Category Archives: Biomass and Biofuels from Microalgae

Network Refinement and Gap Filling

Network refinement (Fig. 10.3c) can be viewed as reconciliation between the content of the model and the available biochemical and genomic data, with the end result of enhancing the reconstructed network. This reconciliation is done based on agreements of model simulations and updated genomics, physiological, and bio­chemical knowledge. A crucial step in the reconstruction of genome-scale meta­bolic models is filling […]

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Industrial-scale Microalgae Pond Primary Dewatering Chemistry for Energy-efficient Autoflocculation

Patrick V. Brady, Mark P. McHenry, M. Carolina Cuello and Navid R. Moheimani Abstract Industrial-scale microalgae production will likely require large energy­intensive technologies for both culture and biomass recovery; energy-efficient and cost-effective microalgae dewatering and water management are major challenges. Primary dewatering is typically achieved through flocculation followed by sepa­ration via settling or flotation. Flocculants are relatively expensive, and their […]

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Ethanol from Blue-Green Algae (Cyanobacteria)

Algenol (Florida, USA) has been continually refining a process for continuous growth and harvest of ethanol excreted by modified cyanobacteria. In this process, ethanol is released by the organism in the vapour phase and then captured for extraction using a novel distillation process, eventually the spent microalgae bio­mass is converted to fuel using a variant of the HTL process. Algenol […]

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Wastewater as a Source of Nutrients for Microalgal Biomass Production

Many industries and human activities generate wastewater, and as a consequence, there are many different types of wastewaters, each with a different chemical composition and volumetric production over time. Table 5.1 gives an overview of different types of wastewaters and their content of N and P. The two major sources of wastewater are domestic wastewater and wastewater derived from animal […]

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Strategies to Improve Gene Expression Levels

Fusion Proteins Specific regions within the coding regions of chloroplast genes enhance efficient expression of foreign genes in plants and algae (Anthonisen et al. 2002; Gray et al. 2009; Kuroda and Maliga 2001b). Genetic fusion of endogenous regions to an exogenous protein of interest may represent another effective strategy for high-level transgene expression (Gray et al. 2011; Kasai et al. […]

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Chemical Flocculation

Chemical flocculation adds flocculating and/or coagulating agents to the culture medium to speed cell aggregation. This process is often used with microalgae as a pretreatment in combination with other processes such as dissolved air flotation (DAF). While this improves the speed at which the cells are collected, it has the added complication of dosing chemicals at a specific desired concentration […]

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The Future Prospects of Anaerobic Digestion in Microalgae Production

Current development of new anaerobic digester designs and configurations can play an important role in the future of hybrid microalgae production and anaerobic digestion facilities. New digester reactor designs that decouple the hydraulic and solid retention times can be extremely beneficial for anaerobic digestion of micro­algae (Ward et al. 2014) and can be achieved by upflow anaerobic sludge blanket reactors, […]

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