Journal article
Urban biowaste valorization by coupling anaerobic digestion and single cell protein production
Technical University of Denmark1
Residual Resource Engineering, Department of Environmental Engineering, Technical University of Denmark2
Department of Environmental Engineering, Technical University of Denmark3
Water Technologies, Department of Environmental Engineering, Technical University of Denmark4
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.
| Language: | English |
|---|---|
| Year: | 2019 |
| Pages: | 121743 |
| ISSN: | 09608524 and 18732976 |
| Types: | Journal article |
| DOI: | 10.1016/j.biortech.2019.121743 |
| ORCIDs: | 0000-0003-0236-5970 , Tsapekos, Panagiotis , Zhang, Yifeng , Valverde Pérez, Borja and Angelidaki, Irini |
Bio-waste valorization Municipal solid waste Nitrogen recovery Protein scarcity SDG 11 - Sustainable Cities and Communities SDG 12 - Responsible Consumption and Production Single cell protein
Anaerobiosis Biofuels Bioreactors Dietary Proteins Methane Nitrogen single cell proteins
