Membrane bioreactor-assisted volatile fatty acids production and in situ recovery from cow manureShow others and affiliations
2021 (English)In: Bioresource Technology, ISSN 0960-8524, E-ISSN 1873-2976, Bioresource Technology, Vol. 321, article id 124456Article in journal (Refereed) Published
Sustainable development
According to the author(s), the content of this publication falls within the area of sustainable development.
Abstract [en]
Cow manure (CM) generation in large volumes has for long been considered a waste management challenge. However, the organic content of CM signals opportunities for the production of value-added bioproducts such as volatile fatty acids (VFAs) through anaerobic digestion (AD). However, a robust VFAs fermentation process requires effective methane formation inhibition and enhance VFAs recovery. In this study, thermal pretreatment was applied to inhibit methanogens for enhanced VFAs production and an immersed membrane bioreactor (iMBR) for in situ recovery of VFAs in a semi-continuous AD. Maximal VFAs yield of 0.41 g VFAs/g volatile solids (VS) was obtained from thermally-treated CM without inoculum addition. The CM was further fed to the iMBR operating at organic loading rates of 0.8–4.7 gVS/L.d. The VFAs concentration increased to 6.93 g/L by rising substrate loading to 4.7 g VS/L.d. The applied iMBR set-up was successfully used for stable long-term (114 days) VFAs production and recovery.
Place, publisher, year, edition, pages
Elsevier, 2021. Vol. 321, article id 124456
Keywords [en]
Anaerobic digestion, Cow manure, Membrane bioreactor, Volatile fatty acids, Bioproducts, Bioreactors, Fertilizers, Manures, Recovery, Substrates, Fermentation process, Immersed membrane bioreactors, Management challenges, Organic loading rates, Substrate loading, Thermal pre-treatment, Volatile fatty acids (VFAs), acetic acid, butyric acid, calcium ion, carbon dioxide, copper, formic acid, hydrogen, iron, magnesium, manganese, methane, phosphoric acid, potassium, propionic acid, sodium ion, volatile fatty acid, zinc ion, bioreactor, concentration (composition), fermentation, inhibition, inoculation, membrane, methanogenic bacterium, anaerobic sludge, Article, batch fermentation, chemical oxygen demand, cow, female, food waste, gas chromatography, limit of detection, manure, methanogen, microbial diversity, municipal wastewater, nonhuman, pH, priority journal, sludge, suspended particulate matter, thermal conductivity, waste water management, anaerobic growth, animal, bovine, Anaerobiosis, Animals, Cattle, Fatty Acids, Volatile
National Category
Industrial Biotechnology
Research subject
Resource Recovery; Resource Recovery; Resource Recovery
Identifiers
URN: urn:nbn:se:hb:diva-25818DOI: 10.1016/j.biortech.2020.124456ISI: 000604219100006PubMedID: 33276207Scopus ID: 2-s2.0-85097198010OAI: oai:DiVA.org:hb-25818DiVA, id: diva2:1578302
Funder
Swedish Research Council, 2018-044792021-07-062021-07-062021-07-07Bibliographically approved