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Oscillating conditions for influencing the composition of mixed biological cultures

1998; Pergamon Press; Volume: 37; Issue: 4-5 Linguagem: Inglês

10.1016/s0273-1223(98)00117-6

1996-9732

Bjarne R. Horntvedt, Morten Rambekk, Rune Bakke,

Wastewater Treatment and Nitrogen Removal

Research Article| February 01 1998 Oscillating conditions for influencing the composition of mixed biological cultures Bjarne R. Horntvedt; Bjarne R. Horntvedt *Institutt for Energiteknikk (IFE), Box 40, 2007 Kjeller, Norway Search for other works by this author on: This Site PubMed Google Scholar Morten Rambekk; Morten Rambekk **Telemark Technological R&D Centre (Tel Tek), Kjølnes Ring 56, 3914 Porsgrunn, Norway Telemark College, Institute for Environmental Tech., Kjølnes Ring 56, 3914 Porsgrunn, Norway Search for other works by this author on: This Site PubMed Google Scholar Rune Bakke Rune Bakke *Institutt for Energiteknikk (IFE), Box 40, 2007 Kjeller, Norway Search for other works by this author on: This Site PubMed Google Scholar Water Sci Technol (1998) 37 (4-5): 259–262. https://doi.org/10.2166/wst.1998.0640 Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Cite Icon Cite Permissions Search Site Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentAll JournalsThis Journal Search Advanced Search Citation Bjarne R. Horntvedt, Morten Rambekk, Rune Bakke; Oscillating conditions for influencing the composition of mixed biological cultures. Water Sci Technol 1 February 1998; 37 (4-5): 259–262. doi: https://doi.org/10.2166/wst.1998.0640 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex This paper presents a strategy in which mixed biological cultures are exposed to oscillating concentration levels, to improve the potential for coexistence of desired bacterial species. A mechanistic mathematical model is constructed to investigate and illustrate this strategy. This paper is focused on competition between nitrifying, denitrifying and aerobic heterotrophic bacteria in a CSTR with sludge recycle. For nitrifying and aerobic heterotrophic cultures, the effect of sinusoidal oscillations in DO levels with an amplitude of 1.0 mg/l is a 16% specific growth rate reduction compared to that at a constant DO level. The denitrifiers growth rate is increased by an average of 59%, compared to the constant DO level situation. A similar strategy has been tested in a pilot plant. It is concluded that the influence on specific growth rates is a function of the amplitude of the oscillations. The effects are greatest when concentrations fluctuate around the half saturation concentration of the rate limiting component(s). Bioreactors, mixed biological cultures, oscillations, specific growth rate, wastewater treatment This content is only available as a PDF. © IWA Publishing 1998 You do not currently have access to this content.