Results 121 to 130 of about 50,699 (238)

Environmentally adjusted productivity growth and shadow prices for dairy farms

open access: yesCanadian Journal of Agricultural Economics/Revue canadienne d'agroeconomie, EarlyView.
Abstract We estimate the environmentally adjusted productivity growth and shadow price for Ontario dairy farms. We use an input‐oriented directional distance function and farm‐level data from 2000 to 2020. First, we find that while GHG emissions per cow increase with higher milk yields, emission intensity decreases as milk yield per cow increases.
Bibek Dahal   +2 more
wiley   +1 more source

Remarkable Capacity for Anaerobic Oxidation of Methane at High Methane Concentration

open access: yesGeophysical Research Letters, 2019
AbstractAnaerobic oxidation of methane (AOM), a central process in the carbon cycle of anoxic environments, moderates the release of methane from soils and sediments to water bodies and, ultimately, the atmosphere. The regulation of AOM in the environment remains poorly constrained.
M.W. Bowles   +6 more
openaire   +1 more source

Effect of Moderate Heat on TCE Reductive Dechlorination Rates in Groundwater

open access: yesGroundwater Monitoring &Remediation, EarlyView.
Abstract Low‐temperature heating (in the mesophilic range of ~15 to 40 °C) of contaminated aquifers offers the prospect of increasing the rates for biotic and abiotic treatment of volatile organic compounds. Thermal In Situ Sustainable Remediation (TISR®) is one of the approaches available to implement low temperature heating.
David L. Freedman   +3 more
wiley   +1 more source

Anaerobic oxidation of short-chain alkanes in hydrothermal sediments: potential influences on sulfur cycling and microbial diversity

open access: yesFrontiers in Microbiology, 2013
Short-chain alkanes play a substantial role in carbon and sulfur cycling at hydrocarbon-rich environments globally, yet few studies have examined the metabolism of ethane (C2), propane (C3), and butane (C4) in anoxic sediments in contrast to methane (C1).
Melissa M Adams   +4 more
doaj   +1 more source

Performance Evaluation of a Full‐Scale Anaerobic Internal Circulation Reactor Treating Calcium Rich Dairy Industry Wastewater

open access: yesWater and Environment Journal, EarlyView.
This study investigates the impact of calcium on the performance of a large‐scale internal circulation (IC) reactor treating calcium‐rich dairy wastewater. Excessive calcium concentrations (400‐600 mg L−1) resulted in calcification of the anaerobic sludge, reactor walls, and pipes, suggesting a 17% and 25% reduction in biogas and methane production ...
O. D. Yepez‐Ceron   +4 more
wiley   +1 more source

Microbiology, ecology and application of the nitrite-dependent anaerobic methane oxidation process

open access: yesFrontiers in Microbiology, 2012
Nitrite-dependent anaerobic methane oxidation (n-damo), which couples the anaerobic oxidation of methane to denitrification, is a recently discovered process observed in Candidatus Methylomirabilis oxyfera. M.
Li-Dong eShen, Bao-lan eHu
doaj   +1 more source

Microbial Effects on Repository Performance [PDF]

open access: yes, 2010
This report presents a critical review of the international literature on microbial effects in and around a deep geological repository for higher activity wastes.
Humphreys, Paul   +2 more
core  

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