DONH4+-N调控实现MBBR工艺生活污水短程硝化

中国环境科学2017,37(12)：4511~4517ChinaEnvironmentalScienceDO/NH4+-N调控实现MBBR工艺生活污水短程硝化赵青,卞伟,李军*,赵昕燕,阚睿哲,王文啸,孙艺齐,梁东博,张舒燕(北京工业大学建筑工程学院,北京100124)摘要：选取溶解氧(DO)浓度和出水氨氮(NH4+-N)浓度作为控制因素,探究不同温度和有机碳源投加量(COD/NH4+-N)下,实现生物膜工艺短程硝化的可行性和对DO/NH4+-N值(R值)的需求.15,20,25℃时,实现短程硝化的R值分别约为0.08,0.17,0.25,说明比值控制可实现短程硝化,且R值的降低可弥补温度降低的不利影响;DO为3.5mg/L,NH4+-N浓度为14mg/L时,短程硝化实现,而DO和NH4+-N浓度分别为1.8,3mg/L,短程硝化破坏,说明实现生物膜反应器短程硝化,由DO/NH4+-N决定,而不仅仅是DO;有机碳源含量分别为0,60mg/L时,实现短程硝化的R值由0.25升至0.38,但R=0.6短程硝化破坏,说明投加有机碳源增多,R调控范围变大,便于实现短程硝化,但R增长幅度有限.关键词：DO/NH4+-N；比值控制；MBBR；短程硝化中图分类号：X703.5文献标识码：A文章编号：1000-6923(2017)12-4511-07DO/NH4+-NcontroltoachievepartialnitrificationofmunicipalwastewaterinMBBRprocess.ZHAOQing,BIANWei,LIJun*,ZHAOXin-yan,KANRui-zhe,WANGWen-xiao,SUNYi-qi,LIANGDong-bo,ZHANGShu-yan(CollegeofArchitectureandCivilEngineering,BeijingUniversityofTechnology,Beijing100124,China).ChinaEnvironmentalScience,2017,37(12)：4511~4517Abstract：Thispaperselectsthedissolvedoxygen(DO)concentrationandtheeffluentammoniaconcentration(NH4+-N)ascontrolfactors,exploringthefeasibilityofnitrificationandthevalueofDO/NH4+-N(R-value)inbiofilmprocessunderthedifferenttemperatureandorganiccarbonsourcedosage(COD/NH4+-N).At15,20,25℃,theDO/NH4+-Nvalueofpartialnitrificationwasabout0.08,0.17,0.25,respectively.Itshowsthatratiocontrolcanrealizepartialnitrification,andthereductionofRcanmakeupfortheadverseeffectoftemperaturereduction.WhentheconcentrationofDOwas3.5mg/Landtheammoniaconcentrationwas14mg/L,thepartialnitrificationwasachieved,whiletheconcentrationofDOandammoniarespectivelywas1.8mg/L,3mg/L,andthepartialnitrificationwasdestroyed,whichindicatedthattherealizationofpartialnitrificationinbiofilmreactorwasdecidedbyDO/NH4+-N,notjustDO.Theorganiccarboncontentwere0,60mg/Lrespectively,R-valueofpartialnitrificationincreasingfrom0.25to0.38,butthepartialnitrificationdamaginginR=0.6,whichillustratedthatthemoreorganiccarbonsourcewereadded,theregulationscopeofRisbroader,facilitatingtherealizationofpartialnitrification,buttheRamplificationislimited.Keyword