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Quick-start of full-scale anaerobic digestion (AD) using aeration
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.ORCID iD: 0000-0001-7158-4662
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.
2015 (English)In: Waste Management, ISSN 0956-053X, E-ISSN 1879-2456, Vol. 38, p. 102-104Article in journal (Refereed) Published
Abstract [en]

A conventional 1300 m3 continuously stirred anaerobic tank reactor at the city of Boden, north Sweden, which was receiving a feed of both sewage sludge and food waste, was put out of operation due to the build-up of a float phase. The reactor was emptied and cleaned. At start-up there was no methanogenic sludge available, so an unconventional start-up procedure was applied: The reactor was rapidly (8 days with 1200 kg of total solids (TS) added daily) filled with thickened, and slightly acidic sewage sludge, showing only slight methane generation, which was subsequently heated to 55 °C. Then compressed air was blown into the digester and within a month a fully functional methanogenic culture was established. The transfer from acidogenic to methanogenic conditions happened in about one week. As a start-up technique this is fast and cost efficient, it only requires the access of a compressor, electricity and a source of air. In total, about 16 tonnes of oxygen were used. It is proposed that this method may also be used as an operational amendment technique, should a reactor tend to acidify.

Place, publisher, year, edition, pages
2015. Vol. 38, p. 102-104
National Category
Other Environmental Engineering
Research subject
Waste Science and Technology
Identifiers
URN: urn:nbn:se:ltu:diva-5077DOI: 10.1016/j.wasman.2014.12.016ISI: 000353176600013PubMedID: 25636861Scopus ID: 2-s2.0-84933671527Local ID: 3178f0e2-0ebd-4838-b040-1b17e9eceddaOAI: oai:DiVA.org:ltu-5077DiVA, id: diva2:977951
Note
Validerad; 2015; Nivå 2; 20150129 (andbra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Lagerkvist, AndersPelkonen, MarkkuWikström, Tommy

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