Journal Article10.1016/j.algal.2021.102588
Microalgal dewatering with focus on filtration and antifouling strategies: A review
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TL;DR: In this paper , the authors systematically reviewed and discussed the fouling phenomenon in the microalgal membrane filtration , considering the types and characteristics of foulants, the mechanism of fouling and the factors influencing membrane fouling.
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Abstract: Dewatering constitutes a major drawback in terms of cost and energy required to concentrate a highly diluted microalgal culture. This has hampered the economic viability of microalgal products. To this end, several technologies have been developed for harvesting microalgal biomass . Membrane technology emerges as one of the preferred harvesting and dewatering technologies in terms of low cost, simplicity of operation, energy demand and biomass recovery rate and efficiency. However, membrane fouling impedes the development and large-scale application of membrane technology. Here, we systematically reviewed and discussed the fouling phenomenon in the microalgal membrane filtration , considering the types and characteristics of foulants, the mechanism of fouling and the factors influencing membrane fouling. The state-of-the art strategies for mitigating membrane fouling are discussed, including cleaning of the fouled membrane, pretreatment of feed solution, optimization of membrane configuration and membrane surface modification. Since membrane fouling is the ultimate barrier in membrane filtration process , enhancing the fouling resistance characteristics of the membrane surface is identified and highlighted as the most promising fouling control strategy. However, more research is needed to develop durable fouling resistant membranes with enhanced stability over a long period of operation. • Microalgal dewatering is a major bottleneck to microalgae-based fuels. • Membrane filtration is an efficient technology for microalgal biomass recovery. • Fouling hinders the development and large-scale application of membrane technology. • Different membrane antifouling strategies are outlined in depth. • Surface modification is a promising antifouling approach for microalgal recovery.
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TL;DR: In this article , different lipid extraction techniques from B. braunii are discussed in depth, taking critical analysis of the effect of each process on hydrocarbon recovery and purity as well as their economic viability.
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Energy-efficient Membranes for Microalgae Dewatering: Fouling Challenges and Mitigation Strategies
TL;DR: In this article , the authors present state-of-the-art comprehensive strategies adopted to mitigate membrane fouling, such as imparting organic functional groups and inorganic nanoparticles.
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Nano-clay modified membranes: A promising green strategy for microalgal antifouling filtration.
TL;DR: Nano-clay modified membranes exhibit improved mechanical properties and fouling resistance, but aggregation and poor adhesion hinder their effectiveness; recent research aims to optimize nano-clay incorporation and mitigate fouling in microalgal harvesting applications.
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Biomass and hydrocarbon production from Botryococcus braunii: A review focusing on cultivation methods.
Ehsan Khorshidi Nazloo,Moslem Danesh,Mohammad-Hossein Sarrafzadeh,Navid R. Moheimani,Houda Ennaceri +4 more
TL;DR: This review assesses cultivation methods for Botryococcus braunii, a microalga producing renewable hydrocarbons, highlighting attached growth's advantages, including higher biomass productivity and reduced water requirements, for enhancing economic viability of microalgal fuels.
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