Methane and Hydrogen Production from Cotton Wastes in Dark Fermentation Process Under Anaerobic and Microaerobic Conditions

Sołowski, Gaweł; Konkol, Izabela; Cenian, Adam

doi:10.1007/978-3-030-13068-8_71

Cited by 2 publications

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“…The observed at 40 °C hydrogen yields per day were higher than those reported by Li et al [18]. The hydrogen production measured here was 6 times higher than in [49]. On the other hand biomass conversion is low (2.6%), 0.9% lower than in production of methane from cotton waste at 43 °C-see e.g.…”

Section: Discussion Of Resultscontrasting

confidence: 65%

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Rapid hydrogen generation from cotton wastes by mean of dark fermentation

et al. 2020

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Dark fermentation of textile wastes is discussed in the paper. In the experiment cotton wastes were fermented. Before fermentation the cotton was hydrolyzed using 0.1 M HCl acidic solution. The inoculum was pretreated by means of heat shock for 0.5 h at 105 °C. The fermentation was carried out under mesophilic conditions at a load of 5 g VSS/L, and pH 5. Oxygen was added in small quantities during fermentation. The oxygen flow rates (OFR) were between 0.3 and 1.0 mL/h. The fermentation was carried out for a few days at temperatures between 40 and 43 °C. Hydrogenesis prevailed at the lower temperature (40 °C) and methanogenesis at the higher (43 °C). Conversion of cotton waste to methane (3.4%) was slightly higher than conversion to hydrogen (2.6%). The highest hydrogen production was obtained for OFR 0.8 mL/h and the percentage of hydrogen in biogas was 43%. At higher temperatures (43 °C) no hydrogen production was observed

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Section: Discussion Of Resultscontrasting

confidence: 65%

“…The presented results showed that fermentation process (after heat shock pretreatment of inoculum) led to higher hydrogen production than in [42] (and no methane generation) at the lower temperature 40 °C. Actually at 43 °C hydrogen was not generated in significant amount and methane at concentration below 2% of biogas.…”

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confidence: 80%

Rapid hydrogen generation from cotton wastes by mean of dark fermentation

et al. 2020

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“…Thus, checking the appearance of this compound in dark fermentation is important before viable industrialization [6]. Another aim of the research was monitoring the relationship between hydrogen and hydrogen sulphide [7], observed in the fermentation of cotton wastes [8]. Among investigations aims, there were tested optimal load for the process also.…”

Section: Introductionmentioning

confidence: 99%

Microbial Biogas Production From Pork Gelatine.

Sołowski

2021

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Dark fermentation of collagen (gelatine) results are shown in this research. The concentrations of applied gelatine were of VSS (volatile suspended solids) from 10 g VSS/L to 30 g VSS/L. The initial process pH was 5.5, depending on concentration reached pH values from 7.5 to 7.8 after 55 days. Although inoculum was heat-shocked in the case of 30 g VSS/L of collagen the process was hydrogenotrophic anaerobic digestion. In collagen concentration below 30 g VSS/L, hydrogen production was dominant only in the first 5 days of experiments. Then there also changed from dark fermentation into hydrogenotrophic methane production. In the case of optimal biogas production was due to accumulative production for a concentration of collagen 20 g VSS/L: 147.2 mL of hydrogen and 57.23 L of methane. In the case of optimal biogas production was due to accumulative production for a concentration of collagen 20 g VSS/L: 147.2 mL of hydrogen and 57.23 L of methane. The optimal hydrogen and methane yields were for concentration 10 g VSS/L (7.65 mL H2 /g VSS, and 3.49 L CH4/ g VSS). In 10 g VSS/L was also the lowest accumulated emission of hydrogen sulphide (10.3 mL of H2S), while the lowest yield was for 30 g VSS/L (0.44 mL H2S /g VSS). After a lag time, the hydrogen production and hydrogen sulphide grew with a specific ratio depending on concentration. Collagen, a protein with known amounts of sulphur allowed determining the origin of hydrogen sulphide in biogas. The hydrogen sulphide emission and sulphur added analysis proved that hydrogen sulphide origins in biogas from bacteria remains more than from substrate.

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Methane and Hydrogen Production from Cotton Wastes in Dark Fermentation Process Under Anaerobic and Microaerobic Conditions

Cited by 2 publications

References 3 publications

Rapid hydrogen generation from cotton wastes by mean of dark fermentation

Rapid hydrogen generation from cotton wastes by mean of dark fermentation

Microbial Biogas Production From Pork Gelatine.

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