Nitrogen-removal efficiency in an upflow partially packed biological aerated filter (BAF) without backwashing process

Pramanik Biplob, Fatihah Suja`, Shahrom Md Zain, Elshafie Ahmed

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

An upflow, partially packed biological aerated filter (BAF) reactor was used to remove nitrogen in the form of ammonia ions by a nitrification process that involves physical, chemical and biological phenomena governed by a variety of parameters such as dissolved oxygen concentration, pH and alkalinity. Dissolved oxygen (DO) and pH were shown to have effects on the nitrification process in this study. Three C:N ratios i.e., 10, 4 and 1 were compared during this study by varying the nitrogen loading while the carbon loading was kept constant at 0.405 ± 0.015 kg chemical oxygen demand m -3 d -1. The removal efficiencies of ammonia linearly increase with arise of the initial concentration of ammonia-nitrogen. The results of the 115 days' operation of the BAF system showed that its overall NH3-N performance was good, where a removal efficiency of 87.0 ± 2.9%, 89.2 ± 1.38% and 91.1 ± 0.7% and COD removal of 87.6 ± 2.9%, 86.4 ± 2.1% and 89.5 ± 2.6% were achieved for the C:N ratios of 10, 4 and 1, respectively on average, over 6 h hydraulic retention time (HRT). No clogging occurred throughout the period although backwashing was eliminated. It was concluded that the BAF system proposed in this study removed nitrogen by the nitrification process extremely well.

Original languageEnglish
Pages (from-to)27-35
Number of pages9
JournalJournal of Water Reuse and Desalination
Volume1
Issue number1
DOIs
Publication statusPublished - 2011

Fingerprint

Nitrogen removal
Nitrification
Nitrogen
Ammonia
filter
nitrification
ammonia
nitrogen
Dissolved oxygen
dissolved oxygen
Chemical oxygen demand
Alkalinity
chemical oxygen demand
alkalinity
Carbon
Hydraulics
Ions
hydraulics
removal
ion

Keywords

  • Alkalinity
  • Biological aerated filter (BAF)
  • C:N ratio
  • DO
  • Nitrification
  • pH

ASJC Scopus subject areas

  • Filtration and Separation
  • Water Science and Technology

Cite this

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title = "Nitrogen-removal efficiency in an upflow partially packed biological aerated filter (BAF) without backwashing process",
abstract = "An upflow, partially packed biological aerated filter (BAF) reactor was used to remove nitrogen in the form of ammonia ions by a nitrification process that involves physical, chemical and biological phenomena governed by a variety of parameters such as dissolved oxygen concentration, pH and alkalinity. Dissolved oxygen (DO) and pH were shown to have effects on the nitrification process in this study. Three C:N ratios i.e., 10, 4 and 1 were compared during this study by varying the nitrogen loading while the carbon loading was kept constant at 0.405 ± 0.015 kg chemical oxygen demand m -3 d -1. The removal efficiencies of ammonia linearly increase with arise of the initial concentration of ammonia-nitrogen. The results of the 115 days' operation of the BAF system showed that its overall NH3-N performance was good, where a removal efficiency of 87.0 ± 2.9{\%}, 89.2 ± 1.38{\%} and 91.1 ± 0.7{\%} and COD removal of 87.6 ± 2.9{\%}, 86.4 ± 2.1{\%} and 89.5 ± 2.6{\%} were achieved for the C:N ratios of 10, 4 and 1, respectively on average, over 6 h hydraulic retention time (HRT). No clogging occurred throughout the period although backwashing was eliminated. It was concluded that the BAF system proposed in this study removed nitrogen by the nitrification process extremely well.",
keywords = "Alkalinity, Biological aerated filter (BAF), C:N ratio, DO, Nitrification, pH",
author = "Pramanik Biplob and Fatihah Suja` and {Md Zain}, Shahrom and Elshafie Ahmed",
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AU - Ahmed, Elshafie

PY - 2011

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N2 - An upflow, partially packed biological aerated filter (BAF) reactor was used to remove nitrogen in the form of ammonia ions by a nitrification process that involves physical, chemical and biological phenomena governed by a variety of parameters such as dissolved oxygen concentration, pH and alkalinity. Dissolved oxygen (DO) and pH were shown to have effects on the nitrification process in this study. Three C:N ratios i.e., 10, 4 and 1 were compared during this study by varying the nitrogen loading while the carbon loading was kept constant at 0.405 ± 0.015 kg chemical oxygen demand m -3 d -1. The removal efficiencies of ammonia linearly increase with arise of the initial concentration of ammonia-nitrogen. The results of the 115 days' operation of the BAF system showed that its overall NH3-N performance was good, where a removal efficiency of 87.0 ± 2.9%, 89.2 ± 1.38% and 91.1 ± 0.7% and COD removal of 87.6 ± 2.9%, 86.4 ± 2.1% and 89.5 ± 2.6% were achieved for the C:N ratios of 10, 4 and 1, respectively on average, over 6 h hydraulic retention time (HRT). No clogging occurred throughout the period although backwashing was eliminated. It was concluded that the BAF system proposed in this study removed nitrogen by the nitrification process extremely well.

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