Open Access
Bioflocculation of microalgae and bacteria combined with flue gas to improve sewage treatment
TLDR
In this paper, 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.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 (NOx, SOx) 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% CO2, 87 ± 5% NOx and 99 ± 1% SO2. 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.read more
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Journal Article
Dewatering of microalgal cultures : a major bottleneck to algae-based fuels
TL;DR: In this paper, various technologies currently used for dewatering microalgal cultures along with a comparative study of the performances of the different technologies are reviewed and compared, as well as a comparison of the performance of different technologies.
Journal ArticleDOI
Harvesting techniques applied to microalgae: A review
TL;DR: In this article, the main harvesting processes applied to microalgae, presenting the main advantages and disadvantages of each method, to allow the selection of an appropriate procedure to effectively separate microalgal biomass from the culture medium.
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A review of the harvesting of micro-algae for biofuel production
John J. Milledge,Sonia Heaven +1 more
TL;DR: There appears to be no one method or combination of harvesting methods suited to all micro-algae and harvesting method will have a considerable influence on the design and operation of both upstream and downstream processes in an overall micro-algal biofuel production process.
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A review on the use of microalgal consortia for wastewater treatment
TL;DR: An updated review of the literature regarding the application of microalgal consortia in the remediation of wastewaters from different sources is provided, focusing on the mechanisms involved in nutrients removal by microalgae and the main interactions established between the microorganisms integrating the Consortia and how they can influence nutrients removal efficiencies.
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Dual purpose microalgae-bacteria-based systems that treat wastewater and produce biodiesel and chemical products within a biorefinery.
TL;DR: A Biorefinery design is presented that integrates the treatment of municipal wastewater with the recovery of oleaginous microalgae with potential for biodiesel production, together with the use of seawater supplemented with anaerobically digested piggery waste for cultivating Arthrospira and producing biogas, biodiesel, hydrogen and other high added value products.
References
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E. G. Bligh,W. J. Dyer +1 more
TL;DR: The lipid decomposition studies in frozen fish have led to the development of a simple and rapid method for the extraction and purification of lipids from biological materials that has been applied to fish muscle and may easily be adapted to use with other tissues.
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Liliana Rodolfi,Graziella Chini Zittelli,Niccolò Bassi,Giulia Padovani,Natascia Biondi,Gimena Bonini,Mario R. Tredici +6 more
TL;DR: The experiments showed that the eustigmatophyte Nannochloropsis sp.
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