Increasing the Selectivity for Sulfur Formation in Biological Gas Desulfurization

Rieks De Rink, Johannes B.M. Klok, Gijs J. Van Heeringen, Dimitry Y. Sorokin, Annemiek Ter Heijne, Remco Zeijlmaker, Yvonne M. Mos, Vinnie De Wilde, Karel J. Keesman, Cees J.N. Buisman

Research output: Contribution to journalArticleAcademicpeer-review

2 Citations (Scopus)

Abstract

In the biotechnological desulfurization process under haloalkaline conditions, dihydrogen sulfide (H 2 S) is removed from sour gas and oxidized to elemental sulfur (S 8 ) by sulfide-oxidizing bacteria. Besides S 8 , the byproducts sulfate (SO 4 2- ) and thiosulfate (S 2 O 3 2- ) are formed, which consume caustic and form a waste stream. The aim of this study was to increase selectivity toward S 8 by a new process line-up for biological gas desulfurization, applying two bioreactors with different substrate conditions (i.e., sulfidic and microaerophilic), instead of one (i.e., microaerophilic). A 111-day continuous test, mimicking full scale operation, demonstrated that S 8 formation was 96.6% on a molar H 2 S supply basis; selectivity for SO 4 2- and S 2 O 3 2- were 1.4 and 2.0% respectively. The selectivity for S 8 formation in a control experiment with the conventional 1-bioreactor line-up was 75.6 mol %. At start-up, the new process line-up immediately achieved lower SO 4 2- and S 2 O 3 2- formations compared to the 1-bioreactor line-up. When the microbial community adapted over time, it was observed that SO 4 2- formation further decreased. In addition, chemical formation of S 2 O 3 2- was reduced due to biologically mediated removal of sulfide from the process solution in the anaerobic bioreactor. The increased selectivity for S 8 formation will result in 90% reduction in caustic consumption and waste stream formation compared to the 1-bioreactor line-up.

Original languageEnglish
Pages (from-to)4519-4527
Number of pages9
JournalEnvironmental Science and Technology
Volume53
Issue number8
DOIs
Publication statusPublished - 16 Apr 2019

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Desulfurization
Sulfur
bioreactor
Bioreactors
Gases
sulfur
Sulfides
gas
sulfide
Caustics
thiosulfate
Sour gas
Thiosulfates
microbial community
Sulfates
Byproducts
S(8)
Bacteria
sulfate
substrate

Cite this

De Rink, Rieks ; Klok, Johannes B.M. ; Van Heeringen, Gijs J. ; Sorokin, Dimitry Y. ; Ter Heijne, Annemiek ; Zeijlmaker, Remco ; Mos, Yvonne M. ; De Wilde, Vinnie ; Keesman, Karel J. ; Buisman, Cees J.N. / Increasing the Selectivity for Sulfur Formation in Biological Gas Desulfurization. In: Environmental Science and Technology. 2019 ; Vol. 53, No. 8. pp. 4519-4527.
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title = "Increasing the Selectivity for Sulfur Formation in Biological Gas Desulfurization",
abstract = "In the biotechnological desulfurization process under haloalkaline conditions, dihydrogen sulfide (H 2 S) is removed from sour gas and oxidized to elemental sulfur (S 8 ) by sulfide-oxidizing bacteria. Besides S 8 , the byproducts sulfate (SO 4 2- ) and thiosulfate (S 2 O 3 2- ) are formed, which consume caustic and form a waste stream. The aim of this study was to increase selectivity toward S 8 by a new process line-up for biological gas desulfurization, applying two bioreactors with different substrate conditions (i.e., sulfidic and microaerophilic), instead of one (i.e., microaerophilic). A 111-day continuous test, mimicking full scale operation, demonstrated that S 8 formation was 96.6{\%} on a molar H 2 S supply basis; selectivity for SO 4 2- and S 2 O 3 2- were 1.4 and 2.0{\%} respectively. The selectivity for S 8 formation in a control experiment with the conventional 1-bioreactor line-up was 75.6 mol {\%}. At start-up, the new process line-up immediately achieved lower SO 4 2- and S 2 O 3 2- formations compared to the 1-bioreactor line-up. When the microbial community adapted over time, it was observed that SO 4 2- formation further decreased. In addition, chemical formation of S 2 O 3 2- was reduced due to biologically mediated removal of sulfide from the process solution in the anaerobic bioreactor. The increased selectivity for S 8 formation will result in 90{\%} reduction in caustic consumption and waste stream formation compared to the 1-bioreactor line-up.",
author = "{De Rink}, Rieks and Klok, {Johannes B.M.} and {Van Heeringen}, {Gijs J.} and Sorokin, {Dimitry Y.} and {Ter Heijne}, Annemiek and Remco Zeijlmaker and Mos, {Yvonne M.} and {De Wilde}, Vinnie and Keesman, {Karel J.} and Buisman, {Cees J.N.}",
year = "2019",
month = "4",
day = "16",
doi = "10.1021/acs.est.8b06749",
language = "English",
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Increasing the Selectivity for Sulfur Formation in Biological Gas Desulfurization. / De Rink, Rieks; Klok, Johannes B.M.; Van Heeringen, Gijs J.; Sorokin, Dimitry Y.; Ter Heijne, Annemiek; Zeijlmaker, Remco; Mos, Yvonne M.; De Wilde, Vinnie; Keesman, Karel J.; Buisman, Cees J.N.

