Innovative additives for chemical desulphurisation in biogas processes: A comparative study on iron compound products

Nägele, Hans‐Joachim; Steinbrenner, Jörg; Hermanns, Gislaine; Holstein, V.; Haag, Nicola Leonard; Oechsner, Hans

doi:10.1016/j.bej.2017.01.006

Cited by 15 publications

(8 citation statements)

References 9 publications

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“…While the daily feeding was stable, the slightly high VOA/TIC did not lead to high fluctuations in biogas production during the monitoring. All the other DE and CN BGPs had a VOA/TIC ratio less than 0.3, indicating that the anaerobic digestion process was stable [45][46][47].…”

Section: Voa/tic Ratiomentioning

confidence: 99%

Operating Performance of Full-Scale Agricultural Biogas Plants in Germany and China: Results of a Year-Round Monitoring Program

et al. 2021

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Germany (DE) and China (CN) have different political approaches in supporting the biogas sector. Three German and three Chinese large-scale biogas plants (BGPs) were evaluated as part of a year-round monitoring program. Laboratory methods were utilized to analyze the chemical indicators. Results showed a stable anaerobic digestion process without system failures in all BGPs. The methane yield had a range of 0.23–0.35 m3CH4/kgODM for DE BGPs and 0.11–0.22 m3CH4/kgODM for CN BGPs, due to different substrates and working temperatures. Financial analyses indicated that DE BGPs are viable under their current feed-in tariffs contracts. Their financial internal rate of return (IRR) ranged between 8 and 22%. However, all CN BGPs had negative IRRs, indicating that they are financially unfeasible. Risk analyses illustrated that DE BGPs will face financial nonviability if benefits decrease by 9–33% or costs increase by 10–49%, or if a combined worse case (benefit decrease and cost increase) of 5–20% occurs. Incentives to BGP operations are particularly important in China, where the government should consider switching the construction-based subsidy to a performance-based subsidy system to motivate the operators. BGP monitoring is necessary to understand the performance, in addition to briefing policymakers in case a policy reform is needed.

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Section: Voa/tic Ratiomentioning

confidence: 99%

Operating Performance of Full-Scale Agricultural Biogas Plants in Germany and China: Results of a Year-Round Monitoring Program

et al. 2021

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“…As a result, desulfurization of biogas for concentrations of H 2 S higher than 1000 ppm is recommended. On the other hand, removing sulfur into the digestate is beneficial, since digestate rich in sulfate is considered a valuable fertilizer [13].…”

Section: Desulfurizationmentioning

confidence: 99%

“…The reason for this change was the lower cost of FeCl 2 . It was expected that this change would also benefit the sulfur removal, since Fe(OH) 3 is considered relatively unstable [13]. Moreover, ferrous iron seems to react faster than ferric iron, since ferric iron first must undergo a reduction to ferrous iron before sulfide precipitation occurs [37].…”

Section: Desulfurizationmentioning

confidence: 99%

Performance of a Full-Scale Biogas Plant Operation in Greece and Its Impact on the Circular Economy

Spyridonidis

Vasiliadou

Akratos

et al. 2020

Water

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Biogas plants have been started to expand recently in Greece and their positive contribution to the economy is evident. A typical case study is presented which focuses on the long-term monitoring (lasting for one year) of a 500 kW mesophilic biogas plant consisting of an one-stage digester. The main feedstock used was cow manure, supplemented occasionally with chicken manure, corn silage, wheat/ray silage, glycerine, cheese whey, molasses and olive mill wastewater. The mixture of the feedstocks was adjusted based on their availability, cost and biochemical methane potential. The organic loading rate (OLR) varied at 3.42 ± 0.23 kg COD m−3 day−1 (or 2.74 ± 0.18 kg VS m−3 day−1) and resulted in a stable performance in terms of specific biogas production rate (1.27 ± 0.12 m3 m−3 day−1), biogas yield (0.46 ± 0.05 m3 kg−1 VS, 55 ± 1.3% in methane) and electricity production rate (12687 ± 1140 kWh day−1). There were no problems of foaming, nor was there a need for trace metal addition. The digestate was used by the neighboring farmers who observed an improvement in their crop yield. The profit estimates per feedstock indicate that chicken manure is superior to the other feedstocks, while molasses, silages and glycerin result in less profit due to the long distance of the biogas plant from their production source. Finally, the greenhouse gas emissions due to the digestate storage in the open air seem to be minor (0.81% of the methane consumed).

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“…The in-situ chemical precipitation desulphurisation strategy refers to approaches that are localised within the digester and that can limit the conversion of dissolved sulphides in the digester to H 2 S via their conversion to insolubles within the digester [34,35]. The formation of insolubles is achieved via the dosing of the digester using chemicals that are capable of converting dissolved sulphides to either insoluble metallic sulphide compounds or insoluble elemental sulphur [35,36].…”

Section: In-situ Chemical Precipitationmentioning

confidence: 99%

“…Generally speaking, divalent (Fe 2+ ) and trivalent (Fe 3+ ) iron salts are the most commonly employed chemicals to enable the precipitation of sulphides [37]. These salts include chlorides of Fe 3+ and Fe 2+ , iron (III) oxide-hydroxide (FeOOH), and iron (III) hydroxide (Fe (OH) 3 ) [34,38]. The precipitation of sulphides occurs via reactions as follows [34,38];…”

Section: In-situ Chemical Precipitationmentioning

confidence: 99%

Desulphurisation of Biogas: A Systematic Qualitative and Economic-Based Quantitative Review of Alternative Strategies

Okoro

Sun

2019

ChemEngineering

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The desulphurisation of biogas for hydrogen sulphide (H2S) removal constitutes a significant challenge in the area of biogas research. This is because the retention of H2S in biogas presents negative consequences on human health and equipment durability. The negative impacts are reflective of the potentially fatal and corrosive consequences reported when biogas containing H2S is inhaled and employed as a boiler biofuel, respectively. Recognising the importance of producing H2S-free biogas, this paper explores the current state of research in the area of desulphurisation of biogas. In the present paper, physical–chemical, biological, in-situ, and post-biogas desulphurisation strategies were extensively reviewed as the basis for providing a qualitative comparison of the strategies. Additionally, a review of the costing data combined with an analysis of the inherent data uncertainties due underlying estimation assumptions have also been undertaken to provide a basis for quantitative comparison of the desulphurisation strategies. It is anticipated that the combination of the qualitative and quantitative comparison approaches employed in assessing the desulphurisation strategies reviewed in the present paper will aid in future decisions involving the selection of the preferred biogas desulphurisation strategy to satisfy specific economic and performance-related targets.

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Innovative additives for chemical desulphurisation in biogas processes: A comparative study on iron compound products

Cited by 15 publications

References 9 publications

Operating Performance of Full-Scale Agricultural Biogas Plants in Germany and China: Results of a Year-Round Monitoring Program

Operating Performance of Full-Scale Agricultural Biogas Plants in Germany and China: Results of a Year-Round Monitoring Program

Performance of a Full-Scale Biogas Plant Operation in Greece and Its Impact on the Circular Economy

Desulphurisation of Biogas: A Systematic Qualitative and Economic-Based Quantitative Review of Alternative Strategies

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