Response surface methodology for optimization of simultaneous COD, NH4 +-N and Mn2+ removal from drinking water by biological aerated filter

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Abstract

This study investigated the effectiveness of a biological aerated filter (BAF) as an additional treatment in drinking water treatment plant systems for simultaneous chemical oxygen demand (COD), ammonium (NH4 +-N) and manganese (Mn2+) removal. The experimental design was face centered-central composite design (FC-CCD) with three operational variables: COD load, aeration rate (AR) and hydraulic retention time (HRT). Optimum conditions for maximum COD, NH4 +-N and Mn2+ removal were determined through response surface methodology, where COD load was set as the maximum while aeration rate and hydraulic retention time were minimized. The optimum conditions were found to be COD load of 0.90kg/m3, AR of 0.30L/min and HRT of 7.47h with predicted simultaneous COD, NH4 +-N and Mn2+ removal as 95.5%, 93.9% and 94.8%, respectively. These optimum conditions were used to estimate investment and operating cost of BAF system for a treatment capacity of 100,000m3/day. The total capital and operating costs were estimated to be US$ 8,110,600 and US$ 0.022 per m3, respectively.

Original languageEnglish
Pages (from-to)50-61
Number of pages12
JournalDesalination
Volume275
Issue number1-3
DOIs
Publication statusPublished - 15 Jul 2011

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Chemical oxygen demand
Potable water
Drinking Water
chemical oxygen demand
drinking water
filter
aeration
Hydraulics
hydraulics
Operating costs
Water treatment plants
Ammonium Compounds
cost
experimental design
Design of experiments
response surface methodology
removal
manganese
ammonium
Composite materials

Keywords

  • Biological aerated filter
  • Drinking water treatment
  • Response surface methodology
  • Simultaneous NH -N and Mn removal

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Mechanical Engineering
  • Chemistry(all)
  • Materials Science(all)
  • Water Science and Technology

Cite this

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title = "Response surface methodology for optimization of simultaneous COD, NH4 +-N and Mn2+ removal from drinking water by biological aerated filter",
abstract = "This study investigated the effectiveness of a biological aerated filter (BAF) as an additional treatment in drinking water treatment plant systems for simultaneous chemical oxygen demand (COD), ammonium (NH4 +-N) and manganese (Mn2+) removal. The experimental design was face centered-central composite design (FC-CCD) with three operational variables: COD load, aeration rate (AR) and hydraulic retention time (HRT). Optimum conditions for maximum COD, NH4 +-N and Mn2+ removal were determined through response surface methodology, where COD load was set as the maximum while aeration rate and hydraulic retention time were minimized. The optimum conditions were found to be COD load of 0.90kg/m3, AR of 0.30L/min and HRT of 7.47h with predicted simultaneous COD, NH4 +-N and Mn2+ removal as 95.5{\%}, 93.9{\%} and 94.8{\%}, respectively. These optimum conditions were used to estimate investment and operating cost of BAF system for a treatment capacity of 100,000m3/day. The total capital and operating costs were estimated to be US$ 8,110,600 and US$ 0.022 per m3, respectively.",
keywords = "Biological aerated filter, Drinking water treatment, Response surface methodology, Simultaneous NH -N and Mn removal",
author = "{Abu Hasan}, Hassimi and {Sheikh Abdullah}, {Siti Rozaimah} and Kamarudin, {Siti Kartom} and {Tan Kofli}, Noorhisham",
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AU - Tan Kofli, Noorhisham

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