Simultaneous sulfide and acetate oxidation under denitrifying conditions using an inverse fluidized bed reactor

Ricardo Beristain-Cardoso, Anne Claire Texier, Maria Reye Sierra Alvarez, James A Field, Elías Razo-Flores, Jorge Gómez

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Background: Simultaneous removal of sulfur, nitrogen and carbon compounds from wastewaters is a commercially important biological process. The objective was to evaluate the influence of the CH3COO-/ NO3- molar ratio on the sulfide oxidation process using an inverse fluidized bed reactor (IFBR). Results: Three molar ratios of CH3COO-/NO3- (0.85, 0.72 and 0.62) with a constant S2-/NO3- molar ratio of 0.13 were evaluated. At a CH3COO-/NO3- molar ratio of 0.85, the nitrate, acetate and sulfide removal efficiencies were approximately 100%. The N2 yield (g N2 g-1 NO3- -N consumed) was 0.81. Acetate was mineralized, resulting in a yield of 0.65 g inorganic-C g-1 CH3COO- -C consumed. Sulfide was partially oxidized to S0, and 71% of the S2- consumed was recovered as elemental sulfur by a settler installed in the IFBR. At a CH3COO-/ NO3- molar ratio of 0.72, the efficiencies of nitrate, acetate and sulfide consumption were of 100%, with N2 and inorganic-C yields of 0.84 and 0.69, respectively. The sulfide was recovered as sulfate instead of S0, with a yield of 0.92 g S04 2- -S g-1 S2- consumed. Conclusions: The CH3COO-/NO3 - molar ratio was shown to be an important parameter that can be used to control the fate of sulfide oxidation to either S0 or sulfate. In this study, the potential of denitrification for the simultaneous removal of organic matter, sulfide and nitrate from wastewaters was demonstrated, obtaining CO2, S0 and N2 as the major end products.

Original languageEnglish (US)
Pages (from-to)1197-1203
Number of pages7
JournalJournal of Chemical Technology and Biotechnology
Volume83
Issue number9
DOIs
StatePublished - Sep 2008

Fingerprint

Sulfides
Fluidized beds
acetate
Acetates
sulfide
oxidation
Oxidation
Nitrates
Waste Water
nitrate
Sulfur
Sulfates
Wastewater
sulfur
sulfate
Nitrogen Compounds
Biological Phenomena
Denitrification
wastewater
reactor

Keywords

  • Denitrification
  • Elemental sulfur
  • Inverse fluidized bed reactor
  • Sulfide oxidation

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Biotechnology
  • Bioengineering

Cite this

Simultaneous sulfide and acetate oxidation under denitrifying conditions using an inverse fluidized bed reactor. / Beristain-Cardoso, Ricardo; Texier, Anne Claire; Sierra Alvarez, Maria Reye; Field, James A; Razo-Flores, Elías; Gómez, Jorge.

In: Journal of Chemical Technology and Biotechnology, Vol. 83, No. 9, 09.2008, p. 1197-1203.

Research output: Contribution to journalArticle

@article{9ff5f4d375954689b23bb3c327577a1e,
title = "Simultaneous sulfide and acetate oxidation under denitrifying conditions using an inverse fluidized bed reactor",
abstract = "Background: Simultaneous removal of sulfur, nitrogen and carbon compounds from wastewaters is a commercially important biological process. The objective was to evaluate the influence of the CH3COO-/ NO3- molar ratio on the sulfide oxidation process using an inverse fluidized bed reactor (IFBR). Results: Three molar ratios of CH3COO-/NO3- (0.85, 0.72 and 0.62) with a constant S2-/NO3- molar ratio of 0.13 were evaluated. At a CH3COO-/NO3- molar ratio of 0.85, the nitrate, acetate and sulfide removal efficiencies were approximately 100{\%}. The N2 yield (g N2 g-1 NO3- -N consumed) was 0.81. Acetate was mineralized, resulting in a yield of 0.65 g inorganic-C g-1 CH3COO- -C consumed. Sulfide was partially oxidized to S0, and 71{\%} of the S2- consumed was recovered as elemental sulfur by a settler installed in the IFBR. At a CH3COO-/ NO3- molar ratio of 0.72, the efficiencies of nitrate, acetate and sulfide consumption were of 100{\%}, with N2 and inorganic-C yields of 0.84 and 0.69, respectively. The sulfide was recovered as sulfate instead of S0, with a yield of 0.92 g S04 2- -S g-1 S2- consumed. Conclusions: The CH3COO-/NO3 - molar ratio was shown to be an important parameter that can be used to control the fate of sulfide oxidation to either S0 or sulfate. In this study, the potential of denitrification for the simultaneous removal of organic matter, sulfide and nitrate from wastewaters was demonstrated, obtaining CO2, S0 and N2 as the major end products.",
keywords = "Denitrification, Elemental sulfur, Inverse fluidized bed reactor, Sulfide oxidation",
author = "Ricardo Beristain-Cardoso and Texier, {Anne Claire} and {Sierra Alvarez}, {Maria Reye} and Field, {James A} and El{\'i}as Razo-Flores and Jorge G{\'o}mez",
year = "2008",
month = "9",
doi = "10.1002/jctb.1921",
language = "English (US)",
volume = "83",
pages = "1197--1203",
journal = "Journal of Chemical Technology and Biotechnology",
issn = "0268-2575",
publisher = "John Wiley and Sons Ltd",
number = "9",

