TY - JOUR
T1 - Generation of biofuel from anaerobic digestion of Scenedesmus obliquus grown in energetic-laden industrial wastewater
T2 - Understanding microalgae strains, co-digestants, and digestate toxicity
AU - Mai, Andrew
AU - Terracciano, Amalia
AU - Abraham, Juliana
AU - RoyChowdhury, Abhishek
AU - Koutsospyros, Agamemnon
AU - Su, Tsan Liang
AU - Braida, Washington
AU - Christodoulatos, Christos
AU - Smolinski, Benjamin
N1 - Publisher Copyright:
© 2022 American Institute of Chemical Engineers.
PY - 2022/3/1
Y1 - 2022/3/1
N2 - Microalgae as a substrate for anaerobic digestion (AD) offer promising outcomes over other conventional feedstocks. In this work, the generation of biofuel in the form of biogas via AD using wastewater-grown microalgae was investigated. In particular, batch screening of different microalga strains and co-substrates, culminated into the evaluation of biomethane potential (BMP) from AD of Scenedesmus obliquus grown in energetic-laden wastewater through benchtop-scale semi-continuous reactor. Effectiveness of AD was evaluated for biogas yield, volatile solids (VS) removal, and kinetics for various microalga strains as potential substrate candidates. High carbon content co-digestants were also investigated including return activated sludge and waste office pulped paper. At semi-continuous scale, the specific BMPs associated with of 15, 20, and 30 days hydraulic residence times (HRT) were determined as 67.0, 86.6, and 86.3 ml CH4/g VS (added) with average methane content of 70%. In addition, toxicological assessments showed that AD effluent was benign towards renew growth of biomass, thus showing the potential for nutrients recover.
AB - Microalgae as a substrate for anaerobic digestion (AD) offer promising outcomes over other conventional feedstocks. In this work, the generation of biofuel in the form of biogas via AD using wastewater-grown microalgae was investigated. In particular, batch screening of different microalga strains and co-substrates, culminated into the evaluation of biomethane potential (BMP) from AD of Scenedesmus obliquus grown in energetic-laden wastewater through benchtop-scale semi-continuous reactor. Effectiveness of AD was evaluated for biogas yield, volatile solids (VS) removal, and kinetics for various microalga strains as potential substrate candidates. High carbon content co-digestants were also investigated including return activated sludge and waste office pulped paper. At semi-continuous scale, the specific BMPs associated with of 15, 20, and 30 days hydraulic residence times (HRT) were determined as 67.0, 86.6, and 86.3 ml CH4/g VS (added) with average methane content of 70%. In addition, toxicological assessments showed that AD effluent was benign towards renew growth of biomass, thus showing the potential for nutrients recover.
KW - S. obliquus
KW - anaerobic digestion
KW - biogas
KW - biomethane potential
KW - energetics
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U2 - 10.1002/ep.13801
DO - 10.1002/ep.13801
M3 - Article
AN - SCOPUS:85123840720
SN - 1944-7442
VL - 41
JO - Environmental Progress and Sustainable Energy
JF - Environmental Progress and Sustainable Energy
IS - 2
M1 - e13801
ER -