Algal Biorefinery: An Integrated Approach by Debabrata Das PDF

By Debabrata Das

ISBN-10: 3319228129

ISBN-13: 9783319228129

ISBN-10: 3319228137

ISBN-13: 9783319228136

This ebook severely discusses varied elements of algal construction structures and several other of the drawbacks regarding microalgal biomass construction, specifically, low biomass yield, and energy-consuming harvesting, dewatering, drying and extraction techniques. those offer a historical past to the cutting-edge applied sciences for algal cultivation, CO2 sequestration, and large-scale software of those systems.

In order to faucet the economic power of algae, a biorefinery thought has been proposed which can aid to extract greatest advantages from algal biomass. This refinery suggestion promotes the harvesting of a number of items from the feedstock as a way to make the method economically appealing. For the previous few a long time, algal biomass has been explored to be used in a variety of items comparable to gas, agricultural vegetation, pigments and prescription drugs, in addition to in bioremediation. to fulfill the massive call for, there was a spotlight on large-scale creation of algal biomass in closed or open photobioreactors. assorted dietary stipulations for algal development were explored, resembling photoautotrophic, heterotrophic, mixotrophic and oleaginous.

This publication is geared 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 likewise retain abreast of the newest developments.

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Extra info for Algal Biorefinery: An Integrated Approach

Sample text

In fact, cyanobacteria (mainly its mutants) are considered the highest biological producer at low cost, since they require only air (N2 or CO2), water and mineral salts, using light as the only energy source. H2 production by cyanobacteria requires two enzymes: the nitrogenase(s) and the bi-directional hydrogenase. In N2-­ fixing strains, the net H2 production is the result of H2 evolution by nitrogenase and H2 consumption mainly catalysed by an uptake hydrogenase. Consequently, the production of mutants deficient in H2 uptake activity is necessary.

These divisions of food chain, producing organic material from sunlight, carbon dioxide and water (Wiencke and Bischof, 2012). Macroalgae act as ecological engineers mainly on rocky coasts of the oceans. The muddy and sandy areas have fewer macroalgae, because most of the species cannot anchor there. The production of macrophytes (macroalgae and seagrasses (vascular water plant)) amounts to 5–10 % of the total oceanic production, even though they only cover a minute area of the world’s oceans (Lobban and Harrison, 1997; Wiencke and Bischof, 2012).

Open ponds are a very efficient and cost-effective method of cultivating algae, but they could become contaminated with unwanted species very quickly. PBR are excellent for maintaining axenic cultures, but set up costs are generally ten times higher than for open ponds. A combination of both systems is probably the most logical choice for cost-effective cultivation of high yielding strains for biofuels. Inoculation has always been a part of algal aquaculture. Open ponds are inoculated with a desired strain that was invariably cultivated in a bioreactor, whether it was as simple as a 1 Introduction 23 plastic bag or a high-tech fibre optic bioreactor.

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Algal Biorefinery: An Integrated Approach by Debabrata Das

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