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Bioflocculation of microalgae and bacteria combined with flue gas to improve sewage treatment

Sofie Van Den Hende (UGent) , Han Vervaeren (UGent) , Sem Desmet and Nico Boon (UGent)
(2011) NEW BIOTECHNOLOGY. 29(1). p.23-31
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Abstract
Although microalgae are promising for a cradle-to-cradle design approach of sewage treatment, their application is hampered by high harvesting costs and low C:N ratios of sewage. Therefore, the potential of microalgal bacterial flocs (MaB-flocs) was investigated for the secondary treatment of sewage supplemented with different flue gas flow rates (FGFRs) from a coal power plant. Effluent (N, P, turbidity and pH) and off gas discharge levels (NO(x), SO(x)) met the European discharge limits with a hydraulic retention time of only 0.67 days and an FGFR of 0.6 L h(-1) (0.0025 vvm). This FGFR provided sufficient carbon and resulted in removal efficiencies of 48 +/- 7% CO(2), 87 +/- 5% NO(x) and 99 +/- 1% SO(2). MaB-flocs settled fast reaching up to a density of 19 g VSS L(-1). High biomass productivities (0.18 g L(-1) day(-1)) were obtained under a low light intensity. This successful reactor performance indicates the large potential for the industrial application of MaB-flocs for flue gas sparged sewage treatment.
Keywords
PHOTOBIOREACTOR, ALGAE, EXTRACTION, AIR, REMOVAL, CARBON-DIOXIDE, WASTE-WATER TREATMENT, NITRIC-OXIDE

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Chicago
Van Den Hende, Sofie, Han Vervaeren, Sem Desmet, and Nico Boon. 2011. “Bioflocculation of Microalgae and Bacteria Combined with Flue Gas to Improve Sewage Treatment.” New Biotechnology 29 (1): 23–31.
APA
Van Den Hende, S., Vervaeren, H., Desmet, S., & Boon, N. (2011). Bioflocculation of microalgae and bacteria combined with flue gas to improve sewage treatment. NEW BIOTECHNOLOGY, 29(1), 23–31. Presented at the 14th International Biotechnology Symposium and Exhibition.
Vancouver
1.
Van Den Hende S, Vervaeren H, Desmet S, Boon N. Bioflocculation of microalgae and bacteria combined with flue gas to improve sewage treatment. NEW BIOTECHNOLOGY. 2011;29(1):23–31.
MLA
Van Den Hende, Sofie, Han Vervaeren, Sem Desmet, et al. “Bioflocculation of Microalgae and Bacteria Combined with Flue Gas to Improve Sewage Treatment.” NEW BIOTECHNOLOGY 29.1 (2011): 23–31. Print.
@article{1213864,
  abstract     = {Although microalgae are promising for a cradle-to-cradle design approach of sewage treatment, their application is hampered by high harvesting costs and low C:N ratios of sewage. Therefore, the potential of microalgal bacterial flocs (MaB-flocs) was investigated for the secondary treatment of sewage supplemented with different flue gas flow rates (FGFRs) from a coal power plant. Effluent (N, P, turbidity and pH) and off gas discharge levels (NO(x), SO(x)) met the European discharge limits with a hydraulic retention time of only 0.67 days and an FGFR of 0.6 L h(-1) (0.0025 vvm). This FGFR provided sufficient carbon and resulted in removal efficiencies of 48 +/- 7\% CO(2), 87 +/- 5\% NO(x) and 99 +/- 1\% SO(2). MaB-flocs settled fast reaching up to a density of 19 g VSS L(-1). High biomass productivities (0.18 g L(-1) day(-1)) were obtained under a low light intensity. This successful reactor performance indicates the large potential for the industrial application of MaB-flocs for flue gas sparged sewage treatment.},
  author       = {Van Den Hende, Sofie and Vervaeren, Han and Desmet, Sem and Boon, Nico},
  issn         = {1871-6784},
  journal      = {NEW BIOTECHNOLOGY},
  keyword      = {PHOTOBIOREACTOR,ALGAE,EXTRACTION,AIR,REMOVAL,CARBON-DIOXIDE,WASTE-WATER TREATMENT,NITRIC-OXIDE},
  language     = {eng},
  location     = {Rimini, Italy},
  number       = {1},
  pages        = {23--31},
  title        = {Bioflocculation of microalgae and bacteria combined with flue gas to improve sewage treatment},
  url          = {http://dx.doi.org/10.1016/j.nbt.2011.04.009},
  volume       = {29},
  year         = {2011},
}

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