常温下短程硝化反硝化实验研究_徐鹏
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2020-01-25 14:52:54
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常温下短程硝化反硝化实验研究徐鹏1,何争光1,唐延杰1,安国安2(1.郑州大学水利与环境学院,河南郑州450001;2.河南省环境监测中心,河南郑州450004)[摘要]以人工模拟氨氮废水为研究对象,采用序批式活性污泥法,研究了实时控制条件下短程生物脱氮的实现及稳定性。结果表明:控制硝化过程中pH在7.7~8.6、DO在0.35~0.80mg/L,经过24d的运行,曝气结束时出水主要以亚硝酸盐为主。在此基础之上,逐渐提高曝气量、降低进水pH,短程硝化并没有被破坏,亚硝化率依然维持在70%以上。过度曝气6d之后,硝化类型由亚硝化率为90.7%的短程硝化转变为亚硝化率为40.7%的全程硝化。[关键词]序批式间歇反应器;短程硝化;氨氮废水[中图分类号]X703.1[文献标识码]B[文章编号]1005-829X(2011)11-0053-04StudyonshortcutnitrificationanddenitrificationatnormaltemperatureXuPeng1,HeZhengguang1,TangYanjie1,AnGuoan2(1.CollegeofWaterConservancyandEnvironmentalEngineering,ZhengzhouUniversity,Zhengzhou450001,China;2.HenanProvincialEnvironmentalMonitoringCenter,Zhengzhou450004,China)Abstract:Takingartificiallypreparedhighammonianitrogenwastewaterastheresearchobject,thesequencingbatchreactor(SBR)hasbeenusedforinvestigatingtheachievementsandstabilityofshortcutbiologicalnitrogenremovalunderreal-timecontrolconditions.TheexperimentalresultsindicatethatthepHinnitrificationprocessshouldbecontrolledat7.7-8.6,andDO0.35-0.80mg/L.Nitriteisthemainelementintheeffluentwhenaerationhasendedafterrunningfortwenty-fourdays.Basedonthis,graduallyincreasingaerationrate,andlowinginfluentpH,theshort-cutnitrificationisnotdestroyedandtherateofnitrosationremainsover70%.Afteroveraerationfor6d,astothenitrificationtype,theshortcutnitrificationwhoserateofnitrosationis90.7%changesintofullnitrifi-cationwhoserateofnitrosationis40.7%.Keywords:sequencingbatchreactor;shortcutnitrification;ammonianitrogenwastewater传统的硝化反硝化脱氮工艺是通过硝化过程使氨氮转化为NO3--N,然后通过反硝化过程使NO3--N还原为N2来降低处理水中TN浓度。国内外的很多研究表明,可以通过控制硝化过程,使微生物氧化氨氮生成中间体NO2--N,然后利用NO2--N进行还原反应生成N2,即短程硝化反硝化〔1-2〕。与传统的硝化反硝化相比,短程硝化反硝化具有以下优点〔3〕:可节省供氧量约25%,能耗低;可节省反硝化碳源约BioresourceTechnology,2004,94(2):107-112.[8]ChenYiliang,PanBingcai,ZhangQuanxing,etal.Treatmentofwastewaterfrombenzylalcoholproductionwithresinadsorption[J].JournalofChemicalIndustryandEngineering,2007,58(5):1220-1224.[9]ZhangQuanxing,ChenJinliong,XuZhaoyi,etal.Applicationofpolymericresinadsorbentinorganicchemicalwastewatertreatmentandresourcesreu
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