Modified process and bioreactor for cyanocobalamine (vitamin В12) and biomethane production
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2022-04-19 11:33
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COVALIOV, Victor, COVALIOVA, Olga. Modified process and bioreactor for cyanocobalamine (vitamin В12) and biomethane production. In: Ecological and environmental chemistry : - 2017, Ed. 6, 2-3 martie 2017, Chișinău. Chisinau, Republic of Moldova: Academy of Sciences of Moldova, 2017, Ediția 6, p. 148.
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Ecological and environmental chemistry
Ediția 6, 2017
Conferința "Ecological and environmental chemistry 2017"
6, Chișinău, Moldova, 2-3 martie 2017

Modified process and bioreactor for cyanocobalamine (vitamin В12) and biomethane production


Pag. 148-148

Covaliov Victor1, Covaliova Olga2
 
1 Moldova State University,
2 Institute of Chemistry of the Academy of Sciences of Moldova
 
 
Disponibil în IBN: 13 martie 2019


Rezumat

A novel strategic approach is discussed towards the intensification of methanogenic process to produce the high-caloricity biogas and enhanced yield of vitamin В12. It involves the integrated solutions envisaging the combination of new technologies and modified bioreactor design. The complex scheme was elaborated of anaerobic treatment intensification of alcohol vinasse in order to enhance the biogas yield and obtain the vitaminized forage additive. The scheme implies the combination of technological processes with adding of phyto-catalysts and auxiliary components [1]. The mechanism of methanogenesis processes is considered, including four main stages. The first and the second one include the hydrolytic disintegration of complex organic molecules for the simpler compounds – lower acids and alcohols, ammonia, hydrogen sulphide, etc. On the third, acetogenic stage, the microbiological splitting processes occur of alcohols and fatty acids with the formation of Н2, СО2, formiate, acetate. 80 % of hydrogen thus emitting on the acetogenic stage is formed from water and 20 % of hydrogen - from the organic components. A series of reactions occur on the fourth stage of complex enough biochemical process, when the disintegrated components, such as Н2 and СО2, are transformed into the biomethane with the involvement of microorganisms’ symbiosis, following the general type reaction: СО2 + 2Н2 → СН4 + 2О*. The certain role in the formation of protonated or molecular hydrogen is played in the biochemical process by dehydrogenase (enzyme), which catalyses the hydrogen detachment reactions from one type of organic substrate and its transfer towards the another one. Under the real conditions, the methane yield in biogas composition makes 55-65 %, the rest being СО2 and insignificant admixtures of СО and Н2S, which decrease the biogas caloricity. Therefore, we have studied the possibility to rise the СН4 contents and accordingly, to minimize СО2 amount in biogas composition. Two ways were studied which have shown the positive results. The first one includes application of type new natural compounds with phyto-catalytic properties which made it possible to rise СН4 contents up to 88-92%, intensifying essentially, at the same time, the methanogenesis process. The second way implies the dosing of electrolytic hydrogen into the biochemical process, which made it possible to bind the remaining СО2 amounts during the methanogenic process and transform it in СН4. This approach is based on our previous works and ensure the low power consumption for electrolysis and increased current yield for hydrogen. The integrated approach towards to the resolving of this problem permitted, due to the adding of microadditives containing cobalt and ferro-cuanide complex, to produce, along with biomethane, cobalamine as well. 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