Sulfur-oxidizing bacteria in environmental technology

Pokorná, Dana; Zábranská, J.

doi:10.1016/j.biotechadv.2015.02.007

Cited by 349 publications

(136 citation statements)

References 116 publications

(133 reference statements)

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“…fractions is done based on the elemental sulfur balance as an indirect method for quantification of S 0 acc, while S 0 ss is equivalent to measured S2O3 2− [15]. Concentration of S 0 acc was calculated based on the difference between influent HS − concentration and effluent concentrations of HS − , SO4 2− , and S 0 ss, according to Equation (1). H2S in the headspace was not measured.…”

Section: Reactor Performancementioning

confidence: 99%

“…Their removal is necessary due to their negative environmental and economic impact-i.e., increase of maintenance costs in anaerobic digesters or wastewater treatment plants. Presence of H 2 S can lead to corrosion, human toxicity, and biological process inhibition [1]. It has been reported that concentrations of dissolved HS − in the 100-800 mg/L range can inhibit anaerobic digestion [2].…”

Section: Introductionmentioning

confidence: 99%

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Effects of N/S Molar Ratio on Product Formation in Psychrophilic Autotrophic Biological Removal of Sulfide

Sposób

Bakke

Dinamarca

2017

Water

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Section: Reactor Performancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of N/S Molar Ratio on Product Formation in Psychrophilic Autotrophic Biological Removal of Sulfide

Sposób

Bakke

Dinamarca

2017

Water

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“…In such situations, external methods of H 2 S removal from biogas are recommended, e.g., chemical and physical-chemical precipitation, scrubbing or absorption. However, they are associated with use of some specific chemicals and generation of waste that had to be further processed [17]. Selection of a biogas desulfurization method depends on type of substrate, anaerobic digestion conditions, H 2 S content, and a site location, which is particularly important when using filter beds, which require more surface area.…”

Section: Methods Of Biogas Desulfurizationmentioning

confidence: 99%

“…Contamination of biogas with H 2 S can be controlled at various stages of biogas production, beginning from raw materials, an anaerobic digestion process, and finally biogas desulfurization [15]. The biogas desulfurization methods include: biological [16,17] and catalytic oxidation, a method with bog iron ore, a wet method, and adsorption techniques. Jędrczak [18] discussed other methods of H 2 S removal from biogas, based on: dosing of ferrous chloride to a digestion chamber, dosing air to biogas, absorption of chemicals binding H 2 S in solutions, absorption-oxidation processes, biological methods with bio-filters, and adsorption on activated carbon and alkaline iron oxide beds.…”

Section: Methods Of Biogas Desulfurizationmentioning

confidence: 99%

Sorbents Used for Biogas Desulfurization in the Adsorption Process

Kwaśny¹,

Balcerzak²

2016

Pol. J. Environ. Stud.

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“…Stoichiometrically, 0.5% concentration of air in biogas is required for the conversion of 2000 ppm H2S in biogas (20°C and 1 atm) to elemental sulphur and water. A pro-longed exposure to an excess of O2 can encourage acid-forming conditions favouring the further oxidation of elemental sulphur to sulphate (Pokorna and Zabranska, 2015).…”

Section: Biological H2s Removal Trials At Piggery (B)mentioning

confidence: 99%

Practical options for cleaning biogas prior to on-farm use at piggeries

Skerman¹

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Interest in the use of biogas from anaerobic digestion has been increasing within the Australian pork industry in recent years, driven by a significant potential for biogas use to buffer rising energy costs and to reduce carbon emissions from individual piggeries and across the whole pork industry. A recent life cycle assessment study suggested that a 64% reduction in piggery GHG emissions could be achieved by installing biogas capture and use systems. Further Government incentives have also contributed to the growing interest in on-farm biogas.One of the major obstacles to adoption of on-farm biogas technology in the Australian pork sector is the presence of relatively high concentrations of hydrogen sulphide (H2S) in raw piggery biogas, commonly in the range of 500 to 3000 ppm. Smelling like rotten eggs, H2S is highly toxic and corrosive. Exposure to H2S, even at relatively low concentrations, can result in severe human health impacts, while corrosion and increased maintenance of biogas use equipment necessitates some form of biogas treatment to remove H2S to suitable levels.Many of the existing biogas treatment technologies used in other industries are not ideally suited for on-farm application in the Australian pork industry, because on-farm systems must be relatively simple, low-cost, safe, robust and scalable, producing minimal hazardous waste products. However, a literature review, which examined various existing biogas purification technologies, identified biological oxidation of H2S and chemisorption with iron-based solid media as potential options for piggeries, provided that some key research and development gaps could be addressed. A particular issue with regard to chemisorption was the high cost of replacing commercial chemisorption medium (accounting for up to 5% of the savings derived from biogas use). Of further interest was the observation that the active components in commercial chemisorption media were also relatively common in natural materials such as soils, and even in some agricultural and industrial waste and by-products. However, such alternative chemisorption media required targeted laboratory and on-farm testing. With regard to biological oxidation, there was a need to determine whether the treated effluent outflow from a covered anaerobic lagoon could be used as a viable nutrient source in an external packed column system. This concept required testing on-farm.(ii)To assess chemisorption options, a detailed and carefully designed laboratory study tested and compared the H2S removal capacity of a commercial iron-based medium (cg5) with that of a range of low-cost alternative media. The results of these trials indicated a far superior performance of a commercial cg5 medium, probably due to its engineered high porosity and high iron content (the active ingredient). However, a locally sourced red soil was a potentially feasible alternative medium, with reasonable chemisorption capacity and likely low cost and ready availability, depending on the piggery locality. While the pressur...

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Sulfur-oxidizing bacteria in environmental technology

Cited by 349 publications

References 116 publications

Effects of N/S Molar Ratio on Product Formation in Psychrophilic Autotrophic Biological Removal of Sulfide

Effects of N/S Molar Ratio on Product Formation in Psychrophilic Autotrophic Biological Removal of Sulfide

Sorbents Used for Biogas Desulfurization in the Adsorption Process

Practical options for cleaning biogas prior to on-farm use at piggeries

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