Anaerobic digestion fermentation

Anaerobic digestion Fermentation Metaboiic processing Gasification High-pressure aaueous Pyroiysis... 

Fig. 4. Microbial phases in anaerobic digestion A, hydrolysis B, acidification C, methane fermentation.

Sludge Stabilization. Organic sludges need to be stabilized before ultimate disposal except in the case of incineration. This is usually achieved by either aerobic or anaerobic digestion. In aerobic digestion, the degradable volatile soHds are Hquefted and oxidized to CO2 and H2O. In anaerobic digestion the soHds are Hquefted and fermented to CH and CO2. 

Biofuel generation from sweet sorghum Fermentative hydrogen production and anaerobic digestion of the remaining biomass. Biores. Technol. 99 (1), 110-119. 

The formation of hydrogen is accompanied with VFAs or solvent production during an anaerobic digestion process. Therefore, the distribution of VFA concentrations and their finctions is a usefiil indicator for monitoring hydrogen production. Fig. 3 shows the variations in alcohol and VFAs. Most of the VFAs were analyzed as acetate and butyrate, and most of the alcohols were analyzed as ethanol. The propionate concentration was below the analytical limit. It indicates that the anaerobic pathway in the reactor is not propionic-type fermentation but but5nrate-type fermentation. Clostridium butyricum is considered to be the dominant... 

Anaerobic fermentation (in the absence of air) is less common, for instance anaerobic digestion of organic wastes is practiced to make methane. 

Biochemical conversion, or bioconversion, is a chemical reaction caused by treating moist biomass with microorganisms such as enzymes or fungi. The end products may be liquid or gaseous fuels. Anaerobic digestion and fermentation are the two processes used for biochemically... 

The bio-gas project in Emilia-Romagna (Italy) first results of five full scale plants Farm experiments of anaerobic digestion to control odours from slurry Use of methanogenic fermentation to upgrade farm animal and slaughterhouse wastes Latest chemical slurry handling methods... 

The anaerobic digestion (AD) process is a pilot-scale up-flow fixed bed reactor made of a circular column of 3.5 m height, 0.6 m diameter and an originally useful volume of 0.984 m Cf. Figure 8). It performs the biological anaerobic fermentation of distillery wastewater, transforming organic carbon into methane and carbon dioxide. 

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