By Debabrata Das
This publication severely discusses assorted points of algal construction structures and several other of the drawbacks regarding microalgal biomass creation, particularly, low biomass yield, and energy-consuming harvesting, dewatering, drying and extraction strategies. those offer a heritage to the state of the art applied sciences for algal cultivation, CO2 sequestration, and large-scale software of those systems.
In order to faucet the economic strength of algae, a biorefinery suggestion has been proposed which may support to extract greatest advantages from algal biomass. This refinery notion promotes the harvesting of a number of items from the feedstock as a way to make the method economically beautiful. For the previous few many years, algal biomass has been explored to be used in quite a few items reminiscent of gasoline, agricultural vegetation, pigments and prescription drugs, in addition to in bioremediation. to fulfill the massive call for, there was a spotlight on large-scale construction of algal biomass in closed or open photobioreactors. assorted dietary stipulations for algal progress were explored, equivalent to photoautotrophic, heterotrophic, mixotrophic and oleaginous.
This publication is aimed toward a large viewers, together with undergraduates, postgraduates, lecturers, power researchers, scientists in undefined, strength experts, coverage makers and others who desire to comprehend algal biorefineries and in addition retain abreast of the newest developments.
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Extra info for Algal Biorefinery: An Integrated Approach
Das, D. (1985). Thesis on “Optimization of methane production from agricultural residues”. IIT Delhi, India. Das, D. (2009). Advances in biological hydrogen production processes: An approach towards commercialization.
Biogas, syngas and bio-hydrogen) which can be used in engines and turbines and as feedstock for refineries. However, several drawbacks of microalgal biomass production should be solved, such as more efficient production, harvesting, dewatering, drying and extraction (if applicable). Thus, fuel-only algal systems are not plausible, at least not in the foreseeable future, and additional revenues are required. Microalgal production should be assisted by alternative energies, for mixing the culture, illumination, dewatering and processing, and drying.
It has been estimated that approximately 46,760 to 140,290 L of ethanol ha−1 yr−1 can be produced from microalgae (Cheryl, 2010). This yield is several orders of magnitude higher than yields obtained for other feedstocks. Matsumoto et al. (2003) have screened several strains of marine microalgae with high carbohydrate content, and identified a total of 76 strains with a carbohydrate content ranging from 40 to 53 %. Hirano et al. (1997) conducted an experiment with C. vulgaris microalga (37 % w/w starch content) through fermentation and yielded a 65 % ethanol-conversion when compared with the theoretical conversion rate from starch.
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