Enhanced Production of Biogas Using Biochar–Sulfur Composite in the Methane Fermentation Process

Syguła, Ewa; Gałęzowska, Michalina; Białowiec, Andrzej

doi:10.3390/ma15134517

Cited by 4 publications

(3 citation statements)

References 25 publications

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“…In extreme cases, overproduction by one group may inhibit the functioning of others, leading to AD process inhibition or collapse. BC, due to its porous structure and the presence of some essential functional groups, can absorb and immobilize excess ammonia, heavy metals, and toxins (Syguła et al, 2022). Porous structure also promotes microorganism growth on the BC surface.…”

Section: Introductionmentioning

confidence: 99%

Anaerobic digestion of brewer’s spent grain with biochars—biomethane production and digestate quality effects

2023

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In this research, biochar (BC) made from the brewer’s spent grain at temperatures of 300, 450, and 600 °C was produced and subjected to the anaerobic digestion of the brewer’s spent grain. BC shares of 2, 5, 10, and 50% concerning total solids of the substrate were tested at three substrate-to-inoculum ratios of 0.5, 1.0, and 2.0, respectively. The anaerobic digestion process was performed at 37 °C and took 30 days. For anaerobic digestion, biomethane production was recorded and used for kinetics parameter determination according to the first-order model. After the process, process residues (digestate) were analyzed for fertilizing potential. The biomethane yield differs from 264 to 325 mL×gvs−1, while kinetics parameters were 292.7–344.7 mL×gvs−1, 0.08–0.11 d−1, and 24–42.5 mL×(gvs×d)−1, for ymax, k, and r, respectively. The main factors affecting biomethane production were substrate-to-inoculum ratio and BC share. No specific effect between BC types on biomethane yield was found. An increase in BC share from 2% to 50% concerning specific SIR results in biomethane production improvement in the range of 1.8% to 10%. The main factors affecting the quality of digestate (nutrients) were the quality of the used inoculum and the quantity of the used substrate. The research results were complex and showed that the final effect of BC supplementation depends not only on BC properties, but also on process operational parameters and the quality of the used feedstock.

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Section: Introductionmentioning

confidence: 99%

Anaerobic digestion of brewer’s spent grain with biochars—biomethane production and digestate quality effects

2023

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“…The current geopolitical situation is forcing a reconstruction of the existing model of global energy production. Conventional fuels are being replaced by alternative energy sources over time, but their share is still low [7]. The main reason for the slow energy transition is the failure to adapt the existing energy infrastructure to the use of alternative fuels.…”

Section: Introductionmentioning

confidence: 99%

Effects of Iron, Lime, and Porous Ceramic Powder Additives on Methane Production from Brewer’s Spent Grain in the Anaerobic Digestion Process

2023

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The process of anaerobic digestion used for methane production can be enhanced by dosing various additive materials. The effects of these materials are dependent on various factors, including the processed substrate, process conditions, and the type and amount of the additive material. As part of the study, three different materials—iron powder, lime, and milled porous ceramic—were added to the 30-day anaerobic digestion of the brewer’s spent grain to improve its performance. Different doses ranging from 0.2 to 2.3 gTS × L−1 were tested, and methane production kinetics were determined using the first-order model. The results showed that the methane yield ranged from 281.4 ± 8.0 to 326.1 ± 9.3 mL × gVS−1, while substrate biodegradation ranged from 56.0 ± 1.6 to 68.1 ± 0.7%. The addition of lime reduced the methane yield at almost all doses by −6.7% to −3.3%, while the addition of iron powder increased the methane yield from 0.8% to 9.8%. The addition of ceramic powder resulted in a methane yield change ranging from −2.6% to 4.6%. These findings suggest that the use of additive materials should be approached with caution, as even slight changes in the amount used can impact methane production.

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“…Nevertheless, the effect of biochar supplementation depends on biochar properties, amounts of added BC, and AD characteristics. Due to the abundance of possible AD substrates and BCs properties, there is a need for more research on biochar addition to the AD process to find the right biochar properties and their amounts (Syguła et al, 2022). Biochar properties significantly depend on the substrate used in the pyrolysis process and pyrolysis conditions (temperature, residence time, heating rate, etc.).…”

Section: Introductionmentioning

confidence: 99%

Anaerobic Digestion of Brewer’s Spent Grain With Biochar – Biogas Production Kinetics and Process Efficiency

et al. 2023

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Biochars made from brewer’s spent grain were added to the anaerobic digestion of brewer’s spent grain to enhance the methane fermentation process and improve biogas production. In research, the effect of biochars made at 300, 450, and 600 °C and doses of 1-8% added to anaerobic digestion was tested. The biochemical biogas potential tests in mesophilic conditions were performed. The tests took 28 days, the biogas yield for each reactor varied from 500-650 ml×gVS-1, and around 60% substrate degradation was obtained. For each test, the kinetics parameters using the first-order model were determined. The constant biogas production rate (k), and the biogas production rate (r) varied from 0.05-0.08 d−1, and 42-60 ml×(gVS×d)−1 respectively. Though the differences in biogas production turned out to be statistically insignificant (p<0.05) due to the high disappearance in obtained data and conflicting effects, the response surface area analysis showed that biochar made at 450 °C at the share of 1-4% could be used to maximize biogas production. Nevertheless, supplementation with biochar needs to be done carefully since in many cases, a reduction in biogas production was observed

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Enhanced Production of Biogas Using Biochar–Sulfur Composite in the Methane Fermentation Process

Cited by 4 publications

References 25 publications

Anaerobic digestion of brewer’s spent grain with biochars—biomethane production and digestate quality effects

Anaerobic digestion of brewer’s spent grain with biochars—biomethane production and digestate quality effects

Effects of Iron, Lime, and Porous Ceramic Powder Additives on Methane Production from Brewer’s Spent Grain in the Anaerobic Digestion Process

Anaerobic Digestion of Brewer’s Spent Grain With Biochar – Biogas Production Kinetics and Process Efficiency

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