H2S removal and bacterial structure along a full-scale biofilter bed packed with polyurethane foam in a landfill site

Li, Lin; Han, Yizhuo; Xu, Yan; Liu, Junxin

doi:10.1016/j.biortech.2013.07.143

Cited by 36 publications

(13 citation statements)

References 27 publications

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“…[1] These compounds can be removed either by conventional physico-chemical processes or by employing (haloalkaliphilic) sulphur-oxidizing bacteria (SOB). [2][3][4][5] A commonly applied process for the biological removal of H 2 S consists of a gas absorber, a sulphide-oxidizing bioreactor and a gravity settler for the removal of the formed sulphur particles (Figure 1). [6] The absorbed H 2 S, hereafter referred to as 'sulphide', is biologically oxidized to elemental sulphur (Equation (1)) and to sulphate (Equation (2)), but it can also be chemically oxidized to thiosulphate through intermediate polysulphide anions.…”

Section: Introductionmentioning

confidence: 99%

Influence of methanethiol on biological sulphide oxidation in gas treatment system

Roman

Bijmans²,

Janssen

2016

Environmental Technology

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Inorganic and organic sulphur compounds such as hydrogen sulphide (H 2 S) and thiols (RSH) are unwanted components in sour gas streams (e.g. biogas and refinery gases) because of their toxicity, corrosivity and bad smell. Biological treatment processes are often used to remove H 2 S at small and medium scales (<50 tons per day of H 2 S). Preliminarily research by our group focused on achieving maximum sulphur production from biological H 2 S oxidation in the presence of methanethiol. In this paper the underlying principles have been further studied by assessing the effect of methanethiol on the biological conversion of H 2 S under a wide range of redox conditions covering not only sulphur but also sulphate-producing conditions. Furthermore, our experiments were performed in an integrated system consisting of a gas absorber and a bioreactor in order to assess the effect of methanethiol on the overall gas treatment efficiency. This study shows that methanethiol inhibits the biological oxidation of H 2 S to sulphate by way of direct suppression of the cytochrome c oxidase activity in biomass, whereas the oxidation of H 2 S to sulphur was hardly affected. We estimated the kinetic parameters of biological H 2 S oxidation that can be used to develop a mathematical model to quantitatively describe the biodesulphurization process. Finally, it was found that methanethiol acts as a competitive inhibitor; therefore, its negative effect can be minimized by increasing the enzyme (biomass) concentration and the substrate (sulphide) concentration, which in practice means operating the biodesulphurization systems under low redox conditions. ARTICLE HISTORY

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Section: Introductionmentioning

confidence: 99%

Influence of methanethiol on biological sulphide oxidation in gas treatment system

Roman

Bijmans²,

Janssen

2016

Environmental Technology

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“…Ochrobactrum was the only microbial genus presented in all biofilters operated, although this occurred only during the first stage. Ochrobactrum species have been reported in biofilters treating H 2 S because of its sulfur oxidative and nitrite reduction capacities . Moreover, in accordance with its genetic information, Ochrobactrum is capable to oxidize formaldehyde, which is the first intermediate of methanol degradation by P. pastoris .…”

Section: Discussionmentioning

confidence: 90%

Microbial contamination in methanol biofilters inoculated with a pure strain of Pichia pastoris: A potential limitation for waste revalorization

Palomo-Briones

Esquivel-González

Aizpuru

et al. 2018

Biotechnology Progress

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Novel biotechnologies to valorize waste emissions are based on the use of specialized microbial groups that produce different compounds of industrial interest. On this scenario, the retention of such specific microorganisms in the system is of critical interest; however, the potential limitations of working with simplified cultures in a competitive open environment are neither fully explored nor well understood. In this work, a series of biofilters treating methanol vapors coupled with heterologous endochitinase production were used to evaluate the performance of a specialized microbial population during a typical open‐to‐environment operation. The biofilters were inoculated with a transformed strain of Pichia pastoris and were operated identically for about 90 days. The results showed that the biofiltration performance became diverse with time in terms of the elimination capacity (EC) shifting from a variation coefficient of 1.5% (EC = 274 ± 24, 279 ± 5, and 281.9 ± 25 g/[m3 h]) at the beginning of the operation to 33% (EC = 297 ± 9, 338 ± 7, and 341 ± 2 g/[m3 h]) at the end of operation. Epifluorescence analysis and cloning‐sequencing suggested that P. pastoris remained as the dominant microorganism of methanol degradation, whereas diverse airborne bacteria, including Ochrobactrum spp. and Klebsiella oxytoca, played a secondary role possibly associated with the consumption of intermediates. Overall, this study found that low diversity systems operated under non‐sterile conditions could be susceptible to contamination with external microorganisms causing a diversifying behavior at the performance and microbial community levels. © 2018 American Institute of Chemical Engineers Biotechnol. Prog., 35: e2715, 2019

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“…Pseudomonas sp. is usually used to remove sulfur-containing compounds with removal efficiencies higher than 90% (Li et al, 2013;Omri et al, 2011). Band B7 was closely associated with Bacillus sp.…”

Section: Microbial Characteristicsmentioning

confidence: 98%

Thermophilic biofilter for SO2 removal: Performance and microbial characteristics

Zhang

Liu

2015

Bioresource Technology

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H2S removal and bacterial structure along a full-scale biofilter bed packed with polyurethane foam in a landfill site

Cited by 36 publications

References 27 publications

Influence of methanethiol on biological sulphide oxidation in gas treatment system

Influence of methanethiol on biological sulphide oxidation in gas treatment system

Microbial contamination in methanol biofilters inoculated with a pure strain of Pichia pastoris: A potential limitation for waste revalorization

Thermophilic biofilter for SO2 removal: Performance and microbial characteristics

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