高氨氮垃圾渗滤液高效生物脱氮_张树军

中国环境科学2008,28(3)：225~228ChinaEnvironmentalScience高氨氮垃圾渗滤液高效生物脱氮张树军1,2,王淑莹1,毛心慰1,韩晓宇3,曾薇1,彭永臻1*(1.北京工业大学环境与能源工程学院,北京100022；2.北京城市排水集团有限责任公司,北京100038；3.哈尔滨工业大学市政与环境工程学院,黑龙江哈尔滨150090)摘要：以高浓度氨氮城市垃圾渗滤液作为试验用水,在两级UASB(UASB1+UASB2)-A/O试验系统中,对比研究了先在UASB1反硝化(工艺1)与仅在A/O缺氧区反硝化(工艺2)2种工艺的脱氮过程.结果表明,在回流比为300%的条件下,2种工艺的氨氮硝化率均在99%左右,但工艺1比工艺2的TN去除率高21%.2种工艺的无机碳(IC)和pH值的变化规律差别较大,工艺1由于充分利用了原水碳源实现了高效反硝化,在系统中维持了充足的IC和较高的pH值,实现了75%~95%NO2--N累积率的短程硝化.确认能否有效利用有机碳源是产生脱氮效率差异的根本原因.关键词：高浓度氨氮；垃圾渗滤液；生物脱氮；厌氧前反硝化中图分类号：X703.1文献标识码：A文章编号：1000-6923(2008)03-0225-04Highlyeffectivebiologicalnitrogenremovalfromhighammonialandfillleachate.ZHANGShu-jun1,2,WANGShu-ying1,MAOXin-wei1,HANXiao-yu3,ZENGWei1,PENGYong-zhen1*(1.SchoolofEnvironmentalandEnergyEngineering,BeijingUniversityofTechnology,Beijing100022,China；2.BeijingDrainageGroupCompanyLimited,Beijing100038,China；3.SchoolofMunicipalandEnvironmentalEngineering,HarbinInstituteofTechnology,Harbin150090,China).ChinaEnvironmentalScience,2008,28(3)：225~228Abatract：Atwo-stageUASB(UASB1+UASB2)-A/Osystemwasinvestigatedtoimprovenitrogenremovalefficiencyfromthelandfillleachatewithhigh-concentrationammonia.Twodifferentoperationalpatterns:denitrificationoccurringfirstlyintheUASB1(technique1)anddenitrificationonlyinA/Oanoxiczone(technique2)werecontrastivelystudied.Undertheconditionofrecirculationratio300%,ammonianitrificationefficiencyof2kindstechniquewasabout99%,butTNremovalefficiencyoftechnique1was21%higherthantechnique2.Thedifferenceofvariationruleofinorganiccarbon(IC)andpHvalueof2kindsoftechnologywasgreat.Technique1owingtoutilizingcompletelyrawwatercarbonsource,thehighlyeffectivedenitrificationwasobtained,ampleICandhigherpHvalueinsystemwasmaintained,andnitritationof75%~95%nitriteaccumulationefficiencywasrealized.Ableornoteffectivelyutilizingorganiccarbonsourcewasthebasicreasonofproducingvariationofnitrogenremoval.Keywords：high-concentrationammonia；landfillleachate；biologicalnitrogenremoval；anaerobicpre-denitrification在处理含高浓度氨氮的有机废水时,通常采用“厌氧+好氧”组合工艺,由厌氧反应器去除大部分有机物,在后