应用MBBR进行PU合成革废水的脱氮研究

INDUSTRIALWATER＆WASTEWATER工业用水与废水Vo1．47No．1Feb．，2016应用MBBR进行PU合成革废水的脱氮研究王庆，丁原红，任洪强，刘敏敏，钱翌(1．南京大学环境学院，南京210046；2．青岛科技大学环境学院，山东青岛266000)摘要：采用一个缺氧／好氧MBBR反应器考察其对TN、NH3-N和有机物的去除，同时采用另一个缺氧MBBR反应器。考察其对NO3-一N的去除。试验结果表明：当进水TN的质量浓度为150～300mg／L，NH3-N的质量浓度为50mg／L浓度时，缺氧／好氧MBBR对TN和NH厂N的平均去除率大于89．7％和84．0％，出水TN和NH3一N均能达到GB21902-2008(合成革与人造革工业污染物排放标准》中规定的要求(p(NH3-N)<8mg／L，P(TN)<15mg／L)。当碳氮比较低时，产生NO2-_N的积累，对缺氧／好氧MBBR处理合成革废水而言，维持其碳氮比在3．5左右即可实现有效脱氮。缺氧MBBR反硝化能去除约98．2％的NO3--N和NO2一_N，初始时碳氮比较低，产生NO2--N的积累．当碳氮比继续升高时，TN浓度下降，说明当NO，一一N的质量浓度高达300mg／L时，缺氧MBBR的反硝化效果显著。关键词：合成革废水；MBBR；脱氮中图分类号：X703．1；X794．031文献标识码：A文章编号：1009—2455(2016)01—0017—04NitrogenremOvalofwastewaterfrOmPUsyntheticleatherproductionbyMBBRWANGQing，DINGYuan-hong，RENHong-qiang，LIUMin—min，QIANYi(J．StateKeyLaboratoryofPollutionControlandResourcesReuse，NanjingUnwenit~Nanjing210046,China；2．SchoolofEnvironmentandSafetyEn~neenng,QingdaoUniversityofScienceandTechnology,Qingdao266000,China)Abstract：Anoxic—aerobicMBBRwasusedtoremoveTN，NH3一Nandorganicmatters，whileanoxicMBBRwasusedtoremoveNO__N．Thetestresultsshowedthat，whenthemassconcentrationsofTNandNH3一Noftheinfluentwaterwere150～300and50mg／Lrespectively，theremovalratesofthembyanoxic—aerobicMBBRwereabove89．7％and84．O％respectively，theefiuentwaterqualitycouldmeettherelevantrequirementofGB21902-2008EmissionStandardofPollutantsforSyntheticLeatherandArtificialLeatherIndustry(NH3一N)<8mg／L，P(TN)<15mg／L)．Aslowcarbon-nitrogenratiocouldresultinNO2一Naccumulation，maintainingcarbon—-nitrogenratioatabout3．5duringtheprocessofPUsyntheticleatherwastewatertreatmentbyMBBRcouldrealizeaneffe：ctiveremovalofnitrogen．Ontheotherhand，about98．2％ofNO3__NandNO2--Nwerere—movedbyanoxicMBBR，whenthecarbon—nitrogenratiowaslow，NO2--Naccumulationwasexist；however，whenthecarbon—nitrogenratiowasincreasingcontinuously，theTNconcentrationdecreased，whichindicatedthat，anoutstandingdenitrificationperformanceoftheanoxicMBBRcouldbeobtainedwhenthemassconcentrationofnitrateni~ogenwasashJghas300mg／L．Keywords：wastewaterfromPUsyntheticleatherp