Journal
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
Volume 24, Issue -, Pages 425-437Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.algal.2016.10.026
Keywords
Aeration; Hydraulic retention time; Membrane flux; Nutrient removal; Solids retention time
Categories
Funding
- Australian Postgraduate Award
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This review focuses on the potential advantages and challenges of submerged membrane photobioreactors (MPBRs) for microalgae cultivation and wastewater treatment. MPBR technology combines a conventional photobioreactor (PBR) with a membrane process to grow microalgae, enabling complete retention of algal biomass. Microalgae populations in MPBRs are affected by a number of factors, including wastewater characteristics and operational conditions. Although the wastewater types used in previous MPBR studies varied significantly in terms of composition, especially nitrogen (7.5 to 25 mg/L) and phosphorus (0.15 to 20 mg/L) concentrations, general trends and some optimised operating conditions can now be defined. Individual parameters, including hydraulic retention time (HRT), solids retention time (SRT), lighting, aeration, temperature, and pH were all found to be important factors affecting process efficiency; furthermore, there is evidently complex inter-relationships between these parameters, which should not be overlooked during MPBR design. Membrane fouling is still considered an operational challenge, with previous studies focusing on the relationship between membrane performances and algal organic matter. Applying immobilised microalgal technology to MPBRs has the potential to enhance productivity and mitigate fouling. (C) 2016 Elsevier B.V. All rights reserved.
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