilityandheavymetalcontentsforbio-driedproducts．Theresultsshowedthatstrawwasmoresuitablebulkingagentforsludgebio-

6、dryingthansawdust．andthepileusingstrawhadatemperatureashighasabout67oC．Thewatercontentofbio—driedproductsdecreasedfrom73％to52％，andthe4一dayaerobicrespi-rationratereducedto10m902"g-1DM，showinghighbiodegradability．Thecontentsofproteinsandhumicmattersdecreasedduringb

7、io—dry—ingprocess，whilethatofpolysaccharidesremainedconstant，whichwouldbeattributedtothehighproteasecontentsinsludge．’Fheratiosofhumicacids／fulicacidsbothincreasedforthetwobio-dryingpiles，indicatingthatthebio—dryingprocesswouldbesuitablefortheformationofhumicacid

8、s．Furtherstudyshowedthatthecontentsofheavymetalsincreasedduringthebio-dryingprocess，while"alltheheavymetals，exceptforZn，didnotexceedthemaximumpermissibleconten