Mesophilic conventional

Sekiguchi, Y. Kamagata, Y. Ohashi, A. Harada, H. Molecular and conventional analyses of microbial diversity in mesophilic and thermophilic upflow anaerobic sludge blanket granular sludges. Water Sci. Technol. 2002, 45, 19-25. 

Thermophilic Anaerobic Reactor Applications. Pulp and paper industries typically discharge warm (50°C) effluents, and conventional reactors operating under mesophilic conditions require cooling of such wastewaters. Attempts have been made periodically by various groups to investigate the possibility of applying thermophilic anaerobic processes to pulp and paper discharges, but to date there is no conclusive evidence to prove the superior performances of thermophilic reactors as compared to their mesophilic counterparts. 

Direct acidification with HCl or in situ production of lactic acid by a mesophilic lactic starter still dominate in the production of acid casein. A relatively recent development in the production of acid casein is the use of ion exchangers for acidification. In one such method, a portion of the milk is acidified to approximately pH 2 at 10°C by treatment with a strong acid ion exchanger and then mixed with unacidified milk in proportions so that the mixture has a pH of 4.6. The acidified milk is then processed by conventional techniques. A yield increase of about 3,5% is claimed, apparently due to the precipitation of some proteose-peptones. The resulting whey has a lower salt content than normal and is thus more suitable for further processing. The elimination of strong acid reduces the risk of corrosion by the chloride ion (Cl ) and hence cheaper equipment may be... 

Steady-state performance of conventional high-rate mesophilic digestion of the biomass-waste blend at the baseline loading and detention time is presented in Table I. The methane yields from replicate baseline runs ranged... 

Examination of metabolic pathways in extreme thermophiles has provided interesting insights into the necessary adaptations for life at high temperatures and possible explanations for the mechanisms used by early life. These pathways include enzymes not found in mesophiles and that can perform unique reactions which often bypass steps found in conventional pathways characterized in mesophilic organisms (e.g., [33]). These shortened metabolic pathways presumably compensate for changes in equilibrium or instability of intermediates at higher temperatures. Thus, these shortcuts may be of some use in construction of synthetic metabolic pathways. 

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