Enhancing methane production using various forms of steel shavings and their effect on microbial consortia during anaerobic digestion of swine wastewater

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dc.coverageDOI: 10.1016/j.jece.2024.113764
dc.creatorLauzurique, Yeney
dc.creatorSegura, Sofia
dc.creatorGuerra, Silvana
dc.creatorCarvajal, Andrea
dc.creatorHuiliñir, Cesar
dc.creatorPoblete-Castro, Ignacio
dc.date2024
dc.date.accessioned2025-11-18T19:50:08Z
dc.date.available2025-11-18T19:50:08Z
dc.description<p>Addressing the increasing demand for renewable energy while efficiently treating large volumes of industrial wastewater is imperative for mitigating climate change. In this sense, the addition of various forms of iron to the anaerobic digestion process of industrial wastewaters has shown improvements in methane production to varying extents. A promising waste rich in iron is steel shavings (SS) from the steel industry. However, the effect of the SS form, whether as metal powder or Fe ions, and their concentration on methane production and microbial composition during the biodigestion of swine wastewater remains poorly understood. This study investigates batch biodigesters supplemented with either raw SS or SS dissolved in HCl (as iron ions) at various concentrations. Results indicate that adding 0.13 mM of Fe from raw SS and 0.01 mM of SS as Fe ions, methane production increased by 35 % (277 mL CH<sub>4</sub> g VS<sup>−1</sup>) compared to control systems, with SS as Fe ions resulting in a higher methane production rate. The addition of raw SS promotes syntrophic bacteria, including acetogenic Candidatus Cloacamonas (39.4 %) and Clostridium sensu stricto (11.7 %), Synthrophomonas (9.7 %), and acetoclastic archaea Methanosaeta (0.26 %). Conversely, Proteobacteria Advenella (45.7 %) was the most prominent in biodigesters enriched with SS as Fe ions. This study is the first to demonstrate that the form of SS significantly affects the relative abundance of microorganisms using SS. Additionally, it shows that minimal supplementation of raw SS (7.26 mg/L) is sufficient to significantly enhance methane production, unlike the use of other waste iron materials.</p>eng
dc.identifierhttps://investigadores.uandes.cl/en/publications/eab0dcd2-84df-44f5-bc22-af93e2cb1b41
dc.identifier.urihttps://repositorio.uandes.cl/handle/uandes/56460
dc.languageeng
dc.rightsinfo:eu-repo/semantics/restrictedAccess
dc.sourcevol.12 (2024) nr.5
dc.subjectAnaerobic digestion
dc.subjectMethane production
dc.subjectMicrobial community
dc.subjectSteel shavings
dc.subjectSwine wastewater
dc.subjectSyntrophic interactions
dc.subjectSDG 7 - Affordable and Clean Energy
dc.subjectSDG 13 - Climate Action
dc.titleEnhancing methane production using various forms of steel shavings and their effect on microbial consortia during anaerobic digestion of swine wastewatereng
dc.typeArticleeng
dc.typeArtículospa
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