An aerobic Lactobacillus plantarum culture displayed growth stagnation during early growth. Transcriptome analysis revealed that resumption of growth after stagnation correlated with activation of CO2-producing pathways, suggesting that a limiting CO2 concentration induced the stagnation. Analogously, increasing the CO2 gas partial pressure during aerobic fermentation prevented the temporal growth stagnation.
- American Society for Microbiology
- Improvement of lactobacillus plantarum aerobic growth as ...
The risks of spreading slurry after first silage cut
Livestock farmers spreading slurry onto fields after first-cut grass silage face heightened risks of contamination after this year’s early start to the season, a silage specialist is warning, especially if following the current trend to more frequent silage cutting.The risks of spreading slurry after first silage cut According to Ecosyl silage expert, Darran Ward, spreading slurry after first-cut always poses a risk – because of the challenge of achieving the 10-week interval typically recommended...
Industrial Anaerobic Biological Fermentation - Case Study
The cooperation between the above mentioned innovative companies forces to impressive results. Hager & Elsässer planned the Aquatyx R2S reactor-technology which is installed in glass lined steel tanks from GLS Tanks International.AQUATYX is primarily for industrial anaerobic biological fermentation of highly polluted wastewater, as they are to also found for example in the paper industry.The two-step, into a tank mounted GLS system, characterized by a low footprint, high degradation rate and gas yield,...
Case study - China Resources Gas Group Ltd
Anaerobic fermentation project with waste water in Qidong Jiangsu Province, China. The purification project was set up in order to connect the biogas to the city’s gas pipeline. The customer’s challenge Biogas upgrading: the Group aims to make use of what would ordinarily be a by-product – waste water. Gas is extracted from a water treatment process, using the contaminants found in waste water (energy-rich hydrocarbons – the same components that make up natural gas). The microbes used...
Greene King Brewery gas leak – carbon dioxide in breweries
On Thursday 15 October 2015, a carbon dioxide leak occurred at the Greene King Brewery on an estate in Bury St Edmunds in Suffolk. Emergency services were sent to the incident and nearby residents were evacuated as a precaution. Twenty people were rescued from the building, and the incident was quickly taken control of. Thankfully there were no injuries as everyone involved reacted quickly, but it could have been a very different story. This blog post will look at carbon dioxide in breweries – how it is...
Conversion of sewage sludge to commodity chemicals via syngas fermentation
Gasification of sewage sludge allows the recovery of energy, and produces a mix of CO, CO2 and H2 called synthesis gas (or syngas), which can be fermented by acetogenic bacteria to added-value products. This work presents the conversion of syngas to organic acids and alcohols using both pure and mixed cultures. Pure culture kinetic experiments with Clostridium carboxidivorans P7 resulted in the production of high concentrations of acetate (454 mgC/L) and ethanol (167 mgC/L). The pH was the main factor driving...