[Treatment of wastewaters of [bakers'] yeasts plants]
2000
Karanov, Yu. | Koshel, M. | Dobrylovsky, B. | Bashmakova, S. (Ukrainian Research Inst. of Alcohol and Bioproducts, Kyiv (Ukraine))
An issue is considered of the ecological treatment of yeast plants' wastewaters involving the most modern and economically profitable technologies developed by the Ukrainian Research Inst. of Alcohol and Bioproducts (Kyiv). The technologies is based on treating the yeast plants wastewaters with the aid of the anaerobic bioreactor comprising the granular silt and biotanks with microorganisms immobilized on a fibrous carrier. As a result of the desintegrating the organic substance the biogas is obtained with the methan content 65-75 %. It is used as a biofuel in gas boilers, internal combustion engines of means of transportation and at power energy production. It is stated that while burning a cubic metre of the gas the amount of energy produced is equivalent to 1.6-2.0 kW of the electric power, or the amount of heat released when burning 0.7 cubic metres of natural gas, 0.65 l of disel fuel, 0.75 l of oil with the octane number 76-80. It is stressed that the treatment facilities when loaded by the active silt achieve a regulated operational mode for 10-16 days. The technology proposed has the advantages as follows: the fast start up and a possibility of long-lasting shutdowns; a decrease in the air consumption by 30 %; high treatment stability at fluctuations of pollution concentrations in the wastewaters; the minimum of the equipment required and sipmplicity of its maintenance; the absence of liqid wastes; peak loads resistance; compactness and a possibility to locate the treatment facilities at the territory of a bakers' yeast plant. The conclusions are drawn that the technology developed can be introduced at bakers' yeast plants in Ukraine and other CIS countries
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