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Growth characteristics of Chlorella sorokiniana in airlift and bubble column photobioreactors



Growth characteristics of Chlorella sorokiniana in airlift and bubble column photobioreactors



Bioresource Technology 116: 307-313



The present study investigated the feasibility of bioCO(2) sequestration using Chlorella sorokiniana. It was found that 5% CO(2) (v/v) in air was the most suitable concentration for the growth of this organism. At this concentration, the maximum rate of CO(2) sequestered and the biomass obtained were found to be 1.21 g L(-1)d(-1) and 4.4 g L(-1) respectively. Modeling and simulation of the growth profile was obtained using the logistic equation. Further, at higher CO(2) concentrations, pH drop in the growth media, TAP [-acetate], was prevented by replacing NH(4)Cl by NaNO(3.) Additionally, the study evaluated the performance of two reactors namely: bubble column and airlift reactor based on their growth profile and transport properties like K(L)a and mixing time. The growth profile was better in airlift reactor and it provides cyclic axial mixing of media. K(L)a of downcomer was significantly lower than the riser in airlift reactor.

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Accession: 053449193

Download citation: RISBibTeXText

PMID: 22525259

DOI: 10.1016/j.biortech.2012.03.074


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