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SM ISO690:2012 COVALIOV, Victor, BOBEICA, Valentin, NENNO, Vladimir, COVALIOVA, Olga. Phyto-chemical intensification of biomethane and biohydrogen formation as “green energy” agents in the anaerobic digestion of agroindustrial waste waters. In: The International Conference dedicated to the 55th anniversary from the foundation of the Institute of Chemistry of the Academy of Sciences of Moldova, 28-30 mai 2014, Chișinău. Chișinău, Republica Moldova: Institutul de Chimie al AȘM, 2014, p. 152. |
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The International Conference dedicated to the 55th anniversary from the foundation of the Institute of Chemistry of the Academy of Sciences of Moldova 2014 | ||||||
Conferința "The International Conference dedicated to the 55th anniversary from the foundation of the Institute of Chemistry of the Academy of Sciences of Moldova" Chișinău, Moldova, 28-30 mai 2014 | ||||||
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Pag. 152-152 | ||||||
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The problem of biogas formation and using with high contents in mehtane (CH4) and |
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The problem of biogas formation and using with high contents in mehtane (CH4) and |
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<?xml version='1.0' encoding='utf-8'?> <CERIF xmlns='urn:xmlns:org:eurocris:cerif-1.5-1' xsi:schemaLocation='urn:xmlns:org:eurocris:cerif-1.5-1 http://www.eurocris.org/Uploads/Web%20pages/CERIF-1.5/CERIF_1.5_1.xsd' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' release='1.5' date='2012-10-07' sourceDatabase='Output Profile'> <cfResPubl> <cfResPublId>ibn-ResPubl-106270</cfResPublId> <cfResPublDate>2014</cfResPublDate> <cfStartPage>152</cfStartPage> <cfISBN></cfISBN> <cfURI>https://ibn.idsi.md/ro/vizualizare_articol/106270</cfURI> <cfTitle cfLangCode='EN' cfTrans='o'>Phyto-chemical intensification of biomethane and biohydrogen formation as “green energy” agents in the anaerobic digestion of agroindustrial waste waters</cfTitle> <cfAbstr cfLangCode='EN' cfTrans='o'><p>The problem of biogas formation and using with high contents in mehtane (CH4) and<br />hydrogen (H2) as a renewable energy agent is a serious challenge for the experts in various<br />fields, in view to resolve a fundamental ecological-economic component of sustainable<br />development – transition to the renewable energy sources. As it is known, hydrogen emission<br />occurs on the acetogenic phase of the organic matter anaerobic digestion, due to the acetogenic<br />bacteria activity (Methanobacillus omelianskii etc.), splitting the alcohols and greasy acids,<br />which are formed in the hydrocarbons degradation of vegetable matter. The hydrogen emitted is<br />mostly consumed in the methane formation reacton: 4Н2+ СО2 → СН4 + 2Н2О, and is<br />accumulated in biogas. When its quantity exceeds certain concentration (up to 10%) in biogas,<br />the anaerobic fermentation is inhibited. The amount of CH4 in biogas depends on the rate of this<br />Н2 level attaining. This fact is responsible for the technological difficulties in reaching of more<br />than 70% methane in biogas, its amount in most cases being about 60%. The methanogenesis<br />inhibition prevents the further formation of hydrogen.<br />The essence of phyto-chemical intensification of biohydrogen and biomethane formation,<br />presented in this work, consists in the anaerobic fermentation of agro-industrial wastewaters with<br />high contents in digestible organic substances, in the presence of stimulating additives of phytochemical<br />nature. The vinasse resulted from the alcohol distillation from wine material was used<br />as a biomass – a renewable vegetable substrate. The biologically active vegetable substances of<br />isoprenoid nature have been tested as stimulating additives in anaerobic digestion. These<br />substances, being applied in the amounts of 1x10-3- 5x10-4 mass % of a reacting mixture, have<br />either partially inhibited the methane formation, promoting the accumulation of hydrogen in<br />biogas, or have stimulated the methane formation and appropriate increase in methane<br />concentration.