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CO-DIGESTION OF CULTIVATED MICROALGAE AND SEWAGE SLUDGE FROM MUNICIPAL WASTE WATER TREATMENT
Mälardalen University, School of Business, Society and Engineering, Future Energy Center. (ACWA/FUTURE ENERGY)ORCID iD: 0000-0002-0861-6438
Mälardalen University, School of Business, Society and Engineering, Future Energy Center. (ACWA/FUTURE ENERGY)
Mälardalen University, School of Sustainable Development of Society and Technology. Mälardalen University, School of Business, Society and Engineering, Future Energy Center. (ACWA/FUTURE ENERGY)ORCID iD: 0000-0003-3311-9465
Mälardalen University, School of Business, Society and Engineering, Future Energy Center. (ACWA/FUTURE ENERGY)ORCID iD: 0000-0002-3485-5440
2013 (English)Conference paper, (Refereed)
Abstract [en]

The demand for biogas is continuously growing and the biogas substrate, such as food waste, may soon become limited and it is therefore important for biogas producers to expand the range of substrates. One way can be to use microalgae in co-digestion with sewage sludge.

The present study explores the possibilities to use harvested microalgae from Lake Mälaren, as a co-substrate to sewage sludge in biogas production under mesophilic and thermophilic conditions. The aim is to investigate if co- digestion of microalgae and sewage sludge is more efficient for biogas production compared using the sludge alone. The study has been carried out as a BMP-experiment (Biochemical Methane Potential) in batch fermentation bottles. The substrate was undigested sludge where 0%, 12 %, 25 % and 37 % were replaced with the cultivated microalgae. The results showed that the use of an algae/bacteria community, cultivated in prior to digestion, can serve as a biomass substrate for biogas production together with municipal wastewater sludge. Co-digestion of microalgae and sewage sludge can be more efficient for biogas production compared to using the sludge alone under mesophilic conditions. It can also be concluded that thermophilic co-digestion between the microalgae and sludge give lower biochemical methane potential. 

Place, publisher, year, edition, pages
2013.
National Category
Engineering and Technology
Research subject
Energy- and Environmental Engineering
Identifiers
URN: urn:nbn:se:mdh:diva-18296OAI: oai:DiVA.org:mdh-18296DiVA: diva2:608374
Conference
International Conference on Applied Energy ICAE 2013, Jul 1-4, 2013, Pretoria, South Africa
Projects
ACWA
Available from: 2013-02-27 Created: 2013-02-27 Last updated: 2015-11-16Bibliographically approved

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Olsson, JesperShabiimam, MANehrenheim, EmmaThorin, Eva
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Future Energy CenterSchool of Sustainable Development of Society and Technology
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CiteExportLink to record
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Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
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  • sv-SE
  • Other locale
More languages
Output format
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  • asciidoc
  • rtf