Results 21 to 30 of about 6,141,379 (239)

Productivity characteristics and main controlling factors of coalbed methane wells in Gujiao Block

open access: yesMeikuang Anquan
Coalbed methane (CBM) resources are abundant in Gujiao Block at the central part of Xishan Coalfield, where the production capacity of the regional single well varies greatly due to multiple factors, and the large-scale development of CBM faces severe ...
Zhiyu DENG   +5 more
doaj   +1 more source

Silage of the organic fraction of municipal solid waste to improve methane production

open access: yesWater Science and Technology, 2021
The silage of the organic fraction of municipal solid waste (OFMSW) is a common practice in biogas plants. During silage, fermentation processes take place, affecting the later methanisation stage.
Mario F. Castellón-Zelaya   +1 more
doaj   +1 more source

Study on the best time of refracturing for Hancheng coal seam

open access: yesMeikuang Anquan
The old wells in Hancheng Block face the problem of production decline after long-term exploitation, and need to be re-fractured to form new fractures to communicate with CBM rich areas, so as to achieve stable CBM production. Due to the small difference
Wei WANG   +5 more
doaj   +1 more source

Biogas production of Chicken Manure by Two-stage fermentation process

open access: yesE3S Web of Conferences, 2018
This paper performs a batch experiment for pre-acidification treatment and methane production from chicken manure by the two-stage anaerobic fermentation process.
Liu Xin Yuan   +5 more
doaj   +1 more source

METHANE PRODUCTION IN DAIRY COWS

open access: yesJournal of Dairy Science, 1979
Abstract The relationship among diet composition, intake, and methane production was investigated with data during 404 total energy balance trials with Holstein cows. Methane production in all trial was measure in open circuit respiration chambers. The most useful predictor of total methane productin was amounts of soluble residue, hemicellulose, and
P.W. Moe, H.F. Tyrrell
openaire   +1 more source

Fracturing location optimization of floor coalbed methane wells with high water content in Hancheng Block

open access: yesMeikuang Anquan
In order to study the influence of fracturing location on the production of coalbed methane wells in floor with high water content, the 11# coal seam in Hancheng Block was taken as the research background, and Petrel integrated geological engineering ...
Wei WANG   +5 more
doaj   +1 more source

Strengthening mechanism of cemented hydrate‐bearing sand at microscales

open access: yesGeophysical Research Letters, 2016
On the basis of hypothetical particle‐level mechanisms, several constitutive models of hydrate‐bearing sediments have been proposed previously for gas production.
Jun Yoneda   +3 more
doaj   +1 more source

Development and Application of Dual-Tubing Jet Pump Full-Process Pressure-Maintained Drainage String in Deep Coal-Rock Gas Wells

open access: yesShiyou jixie
Deep coal-rock gas reservoir is sensitive to downhole pressure variation, and implementing kill operation may cause damage to gas production. Consequently, a full-process pressure-maintained operation technique of dual-tubing jet pump for deep coal-rock ...
Wu Jianjun   +6 more
doaj   +1 more source

Anaerobic Digestion Technology for Methane Production Using Deer Manure Under Different Experimental Conditions

open access: yesEnergies, 2019
Anaerobic digestion (AD) is an important technology for the treatment of livestock and poultry manure. The optimal experimental conditions were studied, with deer manure as a fermentation material and mushroom residue as an inoculum.
Hanxi Wang   +5 more
doaj   +1 more source

Evaluation of the methane paradox in four adjacent pre-alpine lakes across a trophic gradient

open access: yesNature Communications, 2023
Contrasting the paradigm that methane is only produced in anoxic conditions, recent discoveries show that oxic methane production (OMP, aka the methane paradox) occurs in oxygenated surface waters worldwide.
César Ordóñez   +5 more
doaj   +1 more source

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