This study investigated the operation of ex-situ biological methanation at two thermophilic temperatures (55°C and 65°C). Methane composition of 85-88% was obtained and volumetric productivities of 0.45 and 0.4LCH/Lreactor were observed at 55°C and 65°C after 24h respectively. It is postulated that at 55°C the process operated as a mixed culture as the residual organic substrates in the starting inoculum were still available. These were consumed prior to the assessment at 65°C; thus the methanogens were now dependent on gaseous substrates CO and H. The experiment was repeated at 65°C with fresh inoculum (a mixed culture); methane composition and volumetric productivity of 92% and 0.46LCH/Lreactor were achieved in 24h. Methanothermobacter species represent likely and resilient candidates for thermophilic biogas upgrading.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.biortech.2016.11.066 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Retraction: Design and development of highly sensitive PEDOT-PSS/AuNP hybrid nanocomposite-based sensor towards room temperature detection of greenhouse methane gas at ppb level.
RSC Adv
January 2025
Department of Biology, Faculty of Science, University of Tabuk Tabuk-71491 Kingdom of Saudi Arabia.
[This retracts the article DOI: 10.1039/D1RA00994J.].
View Article and Find Full Text PDFMitigating enteric methane emissions with Madhuca longifolia phenolic extract supplementation in forages and diets through in vitro fermentation to support climate-resilient livestock production.
J Environ Manage
January 2025
Murdoch University, Murdoch, WA, 6150, Australia. Electronic address:
Reducing enteric methane emissions from livestock is a key environmental challenge, as methane is a major pollutant. The complexity of animal biology and diverse diet compositions make it difficult to develop strategy to control methane production. This study examined the use of plant phenolic extracts of Madhuca longifolia (ML-7) as a feed additive combined with various ruminant diets and dosages to find an effective supplement to reduce methane emissions.
View Article and Find Full Text PDFAddition of microbial consortium to the rice straw biomethanization: effect on specific methanogenic activity, kinetic and bacterial community.
Prep Biochem Biotechnol
January 2025
Centro Universitario Municipal de Taguasco "Enrique José Varona", Universidad de Sancti Spíritus "José Martí Pérez", Sancti Spíritus, Cuba.
The biomethanization of lignocellulosic wastes remains an inefficient and complex process due to lignin structures that hinder the hydrolysis step, therefore, some treatments are required. This work describes the addition of an enriched microbial consortium in the biomethanization of rice straw. The experiment was carried out in lab batch reactors following two strategies: (i) pretreatment of rice straw for 48 h using the enriched microbial consortium (dilution 1:100), and (ii) addition of this enriched microbial consortium (dilution 1:100) directly to the anaerobic reactors (bioaugmentation).
View Article and Find Full Text PDFImpact of trace metal supplementation on anaerobic biological methanation under hydrogen and carbon dioxide starvation.
NPJ Biofilms Microbiomes
January 2025
Department of Biology, University of Padua, via U. Bassi 58/b, 35131, Padova, Italy.
Biomethanation is a crucial process occurring in natural and engineered systems which can reduce carbon dioxide to methane impacting the global carbon cycle. However, little is known about the effect of on-and-off gaseous provision and micronutrients on bioconversion. Here, anaerobic microbiomes underwent intermittent feeding with incremental starvations and selective metal supplementation to assess the impact of hydrogen and carbon dioxide availability on microbial physiology.
View Article and Find Full Text PDFMicrobial activity of the inoculum determines the impact of activated carbon, magnetite and zeolite on methane production.
Sci Total Environ
January 2025
CEB - Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal; LABBELS - Associate Laboratory, Guimarães, Braga, Portugal. Electronic address:
The conversion of organic matter to methane through anaerobic digestion (AD) process can be enhanced by different materials. However, literature reports show inconsistent results on the effect of materials in different AD systems. In this study, we evaluated the influence of the inoculum's activity on methane production (MP) efficiency in the presence of different materials (activated carbon (AC), magnetite (Mag), and zeolite (Zeo)).
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!