Batchwise mesophilic anaerobic co-digestion of secondary sludge from pulp and paper industry and municipal sewage sludge
2013 (English)In: Waste Management, ISSN 0956-053X, E-ISSN 1879-2456, Vol. 33, no 4, 820-824 p.Article in journal (Refereed) Published
Residues from forest-industry wastewater-treatment systems are treated as waste at many pulp and paper mills. These organic substances have previously been shown to have potential for production of large quantities of biogas. There is concern, however, that the process would require expensive equipment because of the slow degradation of these substances. Pure non-fibrous sludge from forest industry showed lower specific methane production during mesophilic digestion for 19 days, 53 ± 26 Nml/g of volatile solids as compared to municipal sewage sludge, 84 ± 24 Nml/g of volatile solids. This paper explores the possibility of using anaerobic co-digestion with municipal sewage sludge to enhance the potential of methane production from secondary sludge from a pulp and paper mill. It was seen in a batch anaerobicdigestion operation of 19 days that the specific methane production remained largely the same for municipal sewage sludge when up to 50% of the volatile solids were replaced with forest-industry secondary sludge. It was also shown that the solid residue from anaerobic digestion of the forest-industry sludge should be of suitable quality to use for improving soil quality on lands that are not used for food production.
Place, publisher, year, edition, pages
Elsevier, 2013. Vol. 33, no 4, 820-824 p.
Research subject Environmental and Energy Systems
IdentifiersURN: urn:nbn:se:kau:diva-26116ISI: 000317798000006PubMedID: 23294534OAI: oai:DiVA.org:kau-26116DiVA: diva2:602359
Artikel är publicerad som manuskript i Alina Hagelqvists avhandling och heter där Stoica, A. / Batchwise mesophilic anaerobic co-digestion of secondary sludge from pulp industry and municipal sewage sludge / 2013 /2013-02-282013-02-012016-06-30Bibliographically approved