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Optimising an outdoor membrane photobioreactor for tertiary sewage treatment

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Optimising an outdoor membrane photobioreactor for tertiary sewage treatment

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dc.contributor.author	González-Camejo, J.
dc.contributor.author	Jiménez Benítez, Antonio Luis
dc.contributor.author	Ruano, M. Victoria
dc.contributor.author	Robles Martínez, Ángel
dc.contributor.author	Barat, Ramón
dc.contributor.author	Ferrer Polo, José
dc.date.accessioned	2020-04-08T14:52:16Z
dc.date.available	2020-04-08T14:52:16Z
dc.date.issued	2019
dc.identifier.citation	González-Camejo, J. Jiménez Benítez, Antonio Luis Ruano, M. Victoria Robles Martínez, Ángel Barat, Ramón Ferrer Polo, José 2019 Optimising an outdoor membrane photobioreactor for tertiary sewage treatment Journal of Environmental Management 245 76 85
dc.identifier.uri	https://hdl.handle.net/10550/73847
dc.description.abstract	The operation of an outdoor membrane photobioreactor plant which treated the effluent of an anaerobic membrane bioreactor was optimised. Biomass retention times of 4.5, 6, and 9 days were tested. At a biomass retention time of 4.5 days, maximum nitrogen recovery rate:light irradiance ratios, photosynthetic efficiencies and carbon biofixations of 51.7 ± 14.3 mg N·mol−1, 4.4 ± 1.6% and 0.50 ± 0.05 kg CO2·m3influent, respectively, were attained. Minimum membrane fouling rates were achieved when operating at the shortest biomass retention time because of the lower solid concentration and the negligible amount of cyanobacteria and protozoa. Hydraulic retention times of 3.5, 2, and 1.5 days were tested at the optimum biomass retention times of 4.5 days under non-nutrient limited conditions, showing no significant differences in the nutrient recovery rates, photosynthetic efficiencies and membrane fouling rates. However, nitrogen recovery rate:light irradiance ratios and photosynthetic efficiency significantly decreased when hydraulic retention time was further shortened to 1 day, probably due to a rise in the substrate turbidity which reduced the light availability in the culture. Optimal carbon biofixations and theoretical energy recoveries from the biomass were obtained at hydraulic retention time of 3.5 days, which accounted for 0.55 ± 0.05 kg CO2·m−3influent and 0.443 ± 0.103 kWh·m−3influent, respectively.
dc.language.iso	eng
dc.relation.ispartof	Journal of Environmental Management, 2019, vol. 245, p. 76-85
dc.subject	Enginyeria ambiental
dc.subject	Microorganismes
dc.subject	Biomassa
dc.subject	Aigües residuals Plantes de tractament
dc.title	Optimising an outdoor membrane photobioreactor for tertiary sewage treatment
dc.type	journal article	es_ES
dc.date.updated	2020-04-08T14:52:16Z
dc.identifier.doi	10.1016/j.jenvman.2019.05.010
dc.identifier.idgrec	137470
dc.rights.accessRights	open access	es_ES