TY - JOUR
T1 - Urban biowaste valorization by coupling anaerobic digestion and single cell protein production
AU - Khoshnevisan, Benyamin
AU - Tsapekos, Panagiotis
AU - Zhang, Yifeng
AU - Valverde-Pérez, Borja
AU - Angelidaki, Irini
N1 - Publisher Copyright:
© 2019
PY - 2019/10
Y1 - 2019/10
N2 - Resource efficient and novel practices to produce proteinaceous food and feed sources can partially alleviate the protein scarcity problem. The conversion of low-value waste streams into single cell protein (SCP) seems a potent solution. This study evaluated the possibility of urban biowaste valorization through coupling anaerobic digestion and SCP production, and feeding a methanotroph mixed-culture with raw and upgraded biogas. In respect to nitrogen supply, the mixed-culture could grow well providing nutrients by direct addition of pasteurized centrifuged-filtered digestate or by adding electrochemically extracted ammonium from the digestate. The SCP yield on methane varied from 0.59 to 0.76 g cell dry weight (CDW)/g CH4. A high yield on methane (0.87 g CDW/g CH4) proved that biogas is a good substitute for natural gas for scaled-up microbial protein production. In addition, the produced SCP was rich in essential amino acids, marking the produced biomass comparable with other protein sources.
AB - Resource efficient and novel practices to produce proteinaceous food and feed sources can partially alleviate the protein scarcity problem. The conversion of low-value waste streams into single cell protein (SCP) seems a potent solution. This study evaluated the possibility of urban biowaste valorization through coupling anaerobic digestion and SCP production, and feeding a methanotroph mixed-culture with raw and upgraded biogas. In respect to nitrogen supply, the mixed-culture could grow well providing nutrients by direct addition of pasteurized centrifuged-filtered digestate or by adding electrochemically extracted ammonium from the digestate. The SCP yield on methane varied from 0.59 to 0.76 g cell dry weight (CDW)/g CH4. A high yield on methane (0.87 g CDW/g CH4) proved that biogas is a good substitute for natural gas for scaled-up microbial protein production. In addition, the produced SCP was rich in essential amino acids, marking the produced biomass comparable with other protein sources.
KW - Bio-waste valorization
KW - Municipal solid waste
KW - Nitrogen recovery
KW - Protein scarcity
KW - Single cell protein
U2 - 10.1016/j.biortech.2019.121743
DO - 10.1016/j.biortech.2019.121743
M3 - Journal article
C2 - 31323514
AN - SCOPUS:85068900161
SN - 0960-8524
VL - 290
JO - Bioresource Technology
JF - Bioresource Technology
M1 - 121743
ER -