Sorry, you need to enable JavaScript to visit this website.

Effect of the organic loading rate on biogas composition in continuous fermentative hydrogen production

TitleEffect of the organic loading rate on biogas composition in continuous fermentative hydrogen production
Publication TypeArticolo su Rivista peer-reviewed
Year of Publication2010
AuthorsSpagni, A., Casu S., and Farina R.
JournalJournal of Environmental Science and Health - Part A Toxic/Hazardous Substances and Environmental Engineering
Volume45
Pagination1475-1481
ISSN10934529
Keywordsacclimatization, Acidic pH, Anaerobic, article, Bacteria, Bio-hydrogen production, biofuels, Biogas, Biogas composition, Biological hydrogen production, Bioreactors, Chemical, Chemical composition, chemical reaction kinetics, Clean energy, Continuous operation, darkness, Fermentation, Fermentative hydrogen production, Fermentative process, Gas producers, Hydrogen, Hydrogen production, Hydrogenotrophic methanogens, methane, methanogen, Methanogenic activity, methanogenic fermentation, Methanogens, nonhuman, Operating condition, Organic Chemicals, organic loading rate, Organic loading rates, pH, Renewable energies, renewable energy, Renewable energy resources, sewage, sludge, sludge blanket reactor, Sludge retention, UASB reactor, Up-flow anaerobic sludge blanket reactors, upflow reactor, Water Pollutants
Abstract

Some systems did not select for hydrogen-producing microorganisms and an unexpected growth of hydrogenotrophic methanogens was observed, although the reactors were operated under well-defined operating conditions that could result in biohydrogen production. The aim of this study was to evaluate the effect of the organic loading rate (OLR) on the hydrogen and methane composition of the biogas produced in dark fermentative processes. The study was carried out using an upflow anaerobic sludge blanket (UASB) reactor in order to evaluate the OLR effect in systems with sludge retention. During continuous operation, the UASB reactor showed the slow development of methanogenic activity, related to the applied OLR. The results demonstrate that operating an UASB reactor at pH 5.5 is not enough to prevent the acclimation of methanogens to the acidic pH and therefore long-term biohydrogen production cannot be achieved. Moreover, this study demonstrates that OLR also has an effect on the biogas composition, where the higher the OLR the greater the biogas H2 content. Copyright © Taylor & Francis Group, LLC.

Notes

cited By 17

URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-77955574006&doi=10.1080%2f10934529.2010.506091&partnerID=40&md5=8a5c4867e1d15cc412220c50c855af41
DOI10.1080/10934529.2010.506091
Citation KeySpagni20101475