title: Growth characteristic of anaerobic ammonium-oxidizing bacteria in an anaerobic biological filtrated reactor.
abstract: The doubling time of anaerobic ammonium-oxidizing (anammox) bacteria in an anaerobic biological filtrated (ABF) reactor was determined. Fluorescence in situ hybridization analysis was used to detect and count anammox bacteria cells in anammox sludge. As a result, the populations of anammox bacteria at 14th and 21st days were 1.1 x 10(6) and 1.7 x 10(7) cells/ml reactor, respectively. From these results, the doubling time of anammox bacteria was calculated as 1.8 days, and the specific growth rate (mu) was 0.39 day(-1). This result indicated that the anammox bacteria have higher growth rate than the reported value (doubling time, 11 days). Furthermore, it was clearly demonstrated that nitrogen conversion rate was proportional to the population of anammox bacteria. Maintaining the ideal environment for the growth of anammox bacteria in the ABF reactor might lead to faster growth. This is the first report of the growth rate of anammox bacteria based on the direct counting of anammox bacteria.
authors: Hitachi Plant Engineering and Construction Co., Ltd., Kami-Honga 537, Matsudo, Chiba, 271-0064, Japan.
authors: Kazuichi
authors: K
authors: Isaka
authors: Yasuhiro
authors: Y
authors: Date
authors: Tatsuo
authors: T
authors: Sumino
authors: Sachiko
authors: S
authors: Yoshie
authors: Satoshi
authors: S
authors: Tsuneda
mesh_terms: D000693:Anaerobiosis; D001419:Bacteria / Q000378:metabolism*; D001673:Biodegradation, Environmental; D019149:Bioreactors; D010084:Oxidation-Reduction; D000644:Quaternary Ammonium Compounds / Q000378:metabolism*; D012722:Sewage; D013379:Substrate Specificity; D013997:Time Factors
chemical_list: D000644:Quaternary Ammonium Compounds; D012722:Sewage