Kinetics of biological treatment of phenolic wastewater in three-phase fluidized bed containing biofilm and suspended sludge

A. Hirata, M. Noguchi, N. Takeuchi, S. Tsuneda

Research output: Contribution to journalConference article

24 Citations (Scopus)

Abstract

Phenolic wastewater was treated in complete mixing type three-phase fluidized bed which contained both biofilm and suspended sludge. By considering the contributions of biofilm and suspended sludge to biodegradation of phenol separately, phenol removal rates with biofilm and with suspended sludge were evaluated both theoretically and experimentally. As a result, biodegradation of phenolic wastewater by biofilm process could be treated as a zero-order reaction. The volumetric biological removal rates with biofilm was proportional to the specific surface area of the biofilm with biodegradation coefficients (K) of 1.25 x 10-2 kg-PhOH/m2-biofilm/d. At a lower suspended sludge concentration, bioparticle diameter and bioparticle hold-up in the three-phase fluidized bed reactor were decisive factors for the efficiency of phenol treatment, and it was also proved that almost 100% of phenol removal could be attained at a larger specific biofilm surface area per volumetric phenol loading rate than 80 m2/(kg-PhOH/d) without suspended sludge.

Original languageEnglish
Pages (from-to)205-212
Number of pages8
JournalWater Science and Technology
Volume38
Issue number8-9 -9 pt 7
DOIs
Publication statusPublished - 1998 Jan 1
EventProceedings of the 1998 19th Biennial Conference of the International Association on Water Quality. Part 1 (of 9) - Vancouver, Can
Duration: 1998 Jun 211998 Jun 26

Keywords

  • Biofilm
  • Biological wastewater treatment
  • Phenolic wastewater
  • Suspended sludge
  • Three-phase fluidized bed

ASJC Scopus subject areas

  • Environmental Engineering
  • Water Science and Technology

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