Application of Bioactive Substances in the Biogas Technology

Cristea, Victor; Malina, Joseph F.; Duca, Gheorghe; Covaliova, Olga; Valentin, Bobeică

doi:10.1007/978-3-319-02708-1_12

Cited by 3 publications

(3 citation statements)

References 3 publications

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“…1) thus, essentially improving the efficacy of the process of phytostimulation of methanogenic fermentation. The data obtained and presented in the table 1 regarding the synergetic effect of stimulation of the anaerobic fermentation by the preparation BISTIM II-CH4 based on the optimal ratio combination of squalene and betulinol are compliant with the preliminary data obtained for chemical compounds applied in their pure form [5]. The later ones induce an increase of the content of biomethane in the biogas up to 93.3% in the case of the most effective concentration of the preparation (5 .…”

Section: Figure1 Phytochemical Compounds That Stimulate the Methanogsupporting

confidence: 71%

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Phytochemical Compounds and Plant Products That Stimulate Methanogenic Processes of Anaerobic Fermentation by Microorganisms

Valentin¹,

Cristea²,

Nenno³

et al. 2015

Simi 2015

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SummaryFor the first time, phytochemical stimulants that intensify the process of fermentation and increase the methane content in the produced biogas were applied in the technology of obtaining biogas through anaerobic fermentation. The residual marc obtained from distillation of bio-alcohol from nonstandardized raw-materials has served as experimental substrate. A series of substances consisting of various derivatives of phytochemical compounds such as flavonoids, tannins, mono-, di and triterpenoids, sterols, triterpene-and sterol-saponins, carotenoids that manifested themselves as more active stimulants of methane production than the diterpenoid sclareol, or triterpenoids squalene and betulinol, all from the terpenic compounds group were tested experimentally. The laboratory experiments that were performed have applied these three compounds to the anaerobic fermentation environment in concentrations varying between 10 -5 -10 -3 % by mass of substrate, which demonstrated an increase of the ratio of fermentation up to 2-3 times and an increase of the methane content from 50-60 up to 80%. Monoterpenoids, while applied in same quantities, have manifested a reduced intensification of anaerobe fermentation. The investigated flavonoids, tannins and saponins applied in similar conditions of testing have caused the reduction of the content of methane in biogas emissions.

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Section: Figure1 Phytochemical Compounds That Stimulate the Methanogsupporting

confidence: 71%

“…The specific amount of biogas, m 3 / day per m 3 of reactor CH4 content in biogas , vol, % Further investigations were focused on two compounds that in previous investigations were the most active promoters of methanogenic fermentation, and namely -squalene and betulinol [5] .…”

Section: Figure1 Phytochemical Compounds That Stimulate the Methanogmentioning

confidence: 99%

Phytochemical Compounds and Plant Products That Stimulate Methanogenic Processes of Anaerobic Fermentation by Microorganisms

Valentin¹,

Cristea²,

Nenno³

et al. 2015

Simi 2015

Self Cite

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“…Digestia anaerobă și fermentația sunt cele mai populare procese, având ca rezultat producerea de biogaz care conține în principal biometan, dioxid de carbon și, în cantități mai mici, biohidrogen, hidrogen sulfurat [43]. În funcție de condițiile biochimice de digestie, poate fi produs biogazul cu conținut ridicat de metan [44][45][46], hidrogen [47,48] în condiții anoxice, sau sub presiune ridicată [49][50] sau folosind alte abordări, cum ar fi adăugarea de compuși bioactive care accelerează digestia biochimică și fac posibilă obținerea de cantități mult mai mari de biometan de biohidrogen pe timp mai scurt [51][52][53][54][55][56][57][58]. Biogazul poate fi ars pentru a produce căldură, ori poate fi convertit în energie și căldură, folosind dispozitivele de cogenerare [59][60][61].…”

Section: Introducereunclassified

Study of the redox processes in biochemical systems in the presence of antioxidants

Duca,

Covaliov,

Covaliova

et al. 2023

Redox Processes With Electron and Proton Transfer

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Waste from the agro-industrial sector, due to its toxic effects on plants and living organisms, cannot be thrown into the ground. At the same time, they can also serve as a renewable source of value-added products, which can be obtained following specific biochemical treatment. This research focused on studies of biomass fermentation processes in the presence of bioactive substances introduced directly into the digested biomass. The study of the effects of bioactive substances with possible antioxidant properties on the biomass of the wine sector with the identification of the mechanisms of these processes represents a direction of perspective, suggesting new ways of valorizing waste. The obtained results show that the biologically active substances of natural origin used as additives in the vinasse digestion process demonstrate pronounced effects on the alcoholic fermentation of vinasse under mesophilic conditions. The comparative evaluation of the action of different additions in the studied processes demonstrated that dihydroxyfumaric acid determined the emission of 266 cm3 CO2 in 76 hours, aescinum – 251 cm3 in 55 hours, tomatine – 233 cm3 in 78 hours, sclareol – 232 cm3 in 55 hours. hours, vanillin – 229 cm3 during 69 hours, while catechin – 180 cm3 during 61 hours of fermentation, until the fermentation process is completed. It was shown that the addition of complex compounds and Co(III) allows obtaining cobalamin (vitamin B12) in the semi-solid fraction formed after fermentation. As a result of the treatment, CCOCr and CBO5 values were reduced by 96.6-97.8%. Also, two preparations were developed for the treatment of organic waste: one for removing the unpleasant smell of semi-solid sludge resulting from municipal wastewater treatment, by inhibiting the development of thiol substances formed as a result of the vital action of microorganisms from the digestate formed, and the other the second preparation - for deworming stabilized sewage treatment sludge using juglon. Both technological processes can be recommended for practical application.

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Modification of Waste Biomass Digestion in the Presence of Additives of Bioactive Substances

Duca,

Sturza,

Covaliova

et al. 2023

Environmental and Technological Aspects of Redox Processes

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Waste management in the agro-industrial sector is an important issue as it offers ways to prevent the toxic discharges of harmful pollutants into the environment, and at the same time to obtain a series of value-added products. Liquid organic wastes from the agro-industrial sector are usually in the state of continuing digestion and are capable of rendering toxic effects on plants and living organisms. Conventional technologies require a lot of treatment time and large volumes of reservoirs. The aim of this research was to intensify anaerobic fermentation using the additives of bioactive substances introduced directly into the digested biomass. The results obtained testify that substances of natural origin used as additives demonstrate pronounced effects on the alcoholic fermentation of vinasse under mesophilic conditions. The comparative assessment of different additives' action in the studied processes has demonstrated that dihydrofumaric acid caused the emission of 266 cm3 CO2 during 76 hours, aescinum – 251 cm3 during 55 hours, tomatin – 233 cm3 during 78 hours of fermentation.

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Application of Bioactive Substances in the Biogas Technology

Cited by 3 publications

References 3 publications

Phytochemical Compounds and Plant Products That Stimulate Methanogenic Processes of Anaerobic Fermentation by Microorganisms

Phytochemical Compounds and Plant Products That Stimulate Methanogenic Processes of Anaerobic Fermentation by Microorganisms

Study of the redox processes in biochemical systems in the presence of antioxidants

Modification of Waste Biomass Digestion in the Presence of Additives of Bioactive Substances

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