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Potential of medium chain fatty acids production from municipal solid waste leachate: Effect of age and external electron donors

Saadoun, Lamia ; Campitelli, Alessio ; Kannengiesser, Jan ; Stanojkovski, Daniel ; El Alaoui El Fels, Abdelhafid ; Mandi, Laila ; Ouazzani, Naaila (2022):
Potential of medium chain fatty acids production from municipal solid waste leachate: Effect of age and external electron donors. (Publisher's Version)
In: Waste Management, 120, pp. 503-512. Elsevier, ISSN 0956-053X,
DOI: 10.26083/tuprints-00021431,
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Item Type: Article
Origin: Secondary publication service
Status: Publisher's Version
Title: Potential of medium chain fatty acids production from municipal solid waste leachate: Effect of age and external electron donors
Language: English
Abstract:

A large quantity of leachate is generated during municipal solid waste collection operation and in landfills due to the large amount of organic waste and high humidity. The content of medium chain fatty acids (MCFAs) in the leachate is a low cost feedstock for bio-based chemical and fuel production processes. The aim of this study is to investigate the MCFA production potential of three leachate ages through chain elongation process under uncontrolled pH batch test. Moreover, the effect of using different external electron donors (ethanol, methanol and a mixture of both) is studied. The experiment consists of characterizing the samples then adding external electron donors with a specific ratio to leachate samples under mesophilic temperature. For this investigation, also a statistical analysis is done, which shows the production of MCFAs is highly influenced by leachate age. The results indicate that the production of even-numbered acids increase from 600 to 1,000 mg/L by the end of the ethanol chain elongation experiment for young leachate. However, a higher MCFA production of more than 1,000 mg/L is achieved by using the mixture of methanol and ethanol as electron donor. Furthermore, all methanol chain elongation experiments lead to an odd-numbered production of MCFAs, such as pentanoic and heptanoic acids. These results confirm the potential improvement of MCFA production from leachate through choosing the optimal leachate age and electron donor. Overall, producing MCFAs from leachate is a good example of circular bio-economy because waste is used to produce biochemicals, which closes the material cycle.

Journal or Publication Title: Waste Management
Volume of the journal: 120
Publisher: Elsevier
Classification DDC: 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften
Divisions: 13 Department of Civil and Environmental Engineering Sciences > Institute IWAR > Material Flow Management and Resource Economy
TU-Projects: DLR|01DG17011|Trans4Biotec
DAAD|ID57357946|Partnerschaft mit Su
Date Deposited: 24 May 2022 10:05
Last Modified: 24 May 2022 10:05
DOI: 10.26083/tuprints-00021431
Corresponding Links:
URN: urn:nbn:de:tuda-tuprints-214318
Additional Information:

Keywords: Medium chain fatty acid, Leachate, Municipal solid waste, External electron donor, Circular bio-economy, Bio-based products

URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/21431
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