New PDF release: Algal Biorefineries: Volume 1: Cultivation of Cells and

By Rakesh Bajpai, Aleš Prokop, Mark Zappi

ISBN-10: 9400774931

ISBN-13: 9789400774933

ISBN-10: 940077494X

ISBN-13: 9789400774940

Over the earlier century, the vast majority of chemical and effort wishes of our commercial society has originated from fossilized carbon assets (coal, crude oil, common gas). more and more, there's a recognition that usage of the fossilized carbon assets has antagonistic environmental effects within the kind of expanding focus of greenhouse gases. we're additionally turning into conscious of the restricted nature of those assets. for this reason, substantial efforts are being made to supply chemical compounds and fuels from renewable assets reminiscent of wooded area items, agricultural residues and plant items. All of those structures catch solar power and atmospheric carbon dioxide as part of the typical carbon cycle. severe learn efforts also are underway, concentrating on cultivation of photosynthetic autotrophic microbes for the creation of biomass and lipids. during this classification, algae seems to supply the main capability for taking pictures solar power and atmospheric carbon dioxide and offering adequate amounts of biomass/lipids that may offset the fossilized carbon usage in a significant demeanour with no impacting foodstuff output adversely. despite the fact that, numerous advances, either technologically in addition to politically, are wanted sooner than we will observe its complete capability. it's also transparent biorefinery strategy has to be undertaken so one can harvest renewable power and chemical compounds from algae economically. This edited, multi-authored quantity on Algal Biorefineries will rfile new advances regarding algae-based technology.

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Additional resources for Algal Biorefineries: Volume 1: Cultivation of Cells and Products

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Since low photon fluxes per cell maximize ФDW, the photosynthetic units mechanistic model was adapted to determine a corresponding maximum residence time under high light. Such high speeds in the photic zone, which call for fundamental changes in bioreactor design, enable the use of ФDW to describe biomass productivity under otherwise inhibitory irradiances. Nitrogen limitationinduced lipid accumulation corresponds to a photon flux excess with respect to the rate of nitrogen uptake, such that continuous lipid production can be achieved using the ФDW and nitrogen quotient parameters.

5 but not below (Mecherikunnel et al. 1983). These tabulated values provide an updated tool which should help prevent the use of erroneous conversion factors (Kania and Giacomelli 2001). A. D. Holland and J. M. Dragavon 34 Table 2 Einstein-to-Joules conversion factors cEJ and Percent energy in the PAR region. An outer space spectrum (Space), an ASTM 37˚ tilted ground spectrum (Tilted) and an ASTM ground direct-normal spectrum (Flat) were used cEJ in µE J−1 % Energy in the PAR region Ref. spectrum range Ref.

1):  PSUN ( ) = · EP ( ) 700 ∫ 400 · EP ( ) d (3) Algal Reactor Design Based on Comprehensive Modeling of Light and Mixing 33 Fig.  3) The fraction of energy in the PAR region, given a total energy measured in the wavelength range λ1–λ2, is: 700  FPAR = ∫E P (λ)d λ P (λ)d λ (4) 400 λ2 ∫E λ1 Percent energy in the PAR region as well as Einstein-to-Joules conversion factors are reported in Table 2. Outer space (Space) spectrum data was kindly provided by Dr. Thuillier (Thuillier et al. 2003). For ground irradiance, ASTM spectra (ASTM 2003) were used as reference ground spectra, for a 37˚ tilted surface (Tilted) and a direct-normal surface (Flat).

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Algal Biorefineries: Volume 1: Cultivation of Cells and Products by Rakesh Bajpai, Aleš Prokop, Mark Zappi


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