Anaerobic bacteria hydrogen production

As for anaerobic bacteria, hydrogen production by Clostridium butyricum from alcohol fermentation water waste has been investigated and use of produced hydrogen for fuel battery has been attempted and a maximal electricity of 13 W was obtained. 

SRB, a diverse group of anaerobic bacteria isolated from a variety of environments, use sulfate in the absence of oxygen as the terminal electron acceptor in respiration. During biofilm formation, if the aerobic respiration rate within a biofilm is greater than the oxygen diffusion rate, the metal/biofilm interface can become anaerobic and provide a niche for sulfide production by SRB. The critical thickness of the biofilm required to produce anaerobie conditions depends on the availability of oxygen and the rate of respiration. The corrosion rate of iron and copper alloys in the presence of hydrogen sulfide is accelerated by the formation of iron sulfide minerals that stimulate the cathodic reaction. 

Anaerobic hydrogen production proceeds from photofermentation as well as without the presence of light. Anaerobic bacteria use organic substances as the sole source of electrons and energy, converting them into hydrogen. 

Isothiazoline is a widely used biocide, but it is not effective against anaerobic bacteria. It is deactivated by hydrogen sulfide leaks. Also, do not dose to closed systems (because of the presence of 0.2% copper and 2 to 3% magnesium salts, which are used as product stabilizers and can increase the risk of galvanic corrosion). Additionally, the high pH of closed-loop systems will hydrolyze isothiazoline. Automated feed systems may be useful for dosing isothiazolines due to the severe skin irritant nature of this material. 

Earlier studies have been done by pure cultures of anaerobic bacteria to study the conversion of carbohydrates (such as glucose and starch) to hydrogen gas, e.g., Aspergillus terreus (Emtiazi et al., 2001) and Clostridium (Taguchi et al., 1994). Recently, the considerable attention of research activity on fermentative hydrogen-production has been focused on the conversion of biomass reproducible resources to hydrogen by mixed cultures... 

The excreted end-products of fermentations, including hydrogen gas, can be used by other anaerobic bacteria, and what is known as an anaerobic food chain develops. At the bottom of the food chain are the archaeal methanogens, different species of which convert hydrogen gas, carbon dioxide, or acetate to CH4. The process of methanogenesis from H2 and C02 occurs as follows ... 

Biological Hydrogen Production by Strict Anaerobic Bacteria Fundamentals, Operational Strategies, and Limitations... 

BIOLOGICAL HYDROGEN PRODUCTION BY STRICT ANAEROBIC BACTERIA... 

The potential of biological hydrogen production by strict anaerobic bacteria has generated considerable interest over the past few decades. With renewable... 

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