Anaerobic Digestion Performance: Separate Collected vs. Mechanical Segregated Organic Fractions of Municipal Solid Waste as Feedstock

Przemysław Seruga , Małgorzata Krzywonos , Anna Seruga , Łukasz Niedźwiecki , Halina Pawlak-Kruczek , Agnieszka Urbanowska

Abstract

The replacement of fossil fuel with renewable energy sources seems as though it will be crucial in the future. On the other hand, waste generation increases year by year. Thus, waste-to-energy technologies fit in with the actual trends, such as the circular economy. The crucial type of generated waste is municipal solid waste, which is in the research area. Regarding the organic fraction of municipal solid waste (OFMSW), anaerobic digestion (AD) allows the recovery of biogas and energy. Furthermore, if it is supported by source segregation, it should allow the recovery of material as fertilizer. The AD process performance (biogas yield and stability) comparison of source-segregated OFMSW (ss-OFMWS) and mechanically sorted OFMSW (ms-OFMSW) as feedstocks was performed in full-scale conditions. The daily biogas volume and methane content were measured to assess AD efficiency. To verify the process stability, the volatile fatty acid (VFA) content, pH value, acidity, alkalinity, and dry matter were determined. The obtained biogas yield per ton was slightly higher in the case of ss-OFMSW (111.1 m3 /ton), compared to ms-OFMSW (105.3 m3 /ton), together with a higher methane concentration: 58–60% and 51–53%, respectively, and followed by a higher electricity production capacity of almost 700 MWh for ss-OFMSW digestion. The obtained VFA concentrations, at levels around 1.1 g/kg, pH values (slightly above 8.0), acidity, and alkalinity indicate the possibilities of the digester feeding and no-risk exploitation of either as feedstock.
Author Przemysław Seruga (PE / DBE)
Przemysław Seruga,,
- Department of Bioprocess Engineering
, Małgorzata Krzywonos (PE / DBE)
Małgorzata Krzywonos,,
- Department of Bioprocess Engineering
, Anna Seruga - [Uniwersytet Ekonomiczny we Wrocławiu]
Anna Seruga,,
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, Łukasz Niedźwiecki - Wrocław University of Science and Technology (PWr)
Łukasz Niedźwiecki,,
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, Halina Pawlak-Kruczek - Wrocław University of Science and Technology (PWr)
Halina Pawlak-Kruczek,,
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, Agnieszka Urbanowska - Wrocław University of Science and Technology (PWr)
Agnieszka Urbanowska,,
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Journal seriesEnergies, [ENERGIES], ISSN 1996-1073, (N/A 140 pkt)
Issue year2020
Vol13
No15
Pages1-14
Publication size in sheets0.65
Keywords in Englishenergy recovery, biogas, organic waste, food waste, green waste, process contro
ASJC Classification1700 General Computer Science
DOIDOI:10.3390/en13153768
Languageen angielski
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Seruga_Krzywonos_Seruga_Niedzwiecki_Pawlak-Kruczek_Urbanowska_Anaerobic_ Digestion_ Performance2020.pdf 2,16 MB
Score (nominal)140
Score sourcejournalList
Publication indicators Scopus SNIP (Source Normalised Impact per Paper): 2018 = 1.156; WoS Impact Factor: 2018 = 2.707 (2) - 2018=2.99 (5)
Citation count*1 (2020-11-24)
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