The biological methanation of H and CO in trickle bed reactors is one promising energy conversion technology for energy storage, but experiences at pilot-scale under real application conditions are still rare. Therefore, a trickle bed reactor with a reaction volume of 0.8 m was constructed and installed in a wastewater treatment plant to upgrade raw biogas from the local digester. The biogas HS concentration of about200 ppm was reduced by half, but an artificial sulfur source was required to completely satisfy the sulfur demand of the methanogens. Increasing the ammonium concentration to > 400 mg/L was the most successful pH control strategy, enabling stable long-term biogas upgrading at a CH production of 6.1 m/(m·d) with synthetic natural gas quality (CH > 98%). The results of this study with a reactor operation period of nearly 450 days, including two shutdowns, represents an important step towards the necessary full-scale integration.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.biortech.2023.128868 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Simultaneous utilization of CO and potassium-rich biomass for the environmentally friendly production of potassium formate.
RSC Adv
January 2025
Department of Chemistry, Chung-Ang University 84 Heukseok-ro, Dongjak-gu Seoul Republic of Korea
The C chemical species, potassium formate (K(HCO)), known as a two-electron reducing agent, finds application in the synthesis of multi-carbon compounds, including oxalate, and plays a crucial role not only in the food and pharmaceutical industries but also across various sectors. However, the direct hydrogenation of CO to produce K(HCO) remains a challenge. Addressing this issue, efficient production of K(HCO) is achieved by integrating CO hydrogenation in a trickle-bed reactor using a heterogeneous catalyst with a novel separation method that utilizes potassium ions from biomass ash for formic acid derivative product isolation.
View Article and Find Full Text PDFInfluence of Hydrogen and Ethanol Addition in Methanogen-Free Mixed Culture Syngas Fermentations in Trickle Bed Reactors.
Molecules
November 2024
Department of Chemical and Biochemical Engineering, Technical University of Denmark, 2800 Kongens Lyngby, Denmark.
The use of mixed cultures in gas fermentations could reduce operating costs in the production of liquid chemicals such as alcohols or carboxylic acids. However, directing reducing equivalents towards the desired products presents the challenge of co-existing competing pathways. In this study, two trickle bed reactors were operated at acetogenic and chain elongating conditions to explore the fate of electron equivalents (ethanol, H, and CO) and test pH oscillations as a strategy to target chain-elongated products.
View Article and Find Full Text PDFCatalytic Oxidation of Kraft Lignin in a Trickle-Bed Continuous Reactor.
Chempluschem
December 2024
Ircelyon, UMR 5256, CNRS, Universite Claude Bernard Lyon 12, Avenue Albert Einstein, F-69626, Villeurbanne Cedex, Lyon, France.
For the first time, the catalytic oxidation of Kraft lignin over a solid heterogeneous catalyst was studied in a continuous lab-scale trickle-bed reactor. This catalytic process is able to depolymerize Kraft lignin and produce phenolic compounds of interest such as vanillin. The impact of operating conditions such as temperature, residence time, contact time, catalyst loading and lignin concentration was evaluated.
View Article and Find Full Text PDFCharacterization of the metabolism of the yeast growing as a biofilm.
FEMS Microbes
August 2024
Department of Biotechnology, Institute of Microbiology and Microbial Biotechnology, BOKU University, Muthgasse 18, 1190 Vienna, Austria.
Article Synopsis
- This research focuses on a specific yeast known for its ability to adapt and produce various products from different carbon sources while existing in either planktonic (free-floating) or biofilm states.
- The study compares the metabolic activities of the yeast in both states, using traditional stirred tank bioreactors for planktonic cultivation and trickle bed bioreactors for biofilm cultivation.
- Results show that although biofilm cultivation has lower overall productivity, the production rate remains steady, highlighting its potential for continuous production processes when supplied with enriched oxygen.
Efficient strategy for employing HN-AD bacterium enhanced biofilter reactors to remove NH and reduce secondary pollution.
J Hazard Mater
December 2024
CAS Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, PR China. Electronic address:
Article Synopsis
- - The study focused on using the Heterotrophic nitrification-aerobic denitrification strain Paracoccus denitrificans HY-1 in a biological trickling filter (BTF) reactor to improve ammonia (NH) removal efficiency, achieving a high rate of 96.52% under specific conditions.
- - Results showed that after inoculation with HY-1 and using bamboo charcoal as filler, levels of ammonia and other nitrogen compounds in the circulating fluid were significantly low, indicating effective nitrification and denitrification processes.
- - The HY-1 inoculated BTF was tested in a large-scale piggery setting, successfully removing 99.61% of ammonia and 96.63% of hydrogen
Want 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!