<br />Some spirostanolic substances and triterpenic glicozides introduced in the anaerobic<br />digestion mixture, have significantly reoriented the methanogenesis process towards the selective<br />formation of molecular hydrogen. In the presence of mentioned biostimulators, hydrogen<br />contents in the biogas volume on the 12th day of digestion have reached about 40 and 68% for<br />spirostanolic stimulator and triterpenic glicozide, accordingly. The process was shown to be<br />more efficient within the range pH=5.2 ÷7.5 under the mesophylic thermal conditions.<br />The other phyto-chemical compounds of triterpenoid series (squalene, betulinol), being<br />introduced in the agroindustrial waste waters, have intensified the anaerobic digestion in the<br />laboratory tests up to 2-3 times, with the increase in CH4 contents in biogas up to about 90%.<br />Having revealed this phenomena, we have focused our studies on biogas emission intensification<br />as an agent for „green energy” production in the processes of agroindustrial waste waters and<br />liquid wastes purification with the contents in hydrocarbons, through the anaerobic digestion.<br />The further research have been concentrated on three directions: 1. Biochemical<br />formation of hydrogen, 2. Phyto-chemical intensification of biomethane formation and emission,<br />3. Winery waste water treatment through the beneficial ecologic-economical process of the<br />simultaneous formation of biogas with high contents in methane or hydrogen.</p></cfAbstr> <cfResPubl_Class> <cfClassId>eda2d9e9-34c5-11e1-b86c-0800200c9a66</cfClassId> <cfClassSchemeId>759af938-34ae-11e1-b86c-0800200c9a66</cfClassSchemeId> <cfStartDate>2014T24:00:00</cfStartDate> </cfResPubl_Class> <cfResPubl_Class> <cfClassId>e601872f-4b7e-4d88-929f-7df027b226c9</cfClassId> <cfClassSchemeId>40e90e2f-446d-460a-98e5-5dce57550c48</cfClassSchemeId> <cfStartDate>2014T24:00:00</cfStartDate> </cfResPubl_Class> <cfPers_ResPubl> <cfPersId>ibn-person-600</cfPersId> <cfClassId>49815870-1cfe-11e1-8bc2-0800200c9a66</cfClassId> <cfClassSchemeId>b7135ad0-1d00-11e1-8bc2-0800200c9a66</cfClassSchemeId> <cfStartDate>2014T24:00:00</cfStartDate> </cfPers_ResPubl> <cfPers_ResPubl> <cfPersId>ibn-person-653</cfPersId> <cfClassId>49815870-1cfe-11e1-8bc2-0800200c9a66</cfClassId> <cfClassSchemeId>b7135ad0-1d00-11e1-8bc2-0800200c9a66</cfClassSchemeId> <cfStartDate>2014T24:00:00</cfStartDate> </cfPers_ResPubl> <cfPers_ResPubl> <cfPersId>ibn-person-160</cfPersId> <cfClassId>49815870-1cfe-11e1-8bc2-0800200c9a66</cfClassId> <cfClassSchemeId>b7135ad0-1d00-11e1-8bc2-0800200c9a66</cfClassSchemeId> <cfStartDate>2014T24:00:00</cfStartDate> </cfPers_ResPubl> <cfPers_ResPubl> <cfPersId>ibn-person-11159</cfPersId> <cfClassId>49815870-1cfe-11e1-8bc2-0800200c9a66</cfClassId> <cfClassSchemeId>b7135ad0-1d00-11e1-8bc2-0800200c9a66</cfClassSchemeId> <cfStartDate>2014T24:00:00</cfStartDate> </cfPers_ResPubl> </cfResPubl> <cfPers> <cfPersId>ibn-Pers-600</cfPersId> <cfPersName_Pers> <cfPersNameId>ibn-PersName-600-3</cfPersNameId> <cfClassId>55f90543-d631-42eb-8d47-d8d9266cbb26</cfClassId> <cfClassSchemeId>7375609d-cfa6-45ce-a803-75de69abe21f</cfClassSchemeId> <cfStartDate>2014T24:00:00</cfStartDate> <cfFamilyNames>Ковалёв</cfFamilyNames> <cfFirstNames>Виктор</cfFirstNames> </cfPersName_Pers> </cfPers> <cfPers> <cfPersId>ibn-Pers-653</cfPersId> <cfPersName_Pers> <cfPersNameId>ibn-PersName-653-3</cfPersNameId> <cfClassId>55f90543-d631-42eb-8d47-d8d9266cbb26</cfClassId> <cfClassSchemeId>7375609d-cfa6-45ce-a803-75de69abe21f</cfClassSchemeId> <cfStartDate>2014T24:00:00</cfStartDate> <cfFamilyNames>Bobeica</cfFamilyNames> <cfFirstNames>Valentin</cfFirstNames> <cfFamilyNames>Бобейка</cfFamilyNames> <cfFirstNames>Валентин</cfFirstNames> </cfPersName_Pers> </cfPers> <cfPers> <cfPersId>ibn-Pers-160</cfPersId> <cfPersName_Pers> <cfPersNameId>ibn-PersName-160-3</cfPersNameId> <cfClassId>55f90543-d631-42eb-8d47-d8d9266cbb26</cfClassId> <cfClassSchemeId>7375609d-cfa6-45ce-a803-75de69abe21f</cfClassSchemeId> <cfStartDate>2014T24:00:00</cfStartDate> <cfFamilyNames>Ненно</cfFamilyNames> <cfFirstNames>Владимир</cfFirstNames> </cfPersName_Pers> </cfPers> <cfPers> <cfPersId>ibn-Pers-11159</cfPersId> <cfPersName_Pers> <cfPersNameId>ibn-PersName-11159-3</cfPersNameId> <cfClassId>55f90543-d631-42eb-8d47-d8d9266cbb26</cfClassId> <cfClassSchemeId>7375609d-cfa6-45ce-a803-75de69abe21f</cfClassSchemeId> <cfStartDate>2014T24:00:00</cfStartDate> <cfFamilyNames>Ковалёва</cfFamilyNames> <cfFirstNames>Ольга</cfFirstNames> </cfPersName_Pers> </cfPers> </CERIF>