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The removal of H2S from process air by diffusion into activated sludge.

Publication ,  Journal Article
Moussavi, G; Naddafi, K; Mesdaghinia, A; Deshusses, MA
Published in: Environmental technology
September 2007

Emissions of H2S from publicly owned treatment works is a serious problem, therefore collection and treatment of these emissions is essential. In this work, the performance of a bench scale activated sludge system used for the removal of H2S from foul air was investigated, and the effects of H2S concentration (5 to 50 ppm,) on COD reduction and biomass settleability were studied. After biomass acclimation, the reactor was operated in a continuous mode at a hydraulic retention time of 5 h and a mean cell residence time of 6 days. Results showed that COD and H2S removal were 93.5 and 94.5%, respectively. Furthermore, H2S concentration up to 50 ppm, did not significantly affect the COD reduction. H2S loading rates of up to 7.5 mg(H2S) g(-1)MLSS, d(-1) were treated with greater than 94% efficiency. The only adverse effect of H2S that was observed was an increase in the sludge volume index at loading rates over 4.5 mg(H2S) g(-1)MLSS d(-1), at which bulking of the sludge occurred. Overall, the results indicate that H2S at concentrations usually emitted from wastewater treatment processes (lower than 50 ppm(v)), can be efficiently treated by diffusion into activated sludge without compromising the performance of the activated sludge process.

Duke Scholars

Published In

Environmental technology

DOI

EISSN

1479-487X

ISSN

0959-3330

Publication Date

September 2007

Volume

28

Issue

9

Start / End Page

987 / 993

Related Subject Headings

  • Waste Disposal, Fluid
  • Sulfates
  • Sewage
  • Hydrogen Sulfide
  • Environmental Engineering
  • Diffusion
  • Bioreactors
  • Air Pollution
  • Air Pollutants
  • 41 Environmental sciences
 

Citation

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Moussavi, G., Naddafi, K., Mesdaghinia, A., & Deshusses, M. A. (2007). The removal of H2S from process air by diffusion into activated sludge. Environmental Technology, 28(9), 987–993. https://doi.org/10.1080/09593332808618856
Moussavi, G., K. Naddafi, A. Mesdaghinia, and M. A. Deshusses. “The removal of H2S from process air by diffusion into activated sludge.Environmental Technology 28, no. 9 (September 2007): 987–93. https://doi.org/10.1080/09593332808618856.
Moussavi G, Naddafi K, Mesdaghinia A, Deshusses MA. The removal of H2S from process air by diffusion into activated sludge. Environmental technology. 2007 Sep;28(9):987–93.
Moussavi, G., et al. “The removal of H2S from process air by diffusion into activated sludge.Environmental Technology, vol. 28, no. 9, Sept. 2007, pp. 987–93. Epmc, doi:10.1080/09593332808618856.
Moussavi G, Naddafi K, Mesdaghinia A, Deshusses MA. The removal of H2S from process air by diffusion into activated sludge. Environmental technology. 2007 Sep;28(9):987–993.

Published In

Environmental technology

DOI

EISSN

1479-487X

ISSN

0959-3330

Publication Date

September 2007

Volume

28

Issue

9

Start / End Page

987 / 993

Related Subject Headings

  • Waste Disposal, Fluid
  • Sulfates
  • Sewage
  • Hydrogen Sulfide
  • Environmental Engineering
  • Diffusion
  • Bioreactors
  • Air Pollution
  • Air Pollutants
  • 41 Environmental sciences