A shift from anaerobic digestion to dark fermentation in glycol ethylene fermentation

Sołowski, Gaweł; Zimiński, T.; Cenian, Adam

doi:10.1007/s11356-020-12149-1

Cited by 9 publications

(11 citation statements)

References 38 publications

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“…In the VSS 89% [49], sour cabbage was enough digested -anaerobic digestion bacteria easier convert it into methane. The fluctuations of ratios are bigger than in the case [44]. In every case there is a sudden outburst of hydrogen production on the first day, then replaced with higher hydrogen sulfide production, more than from glycol ethylene digestion.…”

Section: Total Hydrogen Production Vs Total Hydrogen Sulphite Production and General Discussionmentioning

confidence: 80%

“…All of the experiments were carried out, in triplicate, in 12 reactors, the mean values for biogas measurements are reported. The qualitative and quantitative parameters of the collected biogases were determined in one or two stages exactly like in [44]. The calibration of the device was performed twice a week.…”

Section: Methodsmentioning

confidence: 99%

“…In sour cabbage, there is little proteins [57] on the level of agar plates [43]. The presence of hydrogen sulfide shows, that proteins are also decomposed [44]. Therefore, biogas analysis requires checking of presence of gas different from carbon dioxide, methane, hydrogen, and nitrogen [45].One of the problems of the DF is the selection of material from waste to produce hydrogen [46].…”

Section: Introductionmentioning

confidence: 99%

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Analysis of Biogas Component Production during Anaerobic Digestion of Sour Cabbage in Microaeration Conditions under Different pH Conditions

Sołowski¹

2021

Preprint

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In the article, were checked influences of microaeration, pH, and VSS (Volatile Suspended Solid) for sour cab-bage anaerobic digestion. Results fermentation of sour cabbage under the condition of small oxygen addition are presented in this research can be classified as dark fermentation or hydrogenotrophic anaerobic digestion. The investigations were carried out for two concentrations 5 g VSS /L and 10 g VSS /L of sour cabbage at pH 6.0. The oxygen flow rates (OFR) for 5 g VSS /L were in the range of 0.53 to 3.3 mL/h for obtaining 2% to 8% of oxygen. In cases of low pH and microaeration, ethylene production was observed at a level below 0.05% in biogas. The highest volume of hydrogen for 5 g VSS/L was obtained for flow rate 0.58 O2 mL/h, giving hydrogen concentration in biogas in the range of 0 to 20%. For VSS 5 g/L and oxygen flow rate 0.58 mL/h; 0.021 L of hydrogen is produced per gram of VSS. In this case, VSS 10 g/L and oxygen flow rate 1.4 mL/h at pH 6.0, 0.03 L of hydrogen is generated per gram. Microaeration from 0.58 mL/h to 0.87 mL/h was propitious for hydrogen production at 5 g VSS/L of sour cabbage and 1.4 mL/h for 10 g/L. Another relevant factor is the volatile suspended solid factor of sour cabbage that caused optimal hydrogen production at VSS 89.32%.

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Section: Total Hydrogen Production Vs Total Hydrogen Sulphite Production and General Discussionmentioning

confidence: 80%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Analysis of Biogas Component Production during Anaerobic Digestion of Sour Cabbage in Microaeration Conditions under Different pH Conditions

Sołowski¹

2021

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“…In the semi-batch, 5 g VSS/L of sour cabbage or glucose was added to the inoculum. Every set of experiments was triplicate, the results were mean given are mean values similar to [ 31 ]. After addition, the pH value for the acidic value of the mixture was lowered (using 38% HCl) from 7.9 to 5.0.…”

Section: Methodsmentioning

confidence: 99%

Modelling of dark fermentation of glucose and sour cabbage

Sołowski

Pastuszak

2021

Heliyon

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In the article, modified Anaerobic Digestion Models 1 (ADM-1) was tested for modelling dark fermentation for hydrogen production. The model refitting was done with the Euler method. The new model was based on sets of differential equations. The model was checked for hydrogen production from sour cabbage in batch and semi-batch in 5 g VSS (volatile solid suspension)/L and at the semi-batch process from glucose at 5 and 10 g VSS/L. Added parameters determined the conversion of a substrate, hydrogen production, and stress parameters. In the case of a semi-batch process, for one month, cumulative hydrogen production from sour cabbage of 5 g VSS/L was 0.9 L of cumulative hydrogen volume and from glucose 5 g VSS/L (in case of feeding 2 g VSS/L every two days) 2.5 L of cumulative hydrogen volume. At the bacterial population level, hydrogen production was a continuous process at an adequate range of population size and environmental parameters.

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“…Biogas measurements were carried out every day at the same time with an accuracy of ±0.0001 dm 3 . The qualitative and quantitative assessments of the gases were performed and determined in two stages like it was written in [30].…”

Section: Methodsmentioning

confidence: 99%

Microbial Biogas Production From Pork Gelatine.

Sołowski

2021

Preprint

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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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A shift from anaerobic digestion to dark fermentation in glycol ethylene fermentation

Cited by 9 publications

References 38 publications

Analysis of Biogas Component Production during Anaerobic Digestion of Sour Cabbage in Microaeration Conditions under Different pH Conditions

Analysis of Biogas Component Production during Anaerobic Digestion of Sour Cabbage in Microaeration Conditions under Different pH Conditions

Modelling of dark fermentation of glucose and sour cabbage

Microbial Biogas Production From Pork Gelatine.

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