反硝化深床滤池的菌群培养与运行条件优化
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摘要
以南通市某污水厂二级生化出水为原水,采用中试规模的反硝化深床滤池进行生物处理,重点考察了反硝化深床滤池夏、冬季节的菌群培养条件,硝态氮去除效果及滤速对硝态氮去除率的影响,并确定了深床滤池的设计和运行参数。结果表明,以恒定滤速、连续进水的自然挂膜方式进行培菌,在水温为23℃、碳源充足的情况下,无需污泥接种,历时20 d菌群培养成功。反硝化深床滤池在冬季适宜以低滤速运行,夏季则可适应高滤速运行。
A pilot scale deep-bed denitrification biofilter (DNBF) was used for the biological treatment of the secondary biochemical effluent of a municipal wastewater treatment plant in Nantong. The bacterial cultivation conditions of DNBF in both summer and winter as well as the effect of filtration rate on the removal of nitrate nitrogen were investigated. Additionally,the design and operation parameters of DNBF were determined. The results showed that the bacterial cultivation was successful with constant filtration rate and continuous inflow. The cultivation period was 20 days and the water temperature was 23 ℃. The carbon source was sufficient and sludge inoculation was not needed. The filter was run at low filtration rate in winter and could be adapt to high filtration rate in summer.
A pilot scale deep-bed denitrification biofilter (DNBF) was used for the biological treatment of the secondary biochemical effluent of a municipal wastewater treatment plant in Nantong. The bacterial cultivation conditions of DNBF in both summer and winter as well as the effect of filtration rate on the removal of nitrate nitrogen were investigated. Additionally,the design and operation parameters of DNBF were determined. The results showed that the bacterial cultivation was successful with constant filtration rate and continuous inflow. The cultivation period was 20 days and the water temperature was 23 ℃. The carbon source was sufficient and sludge inoculation was not needed. The filter was run at low filtration rate in winter and could be adapt to high filtration rate in summer.
引文
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[2]Dong W Y,Zhang X B,Wang H J,et al.Enhanced denitrification with external carbon sources in a biological anoxic filter[J].Water Sci Technol,2012,66(10):2243-2250.
[3]Chen F Y,Liu Y Q,Tay J H,et al.Alternating anoxic/oxic condition combined with step-feeding mode for nitrogen removal in granular sequencing batch reactors(GSBRs)[J].Sep Purif Technol,2013,105(5):63-68.
[4]Parastar S,Nasseri S,Borji S H,et al.Application of Agdoped Ti O2nanoparticle prepared by photodeposition method for nitrate photocatalytic removal from aqueous solutions[J].Desalination and Water Treatment,2013,51(37/39):7137-7144.
[5]石东,丁磊,董良飞.反硝化生物滤池脱氮的中试研究[J].中国给水排水,2017,33(1):43-47.Shi Dong,Ding Lei,Dong Liangfei.Pilot study on denitrification biofilter for nitrogen removal[J].China Water&Wastewater,2017,33(1):43-47(in Chinese).
[6]李新凯,郑春华.双层填料反硝化深床滤池脱氮的研究[J].中国给水排水,2017,33(7):94-96.Li Xinkai,Zheng Chunhua.Denitrification of dual packing denitrification deep bed filter[J].China Water&Wastewater,2017,33(7):94-96(in Chinese).
[7]周永刚.反硝化生物滤池在污水厂升级改造中的应用[J].中国给水排水,2014,30(24):49-52.Zhou Yonggang.Application of denitrification biofilter in upgrading of sewage treatment plants[J].China Water&Wastewater,2014,30(24):49-52(in Chinese).
[8]韩剑宏,刘燕,朱浩君,等.反硝化生物滤池的自然挂膜启动研究[J].中国给水排水,2015,31(3):1-4.Han Jianhong,Liu Yan,Zhu Haojun,et al.Biofilm formation and startup in denitrification biofilter[J].China Water&Wastewater,2015,31(3):1-4(in Chinese).
[9]Randall C W,Buth D.Nitrite build-up in activated sludge resulting from temperature effects[J].Journal of Water Pollution Control Federation,1984,56(9):1039-1044.
[10]胡友彪,张文涛,黄州满.温度对MBBR和A/O工艺中污染物去除效果的比较[J].环境科学与技术,2012,35(2):178-181.Hu Youbiao,Zhang Wentao,Huang Zhouman.Comparison of effect of temperature on MBBR and A/Oprocess for sewage treatment[J].Environmental Science&Technology,2012,35(2):178-181(in Chinese).
[11]Head M A,Oleszkiewicz J A.Bioaugmentation for nitrification at cold temperatures[J].Water Res,2004,38(3):523-530.
[12]Mauret M,Paul E,Puech-Costes E,et al.Application of experimental research methodology to the study of nitrification in mixed culture[J].Water Sci Technol,1996,34(1/2):245-252.
[13]游佳,吴金香,郑兴灿.A2/O型氧化沟工艺中硝化速率的变化特征研究[J].中国给水排水,2011,27(19):75-77.You Jia,Wu Jinxiang,Zheng Xingcan.Study on variation characteristic of nitrification rate of activated sludge in A2/O type oxidation ditch process[J].China Water&Wastewater,2011,27(19):75-77(in Chinese).
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