Modelling biological processes in water treatment: The integrated biofiltration model

Bruce Rittmann, Douglas Stilwell

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Biofiltration is a form of biofilm process used to make drinking waters biologically stable, which means that the water does not support excessive bacterial growth when it is distributed. Biofiltration avoids the many quality problems associated with biological instability: high chlorine doses, disinfection by-products, accelerated corrosion, taste and odours, high turbidity, and increased plate counts or coliforms. Most designs of biofilters have been empirical. However, using a mechanistic model as a design tool can improve process reliability and the effectiveness of pilot and laboratory studies on biofiltration. Unfortunately, models that include the critical phenomena have been quite complex; they are good research tools, but are not easily used for routine design and analysis. The Integrated Biofilm Model (IBM) is a spreadsheet program that includes all the key phenomena for biofiltration of drinking water, but is simple to use. Specifically included in the model are the consumption and production of chemical species (input substrates, end products and soluble microbial products); heterotrophic and nitrifying bacteria; inert biomass; physical processes, such as transport and detachment; and the relationships between all of the different organisms and chemical species. An example shows the inputs to the model and the kind of trends that it predicts for original substrates, soluble microbial products, and biofilm biomass. The IBM makes iterative design and analysis of biofiltration processes straightforward.

Original languageEnglish (US)
Pages (from-to)1-14
Number of pages14
JournalJournal of Water Supply: Research and Technology - AQUA
Volume51
Issue number1
StatePublished - 2002
Externally publishedYes

Fingerprint

Biofiltration
biofiltration
Water treatment
biological processes
water treatment
Biofilms
biofilm
modeling
Potable water
Biomass
drinking water
Biofilters
substrate
nitrifying bacterium
spreadsheet
Disinfection
Spreadsheets
biomass
Odors
Turbidity

Keywords

  • Biodegradable organic matter
  • Biofilm
  • Biofiltration
  • Detachment
  • Nitrification
  • Soluble microbial products

ASJC Scopus subject areas

  • Water Science and Technology
  • Civil and Structural Engineering

Cite this

Modelling biological processes in water treatment : The integrated biofiltration model. / Rittmann, Bruce; Stilwell, Douglas.

In: Journal of Water Supply: Research and Technology - AQUA, Vol. 51, No. 1, 2002, p. 1-14.

Research output: Contribution to journalArticle

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