TY - JOUR
T1 - Bioethanol production from Chlorella vulgaris ESP-31 grown in unsterilized swine wastewater
AU - Acebu, Paula Isabel G.
AU - de Luna, Mark Daniel G.
AU - Chen, Chun Yen
AU - Abarca, Ralf Ruffel M.
AU - Chen, Jih Heng
AU - Chang, Jo Shu
N1 - Funding Information:
The authors are grateful to the financial support from the Ministry of Science and Technology, Taiwan, R.O.C. under the grant numbers MOST 110-3116-F-006-003, MOST 110-2221-E-029-004-MY3, and MOST 110-2621-M-029-001. The authors also acknowledge the funding provided by the Department of Science and Technology (DOST) and the Chinese Taipei's Ministry of Science and Technology (MOST) through their joint research project, the Manila Economic and Cultural Office-Taipei Economic and Cultural Office (MECO-TECO) Sandwich Scholarship Program.
Funding Information:
The authors are grateful to the financial support from the Ministry of Science and Technology, Taiwan , R.O.C., under the grant numbers MOST 110-3116-F-006-003 , MOST 110-2221-E-029-004-MY3 , and MOST 110-2621-M-029-001 . The authors also acknowledge the funding provided by the Department of Science and Technology (DOST) and the Chinese Taipei’s Ministry of Science and Technology (MOST) through their joint research project, the Manila Economic and Cultural Office-Taipei Economic and Cultural Office (MECO-TECO) Sandwich Scholarship Program.
Publisher Copyright:
© 2022 Elsevier Ltd
PY - 2022/5
Y1 - 2022/5
N2 - The potential of microalgae to remove nutrients from swine wastewater and accumulate carbohydrates was examined. Chlorella sorokiniana AK-1 and Chlorella vulgaris ESP-31 were grown in 10% unsterilized swine wastewater and obtained a maximum carbohydrate content and productivity of 42.5% and 189 mg L−1d−1, respectively. At 25% wastewater and 25% BG-11 concentration, the maximum carbohydrate productivity and total nitrogen removal efficiency of C. vulgaris ESP-31 were improved to 266 mg L−1d−1 and 54.2%, respectively. Further modifications in light intensity, inoculum size, and harvesting period enhanced the biomass growth, carbohydrate concentration, and total nitrogen assimilation to 3.6 gL−1, 1.8 gL−1, and 92.2%, respectively. Ethanol fermentation of the biomass resulted in bioethanol yield and concentration of 84.2% and 4.2 gL−1, respectively. Overall, unsterilized swine wastewater was demonstrated as a cost-effective nutrient source for microalgal cultivation which further increases the economic feasibility and environmental compatibility of bioethanol production with concomitant swine wastewater treatment.
AB - The potential of microalgae to remove nutrients from swine wastewater and accumulate carbohydrates was examined. Chlorella sorokiniana AK-1 and Chlorella vulgaris ESP-31 were grown in 10% unsterilized swine wastewater and obtained a maximum carbohydrate content and productivity of 42.5% and 189 mg L−1d−1, respectively. At 25% wastewater and 25% BG-11 concentration, the maximum carbohydrate productivity and total nitrogen removal efficiency of C. vulgaris ESP-31 were improved to 266 mg L−1d−1 and 54.2%, respectively. Further modifications in light intensity, inoculum size, and harvesting period enhanced the biomass growth, carbohydrate concentration, and total nitrogen assimilation to 3.6 gL−1, 1.8 gL−1, and 92.2%, respectively. Ethanol fermentation of the biomass resulted in bioethanol yield and concentration of 84.2% and 4.2 gL−1, respectively. Overall, unsterilized swine wastewater was demonstrated as a cost-effective nutrient source for microalgal cultivation which further increases the economic feasibility and environmental compatibility of bioethanol production with concomitant swine wastewater treatment.
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U2 - 10.1016/j.biortech.2022.127086
DO - 10.1016/j.biortech.2022.127086
M3 - Article
C2 - 35364235
AN - SCOPUS:85127781067
SN - 0960-8524
VL - 352
JO - Bioresource technology
JF - Bioresource technology
M1 - 127086
ER -