Hydrogen-oxidizing bacteria

Hydrogen Photosynthetic bacteria, methane oxidation A few years... 

Kersters, K., Auling, G., De-Ley, J., 1989. Hydrogenophaga, a new genus of hydrogen-oxidizing bacteria that includes H. flava comb. nov. (formerly Pseudomonas flava), H. palleronii (formerly Pseudomonas palleronii), H. pseudoflava (formerly Pseudomonas pseudoflava and P. carboxydoflava), H. taeniospiralis (formerly P. taeniospiralis). Sys. Bacteriol. 39, 319-333. 

Bowien B, HG Schlegel (1981) Physiology and biochemistry of hydrogen-oxidizing bacteria. Annu Rev Microbiol 35 405-452. 

Wild-type microorganisms such as hydrogen-oxidizing and methanogenic bacteria would be competitors, growing like weeds, in systems for H2 production, and have to be excluded. 

Hydrogen oxidation H2 O2, possibly NO3- CO2 4H2 + O2 + CO2 [CH2O] + 3H2O Mesophilic bacteria detected by activity measurements... 

Hydrogen oxidation Iron reduction H2 Organic acids N03- Fe - (oxyhydroxides) OO2 Organic acids Identified from molecular analyses Mesophilic bacteria and hyperthermophilic archaea... 

The hydrogen-oxidizing bacteria. Species from several genera including Hydrogenomonas, Pseudomonas, and Alcaligenes oxidize H2 with oxygen ... 

The capacity of chemoautotrophic bacteria to oxidize hydrogen sulfide as a source of energy for CO2 fixation is well known (20). However, the realization that entire bacterial and invertebrate communities can be fueled by... 

Some microbes can produce organic acids, such as formic and succinic, or mineral acids such as sulfuric acid. Some bacteria can oxidize sulfur or sulfide to sulfate or reduce sulfates, very often to hydrogen sulfide as end product. (Dexter)14... 

Huber R., Wilharm T., Huber D., Trincone A., Burggraf S., Konig H., Rachel R., Rockinger 1., Ericke H., and Stetter K. O. (1992) Aquifex pyrophilus gen. nov., sp. nov., represents a novel group of marine hyperthermophilic hydrogen-oxidizing bacteria. Syst. Appl. Microbiol. 15, 340-351. 

Chemosynthesis—The chemical process by which bacteria, by oxidizing hydrogen sulfide, serve as primary producer for a marine community. 

Hydrogen Oxidation Kinetics. Shea et al. (22) studied the kinetics of methane fermentation by an enrichment culture of lithotrophic (autotrophic) hydrogen oxidizing methanogenic bacteria at 37 °C. Reported values of the kinetic coeflScients are as follows (1) Y = 0.043 mg volatile suspended solids per mg of hydrogen COD removed, (2) b = —0.009 day"S (3) k = 24.8 mg hydrogen COD removed per mg volatile suspended solids per day and (4) Ks = 569 mm of mercury, hydrogen pressure. 

Shea s study is of particular interest in light of the postulate (14) that the fermentation to methane of propionic, butyric, and long chain fatty acids may involve hydrogen oxidizing methanogenic bacteria. If this is true, the limiting reactions in the enrichment studies by Lawrence and McCarty (2) (propionate and butyrate) and O Rourke (3) may have... 

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