Microalgae-mediated simultaneous treatment of toxic thiocyanate and production of biodiesel

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In this work, a method for simultaneously degrading the toxic pollutant, thiocyanate, and producing microalgal lipids using mixed microbial communities was developed. Aerobic activated sludge was used as the seed culture and thiocyanate was used as the sole nitrogen source. Two cultivation methods were sequentially employed: a lithoautotrophic mode and a photoautotrophic mode. Thiocyanate hydrolysis and a nitrification was found to occur under the first (lithoautotrophic) condition, while the oxidized forms of nitrogen were assimilated by the photoautotrophic consortium and lipids were produced under the second condition. The final culture exhibited good settling efficiency (similar to 70% settling over 10 min), which can benefit downstream processing. The highest CO2 fixation rate and lipid productivity were observed with 2.5% and 5% CO2, respectively. The proposed integrated algal-bacterial system appears to be a feasible and even beneficial option for thiocyanate treatment and production of microbial lipids.
Publisher
ELSEVIER SCI LTD
Issue Date
2014-04
Language
English
Article Type
Article
Keywords

FATTY-ACID-COMPOSITION; WASTE-WATER; DENSITY CULTIVATION; BREWERY INDUSTRY; RAINBOW-TROUT; ORGANIC WASTE; CETANE NUMBER; TEMPERATURE; INHIBITION; METABOLISM

Citation

BIORESOURCE TECHNOLOGY, v.158, pp.166 - 173

ISSN
0960-8524
DOI
10.1016/j.biortech.2014.01.128
URI
http://hdl.handle.net/10203/189311
Appears in Collection
CE-Journal Papers(저널논문)CBE-Journal Papers(저널논문)
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