TY - JOUR
T1 - Capability of microalgae for local saline sewage treatment towards biodiesel production
AU - Wu, K. C.
AU - Yau, Y. H.
AU - Ho, K. C.
N1 - Funding Information:
The author would like to thank his supervisor, Prof. Kin-chung Ho for his guidance, support, and encouragement during his research project for Doctor of philosophy in Energy and Environment at the Open University of Hong Kong. The author would also like to thank Dr Y H Yau for his support and assistance with this project.
Publisher Copyright:
© Published under licence by IOP Publishing Ltd.
PY - 2017/8/31
Y1 - 2017/8/31
N2 - Seawater flushing was introduced in Hong Kong since 1950's. High salinity has an inhibitory effect on nitrification and biological phosphorus uptake of microorganisms. Therefore, saline sewage has impact on traditional biological wastewater treatment. Saline conditions of domestic wastewater then pose opportunity to use algal technology in wastewater treatment. During the treatment (phycoremediation), biodiesel can be produced. This study aims to give an in-depth investigation and development on application of local microalgal strains on biodiesel production. Dunaliella tertiolecta was selected the appropriate algal species with high potential for phycoremediation then biodiesel production. D.tertiolecta was further investigated by optimizing its growth in different process condition in preliminary effluent as based medium. The optimized process condition were acclimated culture with medium initial cell number (5.0 ×105 cells mL-1), under 5% CO2 aerations in preliminary effluent adjust to 15 psu (denoting practical salinity unit). Results showed that lipid content increased from 30.2% to 42%, and biomass productivity reached 463.3 mg L-1day-1 by Fatty acid Methyl Ester (FAME) profile was found for biodiesel production in optimized stage. The treatment period of preliminary effluent was shortened from 15d in original design (unacclimated culture, low initial cell number (5.0 ×105 cells mL-1), without CO2 aeration) to 4d.
AB - Seawater flushing was introduced in Hong Kong since 1950's. High salinity has an inhibitory effect on nitrification and biological phosphorus uptake of microorganisms. Therefore, saline sewage has impact on traditional biological wastewater treatment. Saline conditions of domestic wastewater then pose opportunity to use algal technology in wastewater treatment. During the treatment (phycoremediation), biodiesel can be produced. This study aims to give an in-depth investigation and development on application of local microalgal strains on biodiesel production. Dunaliella tertiolecta was selected the appropriate algal species with high potential for phycoremediation then biodiesel production. D.tertiolecta was further investigated by optimizing its growth in different process condition in preliminary effluent as based medium. The optimized process condition were acclimated culture with medium initial cell number (5.0 ×105 cells mL-1), under 5% CO2 aerations in preliminary effluent adjust to 15 psu (denoting practical salinity unit). Results showed that lipid content increased from 30.2% to 42%, and biomass productivity reached 463.3 mg L-1day-1 by Fatty acid Methyl Ester (FAME) profile was found for biodiesel production in optimized stage. The treatment period of preliminary effluent was shortened from 15d in original design (unacclimated culture, low initial cell number (5.0 ×105 cells mL-1), without CO2 aeration) to 4d.
UR - http://www.scopus.com/inward/record.url?scp=85029526009&partnerID=8YFLogxK
U2 - 10.1088/1755-1315/82/1/012008
DO - 10.1088/1755-1315/82/1/012008
M3 - Conference article
AN - SCOPUS:85029526009
SN - 1755-1307
VL - 82
JO - IOP Conference Series: Earth and Environmental Science
JF - IOP Conference Series: Earth and Environmental Science
IS - 1
M1 - 012008
T2 - 3rd International Conference on Water Resource and Environment, WRE 2017
Y2 - 26 June 2017 through 29 June 2017
ER -