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Continuous photosynthetic abatement of CO2 and volatile organic compounds from exhaust gas coupled to wastewater treatment: Evaluation of tubular algal-bacterial photobioreactor
Mälardalen University, School of Business, Society and Engineering, Future Energy Center. University of Valladolid, Dr. Mergelina s/n, Valladolid, Spain.ORCID iD: 0000-0002-0137-2194
University of Valladolid, Dr. Mergelina s/n, Valladolid, Spain.
University of Valladolid, Dr. Mergelina s/n, Valladolid, Spain.
University of Valladolid, Dr. Mergelina s/n, Valladolid, Spain.
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2017 (English)In: Journal of CO2 Utilization, ISSN 2212-9820, E-ISSN 2212-9839, Vol. 21, 353-359 p.Article in journal (Refereed) Published
Abstract [en]

The continuous abatement of CO2 and toluene from the exhaust gas by an indigenous microalgal-bacterial consortium was investigated in a pilot tubular photobioreactor interconnected to an absorption column using diluted centrate in seawater as a free nutrient source. The removal efficiency of CO2 and toluene was maximised in the vertical absorption column by identifying an optimum liquid to gas (L/G) ratio of 15. The photobioreactor supported steady-state nitrogen and phosphorus removals of 91 ± 2% and 95 ± 4% using 15% diluted centrate at 14 and 7 d of hydraulic retention time (HRT), respectively. A decrease in the removal efficiencies of nitrogen (36 ± 5%) and phosphorus (58 ± 10%) was recorded when using 30% diluted centrate at 7 d of HRT. The volumetric biomass productivities obtained at an HRT of 7 d accounted for 42 ± 11 and 80 ± 3 mg TSS L-1 d-1 using 15 and 30% centrate, respectively. Stable CO2 (76 ± 7%) and toluene removals (89 ± 5%) were achieved at an L/G ratio of 15 regardless of the HRT or centrate dilution. Hence, this study demonstrated the potential of algal-bacterial systems for the continuous removal of CO2 and volatile organic compounds from exhaust gas coupled with the simultaneous treatment of centrate. 

Place, publisher, year, edition, pages
Elsevier Ltd , 2017. Vol. 21, 353-359 p.
National Category
Water Treatment Renewable Bioenergy Research
Identifiers
URN: urn:nbn:se:mdh:diva-36676DOI: 10.1016/j.jcou.2017.07.016ISI: 000411443200040Scopus ID: 2-s2.0-85029771500OAI: oai:DiVA.org:mdh-36676DiVA: diva2:1147553
Available from: 2017-10-06 Created: 2017-10-06 Last updated: 2017-10-12Bibliographically approved

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CiteExportLink to record
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