Journal ArticleDOI
Growth characteristic of anaerobic ammonium-oxidizing bacteria in an anaerobic biological filtrated reactor.
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TLDR
The results indicated that the anammox bacteria have higher growth rate than the reported value (doubling time, 11 days), and it was clearly demonstrated that nitrogen conversion rate was proportional to the population of anamm Oxidizing bacteria.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 1.1×106 and 1.7×107 cells/ml reactor, respectively. From these results, the doubling time of anammox bacteria was calculated as 1.8 days, and the specific growth rate (μ) 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.read more
Citations
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The inhibition of the Anammox process: A review
TL;DR: In this paper, a detailed review of previous researches on the inhibition of Anammox processes is presented, where the effect of inhibitory substances, such as substrates (ammonia and nitrite), organic matter (nontoxic organic matter and toxic organic matter), salts, heavy metals, phosphate and sulfide, are commonly present in the practical applications.
Journal ArticleDOI
The sociobiology of biofilms
TL;DR: It is argued that understanding this balance between competition and cooperation is central to building a complete and predictive model of biofilm formation, and it is concluded that the appearance of organization in biofilms can emerge without active coordination.
Journal ArticleDOI
Engineering aspects and practical application of autotrophic nitrogen removal from nitrogen rich streams
Stijn Van Hulle,Stijn Van Hulle,Helge Vandeweyer,Boudewijn Meesschaert,Peter A. Vanrolleghem,Peter A. Vanrolleghem,Pascal Dejans,Ann Dumoulin +7 more
TL;DR: In this article, an overview of the practical implementation of autotrophic nitrogen removal is presented, and the different nitrogen removal processes are compared in terms of operational conditions and a direction for future work is provided.
Journal ArticleDOI
The membrane bioreactor: a novel tool to grow anammox bacteria as free cells.
Wouter R. L. van der Star,Andreea I. Miclea,Andreea I. Miclea,Udo van Dongen,Gerard Muyzer,Cristian Picioreanu,Mark C.M. van Loosdrecht +6 more
TL;DR: In a membrane bioreactor (MBR), fast growth of anammox bacteria was achieved with a sludge residence time of 12 days, resulting in a—for anamm ox bacteria—unprecedented purity of the enrichment of 97.6%.
Journal ArticleDOI
Physiological and kinetic characterization of a suspended cell anammox culture
TL;DR: A membrane bioreactor (MBR) based method for growing a highly enriched anammox microbial community and the intrinsic nitrite half saturation constant was identified to be as low as 35 μg-N L(-)(1).
References
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Journal ArticleDOI
The sequencing batch reactor as a powerful tool for the study of slowly growing anaerobic ammonium-oxidizing microorganisms
TL;DR: It is suggested that the SBR could be used for the enrichment and quantitative study of a large number of slowly growing microorganisms that are currently out of reach for microbiological research.
Journal ArticleDOI
Anaerobic ammonium oxidation discovered in a denitrifying fluidized bed reactor
TL;DR: Anaerobic ammonium oxidation is a new process in which ammonium is oxidized with nitrate serving as the electron acceptor under anaerobic conditions, producing dinitrogen gas, and has been given the name ‘Anammox’ (anaerobic ammonia oxidation), and has be patented.
Book
Molecular Microbial Ecology Manual
TL;DR: The state-of-the-art methods described in MMEM-II have not only been provided by experts in the field, but in most cases by the laboratories that actually first developed and applied the methods, thus providing the MM EM-II user with unique first-hand tips and insight.
Journal ArticleDOI
Missing lithotroph identified as new planctomycete
Marc Strous,John A. Fuerst,Evelien H. M. Kramer,Susanne Logemann,Gerard Muyzer,Katinka T. van de Pas-Schoonen,Richard I. Webb,J. Gijs Kuenen,Mike S. M. Jetten +8 more
TL;DR: The discovery of this missing lithotroph and its identification as a new, autotrophic member of the order Planctomycetales, one of the major distinct divisions of the Bacteria makes an important contribution to the problem of unculturability.