TY - JOUR
T1 - Characterization of a microalga Chlorella sp. well adapted to highly concentrated municipal wastewater for nutrient removal and biodiesel production
AU - Li, Yecong
AU - Chen, Yi Feng
AU - Chen, Paul
AU - Min, Min
AU - Zhou, Wenguang
AU - Martinez, Blanca
AU - Zhu, Jun
AU - Ruan, Rog
N1 - Funding Information:
The authors gratefully acknowledge Metropolitan Council Environmental Services for providing centrate samples and University of Minnesota Initiative for Renewable Energy (IREE) for funding support.
PY - 2011/4
Y1 - 2011/4
N2 - The feasibility of growing Chlorella sp. in the centrate, a highly concentrated municipal wastewater stream generated from activated sludge thickening process, for simultaneous wastewater treatment and energy production was tested. The characteristics of algal growth, biodiesel production, wastewater nutrient removal and the viability of scale-up and the stability of continuous operation were examined. Two culture media, namely autoclaved centrate (AC) and raw centrate (RC) were used for comparison. The results showed that by the end of a 14-day batch culture, algae could remove ammonia, total nitrogen, total phosphorus, and chemical oxygen demand (COD) by 93.9%, 89.1%, 80.9%, and 90.8%, respectively from raw centrate, and the fatty acid methyl ester (FAME) content was 11.04% of dry biomass providing a biodiesel yield of 0.12. g-biodiesel/L-algae culture solution. The system could be successfully scaled up, and continuously operated at 50% daily harvesting rate, providing a net biomass productivity of 0.92. g-algae/(L day).
AB - The feasibility of growing Chlorella sp. in the centrate, a highly concentrated municipal wastewater stream generated from activated sludge thickening process, for simultaneous wastewater treatment and energy production was tested. The characteristics of algal growth, biodiesel production, wastewater nutrient removal and the viability of scale-up and the stability of continuous operation were examined. Two culture media, namely autoclaved centrate (AC) and raw centrate (RC) were used for comparison. The results showed that by the end of a 14-day batch culture, algae could remove ammonia, total nitrogen, total phosphorus, and chemical oxygen demand (COD) by 93.9%, 89.1%, 80.9%, and 90.8%, respectively from raw centrate, and the fatty acid methyl ester (FAME) content was 11.04% of dry biomass providing a biodiesel yield of 0.12. g-biodiesel/L-algae culture solution. The system could be successfully scaled up, and continuously operated at 50% daily harvesting rate, providing a net biomass productivity of 0.92. g-algae/(L day).
KW - Biodiesel production
KW - Microalgae Chlorella
KW - Municipal wastewater
KW - Nutrient removal
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U2 - 10.1016/j.biortech.2011.01.091
DO - 10.1016/j.biortech.2011.01.091
M3 - Article
C2 - 21353532
AN - SCOPUS:79952535635
SN - 0960-8524
VL - 102
SP - 5138
EP - 5144
JO - Agricultural Wastes
JF - Agricultural Wastes
IS - 8
ER -
