木质框架土壤渗滤系统处理养猪废水厌氧消化液的效能
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2020-04-10 21:11:10
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第66卷第6期2015年6月化工CIESC学报Journal、,01.66NO.6June2015木质框架土壤渗滤系统处理养猪废水厌氧消化液的效能赵博玮,李建政,邓凯文,孟佳(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)摘要:为处理高氨氮、低C/N比的养猪废水厌氧消化液,构建了具有缓释碳源特性的木质框架土壤渗滤系统(WFS0,并通过运行测试了进水浓度和表面水力负荷(SHL)对系统处理效能的影响。在SHL为O.2121·m-·d-条件下,当进水COD和NHa-N平均浓度分别从152和175.5mg·L提高到421和788.7mg·L时,系统对COD的去除率从52.3%提高到61.2%,NH4-N去除率从84.2%下降到61.5%,TN去除率从28.6%提高到了33.5%,NH4一N和TN去除负荷分别达到了75.5和41.7g·m-·d-。当SHL提高为0.321T10·rn-·d-时,系统仍能维持运行,但处理效能受到显著影响。在进水COD和NH4-N分别为265和465mg·L左右时,COD、NHa-N及TN的去除率分别平均为56.5%、53.3%和20.9%。木质填料及其附着层形成的NH4.N浓度梯度,可使系统承受较高的SHL的同时获得缓释碳源,并保护氨氧化细菌免受自由氨毒性。关键词:养猪废水;厌氧消化液;废物处理;填充床;渗透;脱氮DOI:10.119494.issn.0438—1157.201501ll中图分类号:X703.1文献标志码:A文章编号:0438一l157(2015)06—2248—08Eficiencyofwood--chip-·frameworksoilinfiltrationsystemintreatinganaerobicallydigestedswinewastewaterZHAOBowei,LIJianzheng,DENGKaiwen,MENGJia(StateKeyLaboratoryofUrbanWaterResourceandEnvironment,HarbinInstituteofTechnology,Harbin150090,Heilongfiang,China)Abstract:Awood.chip—frameworksoilinfiltratorfWFSI)withslow.releaseofcarbonsourcewasconstructedandusedtotreatananaerobicallydigestedswinewastewatercharacterizedwithhighNH4-NandlOWC/Nratio.PollutantremovalemciencyoftheS1wasinvestigatedundervariousinfluentconcentrationandvaryingsurfacehydraulic1oad(SHL).UnderSHLof0.2m·In_·d_.influentaveragedCODandNH4-Nincreasedfrom152andl75.5mg·L~to421and788.7mg·L~。respectively.TheresultantCOD,NH4.NandTNremovalbythesystemwas52.3%tO61.2%.84.2%tO61.5%and28.6%tO33.5%,respectively.Meanwhile,NH4一NandTNremovalloadingreached75.5and41.7g·n1_·(r_,respectively.ThoughSHLwasashighas0.32rnj·n1-·(|_,thesystemstil1performedbutitseficiencywasremarkablyinfluenced.WheninfluentCODandNH4一Nwasaround265and465mg·L~,COD,NH.NandTNremovalwasabout56.5%,53.3%and20.9%,respectively.Thewoodcarrierobservablyworkedasaslow.releasecarbonsource,andprotectedtheammoniaoxidizingbacteriafromfreeammoniatoxicityduetotheconcentrationgradientofNH'4-Nintheadhesivelayers.2015.01.22收到初稿,2015.03—07收到修改稿。联系人:李建政。第一作者:赵博玮(1984~),男,博士研究生。基金项目:黑龙江省应用技术研究与开发计划项目(GC13C303);国家
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