}

TY - JOUR

T1 - Simultaneous sulfide and acetate oxidation under denitrifying conditions using an inverse fluidized bed reactor

AU - Beristain-Cardoso, Ricardo

AU - Texier, Anne Claire

AU - Sierra Alvarez, Maria Reye

AU - Field, James A

AU - Razo-Flores, Elías

AU - Gómez, Jorge

PY - 2008/9

Y1 - 2008/9

N2 - Background: Simultaneous removal of sulfur, nitrogen and carbon compounds from wastewaters is a commercially important biological process. The objective was to evaluate the influence of the CH3COO-/ NO3- molar ratio on the sulfide oxidation process using an inverse fluidized bed reactor (IFBR). Results: Three molar ratios of CH3COO-/NO3- (0.85, 0.72 and 0.62) with a constant S2-/NO3- molar ratio of 0.13 were evaluated. At a CH3COO-/NO3- molar ratio of 0.85, the nitrate, acetate and sulfide removal efficiencies were approximately 100%. The N2 yield (g N2 g-1 NO3- -N consumed) was 0.81. Acetate was mineralized, resulting in a yield of 0.65 g inorganic-C g-1 CH3COO- -C consumed. Sulfide was partially oxidized to S0, and 71% of the S2- consumed was recovered as elemental sulfur by a settler installed in the IFBR. At a CH3COO-/ NO3- molar ratio of 0.72, the efficiencies of nitrate, acetate and sulfide consumption were of 100%, with N2 and inorganic-C yields of 0.84 and 0.69, respectively. The sulfide was recovered as sulfate instead of S0, with a yield of 0.92 g S04 2- -S g-1 S2- consumed. Conclusions: The CH3COO-/NO3 - molar ratio was shown to be an important parameter that can be used to control the fate of sulfide oxidation to either S0 or sulfate. In this study, the potential of denitrification for the simultaneous removal of organic matter, sulfide and nitrate from wastewaters was demonstrated, obtaining CO2, S0 and N2 as the major end products.

AB - Background: Simultaneous removal of sulfur, nitrogen and carbon compounds from wastewaters is a commercially important biological process. The objective was to evaluate the influence of the CH3COO-/ NO3- molar ratio on the sulfide oxidation process using an inverse fluidized bed reactor (IFBR). Results: Three molar ratios of CH3COO-/NO3- (0.85, 0.72 and 0.62) with a constant S2-/NO3- molar ratio of 0.13 were evaluated. At a CH3COO-/NO3- molar ratio of 0.85, the nitrate, acetate and sulfide removal efficiencies were approximately 100%. The N2 yield (g N2 g-1 NO3- -N consumed) was 0.81. Acetate was mineralized, resulting in a yield of 0.65 g inorganic-C g-1 CH3COO- -C consumed. Sulfide was partially oxidized to S0, and 71% of the S2- consumed was recovered as elemental sulfur by a settler installed in the IFBR. At a CH3COO-/ NO3- molar ratio of 0.72, the efficiencies of nitrate, acetate and sulfide consumption were of 100%, with N2 and inorganic-C yields of 0.84 and 0.69, respectively. The sulfide was recovered as sulfate instead of S0, with a yield of 0.92 g S04 2- -S g-1 S2- consumed. Conclusions: The CH3COO-/NO3 - molar ratio was shown to be an important parameter that can be used to control the fate of sulfide oxidation to either S0 or sulfate. In this study, the potential of denitrification for the simultaneous removal of organic matter, sulfide and nitrate from wastewaters was demonstrated, obtaining CO2, S0 and N2 as the major end products.

KW - Denitrification

KW - Elemental sulfur

KW - Inverse fluidized bed reactor

KW - Sulfide oxidation

UR - http://www.scopus.com/inward/record.url?scp=50849083163&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=50849083163&partnerID=8YFLogxK

U2 - 10.1002/jctb.1921

DO - 10.1002/jctb.1921

M3 - Article

AN - SCOPUS:50849083163

VL - 83

SP - 1197

EP - 1203

JO - Journal of Chemical Technology and Biotechnology

JF - Journal of Chemical Technology and Biotechnology

SN - 0268-2575

IS - 9

ER -