Effect of supplementary carbon addition in the treatment of low C/N high-technology industrial wastewater by MBR

Mathava Kumar, Pei Yun Lee, Toshikazu Fukusihma, Liang Ming Whang, Jih Gaw Lin

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39 Citations (Scopus)

Abstract

The effect of supplementary carbon addition for the treatment of high-technology industrial wastewater in a membrane bioreactor (MBR) was investigated. The MBR was operated for 302days under different C/N (BODL/NH4+-N) ratios, i.e. 0.9-1 to 20days, 1.6-21 to 42days, 2.9-43 to 82days, 3.6-83 to 141days, 4.8-165 to 233days and 9.3-240 to 302days. Irrespective of the C/N ratios investigated, SS and BOD 5 removal efficiencies were above 95% and above 80% COD removal efficiency was observed. In addition, complete nitrification was observed throughout the investigation. However, denitrification and total nitrogen removal efficiencies reached their maximum values at the highest C/N ratio (9.3) investigated. Real-time PCR analysis revealed 10times higher ammonia oxidizing bacteria to total bacteria ratio under the highest C/N ratio condition (9.3) compared to the low C/N ratio condition (1.6).

Original languageEnglish
Pages (from-to)148-153
Number of pages6
JournalBioresource technology
Volume113
DOIs
Publication statusPublished - 2012 Jun 1

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal

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