Influence of dissolved oxygen concentration on nitrite accumulation in a biofilm airlift suspension reactor

被引:7
|
作者
Garrido, JM
vanBenthum, WAJ
vanLoosdrecht, MCM
Heijnen, JJ
机构
[1] DELFT UNIV TECHNOL, DEPT BIOCHEM ENGN, KLUYVER LAB BIOTECHNOL, NL-2628 BC DELFT, NETHERLANDS
[2] UNIV SANTIAGO COMPOSTELA, DEPT CHEM ENGN, SANTIAGO DE COMPOSTELA 15706, SPAIN
关键词
airlift reactor; BAS reactor; biofilm; nitrification; nitrite; oxygen transfer; residence time;
D O I
暂无
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
The biofilm airlift suspension (BAS) reactor can treat wastewater at a high volumetric loading rate combined with a low sludge loading. Two BAS reactors were operated, with an ammonium load of 5 kg N/(m(3) d), in order to study the influence of biomass and oxygen concentration on the nitrification process. After start-up the nitrifying biomass in the reactors gradually increased up to 30 g VSS/L. Due to this increased biomass concentration the gas-liquid mass transfer coefficient was negatively influenced. The resulting gradual decrease in dissolved oxygen concentration (over a 2-month period) was associated with a concomitantly nitrite build-up. Short term experiments showed a similar relation between dissolved oxygen concentration (DO) and nitrite accumulation. it was possible to obtain full ammonium conversion with approximately 50% nitrate and 50% nitrite in the effluent. The facts that (i) nitrite build up occurred only when DO dropped, (ii) the nitrite formation was stable over long periods, and (iii) fully depending on DO levels in short term experiments, red to the conclusion that it was not affected by microbial adaptations but associated with intrinsic characteristics of the microbial growth system. A simple biofilm model based on the often reported difference of oxygen affinity between ammonium and nitrite oxydizers was capable of adequately describing the phenomena. Measurements of biomass density and concentration are critical for the interpretation of the results, but highly sensitive to sampling procedures. Therefore we have developed an independent method, based on the residence time of Dextran Blue, to check the experimental methods. There was a good agreement between procedures. The relation between biomass concentration, oxygen mass transfer rate and nitrification in a BAS reactor is discussed. (C) 1997 John Wiley & Sons, Inc.
引用
收藏
页码:168 / 178
页数:11
相关论文
共 50 条
  • [41] Simultaneous nitrification/denitrification in a biofilm airlift suspension (BAS) reactor with biodegradable carrier material
    Walters, Evelyn
    Hille, Andrea
    He, Mei
    Ochmann, Clemens
    Horn, Harald
    WATER RESEARCH, 2009, 43 (18) : 4461 - 4468
  • [42] Comparison of influence of free ammonia and dissolved oxygen on nitrite accumulation between suspended and attached cells
    Chung, J
    Shim, H
    Lee, YW
    Bae, W
    ENVIRONMENTAL TECHNOLOGY, 2005, 26 (01) : 21 - 33
  • [43] Process design for nitrogen removal using nitrifying biofilm and denitrifying suspended growth in a biofilm airlift suspension reactor
    vanBenthum, WAJ
    vanLoosdrecht, MCM
    Heijnen, JJ
    WATER SCIENCE AND TECHNOLOGY, 1997, 36 (01) : 119 - 128
  • [44] Correlation between nitrite accumulation and the concentration of AOB in a nitritation reactor
    Jiyeol Im
    Jinyoung Jung
    Hyokwan Bae
    Daeik Kim
    Kyungik Gil
    Environmental Earth Sciences, 2014, 72 : 289 - 297
  • [45] Correlation between nitrite accumulation and the concentration of AOB in a nitritation reactor
    Im, Jiyeol
    Jung, Jinyoung
    Bae, Hyokwan
    Kim, Daeik
    Gil, Kyungik
    ENVIRONMENTAL EARTH SCIENCES, 2014, 72 (01) : 289 - 297
  • [46] A wastewater treatment using a biofilm airlift suspension reactor with biomass attached to supports: a numerical model
    Viotti, P.
    Luciano, A.
    Mancini, G.
    Torretta, V.
    INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY, 2014, 11 (03) : 571 - 588
  • [47] A wastewater treatment using a biofilm airlift suspension reactor with biomass attached to supports: a numerical model
    P. Viotti
    A. Luciano
    G. Mancini
    V. Torretta
    International Journal of Environmental Science and Technology, 2014, 11 : 571 - 588
  • [48] Nitrogen removal using nitrifying biofilm growth and denitrifying suspended growth in a biofilm airlift suspension reactor coupled with a chemostat
    Van Benthum, WAJ
    Derissen, BP
    Van Loosdrecht, MCM
    Heijnen, JJ
    WATER RESEARCH, 1998, 32 (07) : 2009 - 2018
  • [49] Monitoring the Impact of Dissolved Oxygen and Nitrite on Anoxic Biofilm in Continuous Denitrification Process
    Am Jang
    Yeonghee Ahn
    In S. Kim
    Environmental Monitoring and Assessment, 2003, 87 : 133 - 144
  • [50] Monitoring the impact of dissolved oxygen and nitrite on anoxic biofilm in continuous denitrification process
    Jang, A
    Ahn, Y
    Kim, IS
    ENVIRONMENTAL MONITORING AND ASSESSMENT, 2003, 87 (02) : 133 - 144