In: Environmental Science and Technology, Vol. 53, No. 8, 16.04.2019, p. 4519-4527.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Increasing the Selectivity for Sulfur Formation in Biological Gas Desulfurization

AU - De Rink, Rieks

AU - Klok, Johannes B.M.

AU - Van Heeringen, Gijs J.

AU - Sorokin, Dimitry Y.

AU - Ter Heijne, Annemiek

AU - Zeijlmaker, Remco

AU - Mos, Yvonne M.

AU - De Wilde, Vinnie

AU - Keesman, Karel J.

AU - Buisman, Cees J.N.

PY - 2019/4/16

Y1 - 2019/4/16

N2 - In the biotechnological desulfurization process under haloalkaline conditions, dihydrogen sulfide (H 2 S) is removed from sour gas and oxidized to elemental sulfur (S 8 ) by sulfide-oxidizing bacteria. Besides S 8 , the byproducts sulfate (SO 4 2- ) and thiosulfate (S 2 O 3 2- ) are formed, which consume caustic and form a waste stream. The aim of this study was to increase selectivity toward S 8 by a new process line-up for biological gas desulfurization, applying two bioreactors with different substrate conditions (i.e., sulfidic and microaerophilic), instead of one (i.e., microaerophilic). A 111-day continuous test, mimicking full scale operation, demonstrated that S 8 formation was 96.6% on a molar H 2 S supply basis; selectivity for SO 4 2- and S 2 O 3 2- were 1.4 and 2.0% respectively. The selectivity for S 8 formation in a control experiment with the conventional 1-bioreactor line-up was 75.6 mol %. At start-up, the new process line-up immediately achieved lower SO 4 2- and S 2 O 3 2- formations compared to the 1-bioreactor line-up. When the microbial community adapted over time, it was observed that SO 4 2- formation further decreased. In addition, chemical formation of S 2 O 3 2- was reduced due to biologically mediated removal of sulfide from the process solution in the anaerobic bioreactor. The increased selectivity for S 8 formation will result in 90% reduction in caustic consumption and waste stream formation compared to the 1-bioreactor line-up.

AB - In the biotechnological desulfurization process under haloalkaline conditions, dihydrogen sulfide (H 2 S) is removed from sour gas and oxidized to elemental sulfur (S 8 ) by sulfide-oxidizing bacteria. Besides S 8 , the byproducts sulfate (SO 4 2- ) and thiosulfate (S 2 O 3 2- ) are formed, which consume caustic and form a waste stream. The aim of this study was to increase selectivity toward S 8 by a new process line-up for biological gas desulfurization, applying two bioreactors with different substrate conditions (i.e., sulfidic and microaerophilic), instead of one (i.e., microaerophilic). A 111-day continuous test, mimicking full scale operation, demonstrated that S 8 formation was 96.6% on a molar H 2 S supply basis; selectivity for SO 4 2- and S 2 O 3 2- were 1.4 and 2.0% respectively. The selectivity for S 8 formation in a control experiment with the conventional 1-bioreactor line-up was 75.6 mol %. At start-up, the new process line-up immediately achieved lower SO 4 2- and S 2 O 3 2- formations compared to the 1-bioreactor line-up. When the microbial community adapted over time, it was observed that SO 4 2- formation further decreased. In addition, chemical formation of S 2 O 3 2- was reduced due to biologically mediated removal of sulfide from the process solution in the anaerobic bioreactor. The increased selectivity for S 8 formation will result in 90% reduction in caustic consumption and waste stream formation compared to the 1-bioreactor line-up.

U2 - 10.1021/acs.est.8b06749

DO - 10.1021/acs.est.8b06749

M3 - Article

VL - 53

SP - 4519

EP - 4527

JO - Environmental Science and Technology

JF - Environmental Science and Technology

SN - 0013-936X

IS - 8

ER -