We measured the carbon isotopic composition of pore water carbon dioxide from Sallie's Fen, a New Hampshire poor fen. The isotope profiles are used in combination with a one-dimensional diffusion-reaction model to calculate rates of methane production, oxidation and transport over an annual cycle. We show how the rates vary with depth over a seasonal cycle, with methane produced deeper during t...

Recently Keppler et al. (2006) discovered a surprising new source of methane – terrestrial plants under aerobic conditions, with an estimated global production of 62– 236 Tg yr−1 by an unknown mechanism. This is ∼10–40% of the annual total of methane entering the modern atmosphere and ∼30–100% of annual methane entering the preindustrial (0 to 1700 AD) atmosphere. Here we test this reported glo...

Six laboratory scale biogas mixed anaerobic digesters were operated to study the effect of biogas recycling rates and draft tube height on their performance. The digesters produced methane at 0.40-0.45 L per liter of digester volume per day. A higher methane production rate was observed in unmixed digesters, while increased biogas circulation rate reduced methane production. However, different ...

Microbially enhanced coalbed methane technology must be used to increase the methane content in mining and generate secondary biogenic gas. In this technology, the metabolic processes of methanogenic consortia are the basis for the production of biomethane from some of the organic compounds in coal. Thus, culture nutrition plays an important role in remediating the nutritional deficiency of a c...

In natural environments methane is usually produced by aceticlastic and hydrogenotrophic methanogenic archaea. However, some methanogens can use C(1) compounds such as methanol as the substrate. To determine the contributions of individual substrates to methane production, the stable-isotope values of the substrates and the released methane are often used. Additional information can be obtained...

Production and build-up of sulfide and methane in wastewater collections systems cause several detrimental effects including odour nuisance, health hazards due to its toxicity and corrosion of pipes and inlet structures of sewage treatment plants. On the other hand methane is a greenhouse gas significantly contributing to global warming. Despite these major impacts, sewer-produced sulfide and m...

Methane production has been measured from lambs fed contrasting forages. This work has been driven by the need to reduce greenhouse gas emissions from agriculture and to determine energy losses to methane from contrasting diets. Young ram lambs were fed either fresh ryegrass/white clover pasture, lucerne (also pelleted lucerne), sulla, chicory, red clover, Lotus pedunculatus (lotus) and mixture...

Seventy-six Angus steers chosen from breeding lines divergently selected for residual feed intake (RFI) were studied to quantify the relationship between RFI and the daily rate of methane production (MPR). A 70-d feeding test using a barley-based ration was conducted in which the voluntary DMI, feeding characteristics, and BW of steers were monitored. The estimated breeding value (EBV) for RFI ...

Citation: Mi L, Yang B, Hu X, Luo Y, Liu J, Yu Z and Wang J (2018) Comparative Analysis of the Microbiota Between Sheep Rumen and Rabbit Cecum Provides New Insight Into Their Differential Methane Production. Front. Microbiol. 9:575. doi: 10.3389/fmicb.2018.00575 Comparative Analysis of the Microbiota Between Sheep Rumen and Rabbit Cecum Provides New Insight Into Their Differential Methane Produ...

This report presents an overview of the enteric methane production in cattle. The possibilities are discussed to influence methane production by feeding measures and the use of feed additives, and by management measures. The possibilities are discussed against the background of Dutch cattle husbandry and points for attention and priorities for future research have been formulated.