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Nitrifying trickling filters and denitrifying bioreactors for nitrogen management of high-strength anaerobic digestion effluent.

Publication ,  Journal Article
Forbis-Stokes, AA; Rocha-Melogno, L; Deshusses, MA
Published in: Chemosphere
August 2018

The treatment of high-strength anaerobic digester effluent in laboratory-scale trickling filters for nitrification and then anaerobic filters for denitrification is reported. Five media types were investigated in the trickling filters: biochar, granular activated carbon (GAC), zeolite, Pall rings, and gravel. Three media were tested in five denitrifying filters: sand (S), bamboo wood chips (B), eucalyptus wood chips (E), bamboo with sand (B+S), and eucalyptus with sand (E+S). The different wood chips served as a supplemental electron donor for denitrification. From six months of operation, biochar, GAC, zeolite, Pall rings, and gravel media had turbidity (NTU) removal efficiencies of 90, 91, 77, 74, and 74%, respectively, and ammonia removal efficiencies of 83, 87, 85, 30, and 80%, respectively, which was primarily by nitrification to nitrate. For the anaerobic filters, S, B, B+S, E, and E+S had nitrate removal efficiencies of 30, 66, 53, 35, and 35%, and turbidity removal efficiencies of 88, 89, 84, 89, and 88%, respectively. Biochar and bamboo were selected as the best combination of media for trickling filter and anaerobic filter sequential treatment. Based on an average initial influent of 600 mg NH3-N L-1, 50 mg NO3-N L-1, and 980 NTU, the biochar filter's effluent would be 97 mg NH3-N L-1, 475 mg NO3-N L-1, and 120 NTU. The bamboo filter's final effluent would be 82 mg NH3-N L-1, 157 mg NO3-N L-1, and 13 NTU, which corresponds to 63% removal of total N and 99% removal of turbidity. These filter media thus present a simple option for sustainable post-treatment for nitrogen management and effluent polishing in low-resources settings.

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Published In

Chemosphere

DOI

EISSN

1879-1298

ISSN

0045-6535

Publication Date

August 2018

Volume

204

Start / End Page

119 / 129

Related Subject Headings

  • Water Purification
  • Waste Disposal, Fluid
  • Nitrogen
  • Nitrification
  • Meteorology & Atmospheric Sciences
  • Filtration
  • Environmental Sciences
  • Denitrification
  • Charcoal
  • Bioreactors
 

Citation

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ICMJE
MLA
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Forbis-Stokes, A. A., Rocha-Melogno, L., & Deshusses, M. A. (2018). Nitrifying trickling filters and denitrifying bioreactors for nitrogen management of high-strength anaerobic digestion effluent. Chemosphere, 204, 119–129. https://doi.org/10.1016/j.chemosphere.2018.03.137
Forbis-Stokes, Aaron A., Lucas Rocha-Melogno, and Marc A. Deshusses. “Nitrifying trickling filters and denitrifying bioreactors for nitrogen management of high-strength anaerobic digestion effluent.Chemosphere 204 (August 2018): 119–29. https://doi.org/10.1016/j.chemosphere.2018.03.137.
Forbis-Stokes, Aaron A., et al. “Nitrifying trickling filters and denitrifying bioreactors for nitrogen management of high-strength anaerobic digestion effluent.Chemosphere, vol. 204, Aug. 2018, pp. 119–29. Epmc, doi:10.1016/j.chemosphere.2018.03.137.
Forbis-Stokes AA, Rocha-Melogno L, Deshusses MA. Nitrifying trickling filters and denitrifying bioreactors for nitrogen management of high-strength anaerobic digestion effluent. Chemosphere. 2018 Aug;204:119–129.
Journal cover image

Published In

Chemosphere

DOI

EISSN

1879-1298

ISSN

0045-6535

Publication Date

August 2018

Volume

204

Start / End Page

119 / 129

Related Subject Headings

  • Water Purification
  • Waste Disposal, Fluid
  • Nitrogen
  • Nitrification
  • Meteorology & Atmospheric Sciences
  • Filtration
  • Environmental Sciences
  • Denitrification
  • Charcoal
  • Bioreactors