Measurement of the activity of a biofilm: Effects of surface loading and detachment on a three-phase, liquid-fluidized-bed reactor

B. E. Rittmann, F. Trinet, D. Amar, H. T. Chang

Research output: Contribution to journalConference articlepeer-review

36 Scopus citations

Abstract

A method to measure the fraction of biofilm bacteria active in respiration was developed and applied to a three-phase fluidized-bed biofilm reactor. The substrate flux (J) and the biofilm detachment coefficient (bs) were controlled independently. The experimental results showed that the amount of biofilm per unit of carrier surface area (XfLf) was controlled by J and bs. However, the biofilm's active fraction was proportional to J, but independent of bs for these experiments with relatively large bs values. When J was increased, the biofilm had less inactive biomass, because the substrate concentration was higher and allowed the cells to maintain a higher growth rate. Accompanying the increased activity were an increase in the observed biomass yield and a decrease in the oxygen consumption. These results provide a tool to control bioparticle fluidization, oxygen consumption, and sludge production.

Original languageEnglish (US)
Pages (from-to)585-594
Number of pages10
JournalWater Science and Technology
Volume26
Issue number3-4
DOIs
StatePublished - 1992
Externally publishedYes
EventProceedings of the 16th Biennial Conference of the International Association on Water Pollution Research and Control - Water Quality International '92 - Washington, DC, USA
Duration: May 24 1992May 30 1992

ASJC Scopus subject areas

  • Environmental Engineering
  • Water Science and Technology

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