Specific activity of nitrifying biofilm in water nitrification process |
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| Affiliation: | 1. Department of Civil and Structural Engineering, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong;2. Unité de Recherche Traitement Biologique des Eaux, Département de Génie des Procédés Industriels, Institut National des Sciences Appliquées, 31077 Toulouse, France;1. Key Laboratory of Algal Biology of the Chinese Academy of Sciences, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China;2. University of Chinese Academy of Sciences, Beijing 100049, China;3. Egerton University, Department of Environmental Science, Egerton 536-20115, Kenya;1. European Regional Centre for Ecohydrology of the Polish Academy of Sciences, 3 Tylna, 90-364 ?ód?, Poland;2. Department of Applied Ecology, Faculty of Biology and Environmental Protection, University of ?ód?, 12/16 Banacha, 90-237 ?ód?, Poland;3. Institute of Medical Biology of the Polish Academy of Sciences, 106 Lodowa, 93-232, ?ód?, Poland;4. Department of Biochemistry and Cell Biology, Faculty of Biology and Agriculture, University of Rzeszów, 2 ?wiklińskiej, 35-601 Rzeszow, Poland;1. Service de parasitologie-mycologie, centre hospitalier universitaire Yalgado Ouédraogo, 03 BP 7022, Ouaga 03, Ouagadougou, Burkina Faso;2. Département des sciences biologiques appliquées, unité de formation et de recherche en sciences de la santé, université Ouaga I Joseph Ki-Zerbo, Ouagadougou, Burkina Faso;3. Département des sciences fondamentales et mixtes, Institut supérieur des sciences de la santé, université Polytechnique de Bobo-Dioulasso, Bobo-Dioulasso, Burkina Faso;4. École privée de santé sciences nouvelles (ESSN), Ouagadougou, Burkina Faso;5. Service de parasitologie-mycologie, centre hospitalier universitaire Souro Sanou, Bobo-Dioulasso, Burkina Faso;6. Centre hospitalier universitaire Charles-de-Gaulles, Ouagadougou, Burkina Faso;1. College of Chemistry and Chemical Engineering, Zunyi Normal University, Zunyi, 563002, PR China;2. School of Chemical Engineering, Sichuan University, Chengdu, 610065, PR China;3. School of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 400044, PR China;1. Department of Biomedical Sciences, Humanitas University, Pieve Emanuele–Milan, Italy;2. Sarcoma, Melanoma and Rare Tumors Surgery Unit, IRCCS Humanitas Research Hospital, Rozzano–Milan, Italy;3. Sarcoma Service, Department of Surgery, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy |
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| Abstract: | The effect of the accumulation of fixed biomass on the specific activity of nitrifying biofilm was studied in a continuous flow reactor. The specific activity of nitrifying biofilm was described by the specific removal rate of ammonium-N (qobs). The observed relationship between qobs and the film thickness was apparent to an inverse V-shaped curve. The maximum specific activity of biofilm was attained at a film thickness in the range 15–25 μm, at which a steady state was established in the liquid phase for different influent ammonium-N concentrations (S0). Beyond such a range, the specific activity began to decline significantly with the additional accumulation of biofilm. It was demonstrated from both experimental and theoretical approaches that reduction in the specific activity of biofilm was closely related to the ratio of active biomass to the accumulation of inactive materials within the biofilm. |
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