Microaeration through a biomembrane for biogas desulfurization: lab-scale and pilot-scale experiences

Pokorná-Krayzelová, Lucie; Bartacek, Jan; Theuri, Shelmith Nyawira; Gonzalez, Camilo Andres Segura; Procházka, Jindřich; Volcke, Eveline; Jenı́ček, P.

doi:10.1039/c8ew00232k

Cited by 5 publications

(5 citation statements)

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“…This represents that on average about 9% of all the methane produced left the system through the oxygen container. Research carried out by Pokorna-Krayzelova et al [ 23 ] determined methane losses of 3.7% when operating a silicone biomembrane system for sulfide oxidation.…”

Section: Resultsmentioning

confidence: 99%

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Micro-Oxygenation in Upflow Anaerobic Sludge Bed (UASB) Reactors Using a Silicon Membrane for Sulfide Oxidation

et al. 2020

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Sulfide produced by sulphate-reducing bacteria in anaerobic reactors can seriously affect biogas quality. Microaeration has become a reliable way to remove sulfide, by promoting its oxidation. However, limited research is available regarding its application in upflow anaerobic sludge bed (UASB) reactors. In this research, silicon membranes were studied as a mechanism to dose oxygen in USAB reactors. Two configurations were tested: the membrane placed inside the reactor or in an external module. Our results show that the external membrane proved to be a more practical alternative, providing conditions for sulfide oxidation. This led to a reduction in its concentration in the liquid effluent and biogas. External membrane configuration achieved a sulfide conversion rate of 2.4 g-S m2 d−1. Since the membrane was not sulfide-selective, methane losses were observed (about 9%). In addition, excessive oxygen consumption was observed, compared to the stoichiometric requirement. As is the case for many membrane-based systems, membrane area is a key factor determining the correct operation of the system.

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Section: Resultsmentioning

confidence: 99%

“…The modification of commercially available membrane modules may be a simple and affordable way to implement a micro-oxygenation module for sulfide oxidation. For example, Pokorna-Krayzelova et al [ 23 ] used a commercially available microfiltration membrane for biogas desulfurization on a pilot scale, with positive results.…”

Section: Discussionmentioning

confidence: 99%

Micro-Oxygenation in Upflow Anaerobic Sludge Bed (UASB) Reactors Using a Silicon Membrane for Sulfide Oxidation

et al. 2020

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“…In an attempt to overcome the aforementioned challenges associated with in-situ microaeration desulphurisation strategy, recent investigations have explored the possibility of introducing a membrane to separate the biogas from the oxygen supply pipes [91,92]. In the studies presented in Ref.…”

Section: In-situ Microaeration Desulphurisationmentioning

confidence: 99%

“…[91] and Ref. [92], it was demonstrated that it was possible to utilise an internal silicone membrane and a polyvinylidene fluoride membrane to prevent the clogging problems while maintaining high sulphide removal efficiency of 96% and 99.99%, respectively. These challenges may also be limited by the utilisation of a compartment, distinct from the anaerobic digestion vessel, where the microaeration process for H 2 S oxidation is taking place [93].…”

Section: In-situ Microaeration Desulphurisationmentioning

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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“…In the last few years, many new materials (i.e. silicone, CH 4 -type zeolite and polydimethylsiloxane) for membranes were developed (Maghsoudi & Soltanieh, 2014;Pokorna-Krayzelova et al, 2018a;Tilahun et al, 2018) and their prices decreased rapidly. Recently, a high silica -CH 4 -type zeolite membrane was used for the simultaneous removal of CO 2 and H 2 S (Maghsoudi & Soltanieh, 2014).…”

Section: Membrane Separationmentioning

confidence: 99%

Biological H₂S removal from gases

Andreides¹,

Pokorná-Krayzelová²,

Bartáček³

et al. 2020

Environmental Technologies to Treat Sulphur Pollution: Principles and Engineering

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Hydrogen sulfide (H 2 S) is an odorous and poisonous gas present in biogas (the main product of anaerobic digestion), in sour gas (i.e. natural gas with a high content of H 2 S) or in general in the gases coming as a concomitant with crude oil extraction. H 2 S can also be produced abiotically, e.g. through the reaction of anhydrite and hydrocarbons as reported in deep carbonate gas reservoirs (Worden & Smalley, 1996). In environmental engineering applications, H 2 S is most often generated during anaerobic fermentation of substrates containing sulfur compounds. Sulfate-reducing bacteria (SRB) with a respiratory metabolism use sulfate as an electron acceptor while producing sulfide, which is toxic both in its liquid as well as in its gaseous form. Gaseous hydrogen sulfide causes the corrosion of concrete and steel digesters (see Chapter 5) and other equipment such as pipes, burners and combined heat and power (CHP) units, which increases the operational costs since the engine oil is acidified and its replacement interval is significantly shortened. While burning, the acid rain precursors SO 2 and SO 3 are emitted to the environment. Last but not the least, gaseous hydrogen sulfide is extremely toxic and causes health risks for the operators of fermenters and sewer maintainers. The olfactory nerve responding to the smell of hydrogen sulfide is paralyzed after a few inhalations of 100-150 ppm,

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Microaeration through a biomembrane for biogas desulfurization: lab-scale and pilot-scale experiences

Abstract: Microaeration through biomembrane; a novel method for biogas desulfurization.

Cited by 5 publications

References 20 publications

Micro-Oxygenation in Upflow Anaerobic Sludge Bed (UASB) Reactors Using a Silicon Membrane for Sulfide Oxidation

Micro-Oxygenation in Upflow Anaerobic Sludge Bed (UASB) Reactors Using a Silicon Membrane for Sulfide Oxidation

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

Biological H₂S removal from gases

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Microaeration through a biomembrane for biogas desulfurization: lab-scale and pilot-scale experiences

Abstract: Microaeration through biomembrane; a novel method for biogas desulfurization.

Cited by 5 publications

References 20 publications

Micro-Oxygenation in Upflow Anaerobic Sludge Bed (UASB) Reactors Using a Silicon Membrane for Sulfide Oxidation

Micro-Oxygenation in Upflow Anaerobic Sludge Bed (UASB) Reactors Using a Silicon Membrane for Sulfide Oxidation

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

Biological H2S removal from gases

Contact Info

Product

Resources

About

Biological H₂S removal from gases