High-solid digestion - A comparison of completely stirred and plug-flow reactor systems

Copyright © 2024 The Author(s). Published by Elsevier Ltd.. All rights reserved.

Bibliographische Detailangaben
Veröffentlicht in:Waste management (New York, N.Y.). - 1999. - 189(2024) vom: 01. Sept., Seite 265-275
1. Verfasser: Perman, Ebba (VerfasserIn)
Weitere Verfasser: Karlsson, Anna, Westerholm, Maria, Isaksson, Simon, Schnürer, Anna
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2024
Zugriff auf das übergeordnete Werk:Waste management (New York, N.Y.)
Schlagworte:Journal Article Comparative Study Completely stirred-tank reactors High-solid digestion Microbial community structure Plug-flow reactors Process performance Solid Waste Biofuels Methane mehr... OP0UW79H66 RNA, Ribosomal, 16S
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520 |a Copyright © 2024 The Author(s). Published by Elsevier Ltd.. All rights reserved. 
520 |a High-solid digestion (HSD) for biogas production is a resource-efficient and sustainable method to treat organic wastes with high total solids content and obtain renewable energy and an organic fertiliser, using a lower dilution rate than in the more common wet digestion process. This study examined the effect of reactor type on the performance of an HSD process, comparing plug-flow (PFR) type reactors developed for continuous HSD processes, and completely stirred-tank reactors (CSTRs) commonly used for wet digestion. The HSD process was operated in thermophilic conditions (52 °C), with a mixture of household waste, garden waste and agricultural residues (total solids content 27-28 %). The PFRs showed slightly better performance, with higher specific methane production and nitrogen mineralisation than the CSTRs, while the reduction of volatile solids was the same in both reactor types. Results from 16S rRNA gene sequencing showed a significant difference in the microbial population, potentially related to large differences in stirring speed between the reactor types (1 rpm in PFRs and 70-150 rpm in CSTRs, respectively). The bacterial community was dominated by the genus Defluviitoga in the PFRs and order MBA03 in the CSTRs. For the archaeal community, there was a predominance of the genus Methanoculleus in the PFRs, and of the genera Methanosarcina and Methanothermobacter in the CSTRs. Despite these shifts in microbiology, the results showed that stable digestion of substrates with high total solids content can be achieved in both reactor types, indicating flexibility in the choice of technique for HSD processes 
650 4 |a Journal Article 
650 4 |a Comparative Study 
650 4 |a Completely stirred-tank reactors 
650 4 |a High-solid digestion 
650 4 |a Microbial community structure 
650 4 |a Plug-flow reactors 
650 4 |a Process performance 
650 7 |a Solid Waste  |2 NLM 
650 7 |a Biofuels  |2 NLM 
650 7 |a Methane  |2 NLM 
650 7 |a OP0UW79H66  |2 NLM 
650 7 |a RNA, Ribosomal, 16S  |2 NLM 
700 1 |a Karlsson, Anna  |e verfasserin  |4 aut 
700 1 |a Westerholm, Maria  |e verfasserin  |4 aut 
700 1 |a Isaksson, Simon  |e verfasserin  |4 aut 
700 1 |a Schnürer, Anna  |e verfasserin  |4 aut 
773 0 8 |i Enthalten in  |t Waste management (New York, N.Y.)  |d 1999  |g 189(2024) vom: 01. Sept., Seite 265-275  |w (DE-627)NLM098197061  |x 1879-2456  |7 nnns 
773 1 8 |g volume:189  |g year:2024  |g day:01  |g month:09  |g pages:265-275 
856 4 0 |u http://dx.doi.org/10.1016/j.wasman.2024.08.025  |3 Volltext 
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