Production of hydrogen and methane from organic solid wastes by phase-separation of anaerobic process

Biological hydrogen production from sterilized sewage sludge by anaerobic self-fermentation

“…Therefore, the high acetate content of VFA might be caused by the fact that the substances of hydrogenproducing microorganisms were complicated and the compositions of VFA were affected by the hydrogen-producing ones. By the way, after self-fermentation, the fermented sludge could be used to produce methane by anaerobic fermentation or hydrogen by photosynthesis fermentation and there are many such studies [8,33,34]. …”

Optimization of Key Factors Affecting Methane Production from Acidic Effluent Coming from the Sugarcane Juice Hydrogen Fermentation Process

“…The recovery of biogas as well as a reduction of chemical oxygen demand (COD) in organic waste and waste stabilization are the main advantages of this process [1]. A two-stage anaerobic digestion process for producing hydrogen and methane from organic materials has been reported [2][3][4][5][6][7]. In the first stage, acidogenic bacteria convert the organic substances to hydrogen, carbon dioxide and volatile fatty acids (VFAs).…”

Hydrogen Fermentation of Cow Manure Mixed with Food Waste

“…Dog food has been frequently used as a typical artificial food waste containing solid organic matter 13 . As compared to the one-step treatment (methane fermentation only), the two-step treatment continuously produced higher amounts of methane, except on days 6 and 9.…”

“…Therefore, a two-step treatment (hydrogen fermentation followed by methane fermentation) of organic waste has been proposed 6 . To date, two-step treatments of organic wastes such as food waste 2 , household solid waste 4 and organic solid waste containing paper 12,13 have been reported. Hydrogen fermentation of organic wastes, other than livestock manures, requires the addition of hydrogen-producing bacteria.…”