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Methane emissions - Europe PMC

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Last Updated: 08 May 2022

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Effects and microbial mechanisms of phosphogypsum and medical stone on organic matter degradation and methane emissions during swine manure composting.

The degradation of organic matter and CH 4 emissions during composting has a significant effect on composting's effectiveness and greenhouse effect. This report investigated the effects of adding phosphogypsum and medical stone on OM breakdown, CH4 emissions, and their underlying mechanisms. During the cooling and maturity stages, enzymes related to CH 4 publication inhibited enzyme production during the cooling and maturity phases. PPG and MS may have affected OM degradation and CH 4 leaks during composting, by changes in bacterial metabolism and enzyme activity levels. According to network analysis and partial least-squares route modeling results, PPG and MS may have modified methanogens' behaviour to influence the change of carbon and CH 4 emissions. These findings add to the findings at the molecular level about the impacts of PPG and MS on OM degradation and CH4 emissions during composting, thus facilitating the use of PPG and MS in composting systems.

Source link: https://europepmc.org/article/MED/35512600


Ambient ultraviolet radiation: A new factor affecting anaerobic fermentation of oat and subsequent methane emissions.

To investigate the effects of ambient ultraviolet radiation on the Qinghai-Tibetan Plateau's anaerobic fermentation and subsequent methane emissions, oats grown under different ambient UV conditions were fermented with molasses and Lactobacillus plantarum inoculant treatments. During in vitro ruminal digestion, UV2 treatment raised the acid detergent fiber contents after anaerobic fermentation and raised methane emissions by 8. 5-14. 9 percent.

Source link: https://europepmc.org/article/MED/35489577


Methane emissions from US low production oil and natural gas well sites.

Only 6% of the nation's O&G industry production in 2018 stood at eighty percent of American oil and natural gas production sites, with average production of 15 barrels per day and just 6% of the country's O&G output in 2019. Low production well sites in the United States account for roughly half of all O&G well site CH4 emissions and a production-normalized CH4 loss rate of more than 10% relative to all O&G well sites in the United States.

Source link: https://europepmc.org/article/MED/35440563


Enteric methane emissions, growth, and carcass characteristics of feedlot steers fed a garlic and citrus based feed additive in diets with three different forage concentrations.

Corn silage was added to 15% of the diet DM with or without Mootral from day 85 to slaughter. On a g/d and a g/kg of DMI basis, Mootral did not influence methane emissions from days 42 to 46, but there was a forage effect, where steers fed the 68% corn silage produced more methane on a g/d and a g/kg basis, leading to greater methane on a g/kg BW basis, rather than steers fed the 15% corn silage diet. Stes fed Mootra from 203 to 207 in comparison to steers not fed Mootral on a g/d, g/kg DMI, and g/kg BW basis. The interaction of forage concentration and Mootral decreased DMI of steers fed 15% corn silage from 0 to 84, where Mootral also reduced DMI of steers fed 15% corn silage but did not influence DMI of steers fed 41. 5 or 68% corn silage. No effects of forage concentration or Mootral on BW or average daily gain at any time, or on DMI from 84 to slaughter or both. Intake from d 0-84 and overall was lower and gain: feed from d 0-84 and overall was higher for steers fed 68% over compared to steers fed 41. 5% corn silage. From day 0 to 84, the number of steers fed 68% corn silage was up 5 percent over the equivalent to steers fed 41. 5% corn silage. In conclusion, increasing forage concentrations increased methane emissions and Mootral decreased methane production in 15% corn silage diets, which also helped with carcass leanness.

Source link: https://europepmc.org/article/MED/35426435


Bovine host genome acts on rumen microbiome function linked to methane emissions.

We found 29/22/115 microbial genera/RUGs/genes host-genomically linked to emissions of the potent greenhouse gas methane, demonstrating the importance of a joint host genomic surveillance of specific microbial processes and CH 4. A percentage of mean CH 4 emissions per generation of the 30 most measurable microbial genes estimated in our population is 17%, which is higher than for selection based on measured CH 4 emissions using respiration chambers, demonstrating the potential of microbiome-driven breeding to reduce CH 4 emissions and mitigate climate change.

Source link: https://europepmc.org/article/MED/35414107


Human metabolic emissions of carbon dioxide and methane and their implications for carbon emissions.

Dermal emissions of CO 2 and CH 4 were only responsible for 3. 5% and 5. 5% to the whole-body emissions, respectively. According to one third of the volunteers' surveys as CH4 producers, one third of the volunteers was identified as CH 4 producers. These CH 4 farmers' exhaled CH4 emission rate was ten times higher than the rest of the volunteers' average. With increasing global population and projected reduction in global anthropogenic carbon pollution in the next decade, carbon dioxide emissions from humans may play an increasing role in regional and global carbon budgets.

Source link: https://europepmc.org/article/MED/35421492


Detailed Speciation of Non-Methane Volatile Organic Compounds in Exhaust Emissions from Diesel and Gasoline Euro 5 Vehicles Using Online and Offline Measurements.

The characterization of vehicle exhaust emissions of volatile organic compounds is vital in determining their effect on secondary organic aerosol formation and, more generally, air quality. This paper revisits and assesses non-methane volatile organic compounds tailpipe emissions of three Euro 5 vehicles during Artemis cold urban and motorway cycles. For the first time on proton transfer reaction time-of-flight mass spectrometer results of vehicular emissions, a positive matrix factorization study is carried out. Intermediate volatility organic compounds account for the diesel vehicles' emissions, which consisting of essentially linear alkanes for the diesel vehicle, are present in 3. 2 percent of the IVOC fraction, while naphthalene accounts for 42 percent of the IVOC fraction for the gasoline cars. This work demonstrates that PMF's analysis of vehicular emissions and GC-MS analysis of vehicular emissions to enrich existing emission standards.

Source link: https://europepmc.org/article/MED/35448445

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions