Fermentation gases

In the production of tropical meads, Ukpabi (2006) recommends the use of sturdy bottles to avoid bottle breakage, due to possible high internal pressure (from fermentation gases) if refermentation occurs, as well as the use of cork or equivalent for stoppering the bottles. 

Different types of water, fermentation gases, headspace over microorganism cultures... 

Further reports of organoantimony compounds in the environment concerned volatile metalloid species in sewage and landfill fermentation gases, and in hot springs. Trimethylantimony was found in these emissions ... 

Figure 2. Gas chromatographic curves for volatiles. Key Curve 1, standard mix in water of less than 1% each of methanol, ethanol, diethyl ether, and acetone flushed with He, trapped and tested on Poropak Q as were the fermentation gases (FID) Curve 2, gas phase of eight-day fermentation trapped and tested as described in text (FID) Curve 3, collected and counted GC effluents (see text) Curve 4, standard mix of 0.1% each methanol, ethanol, acetone, and acetic acid and Curve 5, water phase of fermentation.

As indicated in the introduction, the energy losses in urine (Euri) and in fermentation gases (methane Egas) were taken into account in the calculation of the ME content of feed materials. An analysis of the data obtained in 50-70 kg growing pigs and in the adult sow (n = 610 Noblet,... 

Since the DE system may lead to an overestimation of the energy value of protein-rich feed materials, it is recommended that formulation of diets should be performed on a ME basis, by taking into account an average estimation of energy losses in urine and fermentation gases. 

The connected gluten framework formed in this way is responsible for the gas retention capacity of wheat dough. In fact, stands which are as thick as possible but easily extensible under the pressure of the fermentation gases are of advantage for the stability of the dough. 

Feldmann, J., Koch, I., and Cullen, W. R. (1998) Complementary use of capillary gas chromatography-mass spectrometry (ion trap) and gas chromatography-inductively coupled plasma mass spectrometry for the speciation of volatile antimony, tin and bismuth compounds in landfill and fermentation gases. Analyst, 123, 815-20. 

Bloat (tympany) Dysfunction of the digestive tract of ruminants characterized by intraruminal pressure buildup due to the accumulation of fermented gases. As a result, there is a distention of the left side of the abdomen and accumulation of toxic metabolites that can kill the animal. 

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