Effects of biofilm structure, microbial distributions and mass transport on biodegradation processes

Paul L. Bishop, Tian C. Zhang, Yun Chang Fu

Research output: Contribution to journalArticle

109 Citations (Scopus)

Abstract

The influence of biofilm structure on transport and transformation processes in biofilms has been investigated microscopically using microelectrodes, a micro-slicing procedure and various chemical and microbiological tests. The study demonstrates that the biofilm structure is highly stratified, characterized by an increase of biofilm density, a decrease of metabolically active biomass, and a decrease of porosity with biofilm depth. Both the effective diffusivity for dissolved oxygen and the effectiveness factor decrease with biofilm depth. Competition for substrate and space in biofilms results in this stratified structure, which is also affected by biofilm thickness. The study reveals that there am different trends for the density increase and the decreases of porosity, microbial activity and DO effective diffusivity with biofilm depth for different biofilm thicknesses. The results of this study are helpful in obtaining a clearer physical description of biofilms, and help to bridge the gap between the mathematical modelling and extemal-pbenomenon observation of biofilm systems.

Original languageEnglish (US)
Pages (from-to)143-152
Number of pages10
JournalWater Science and Technology
Volume31
Issue number1
DOIs
StatePublished - Jan 1 1995

Fingerprint

Biofilms
mass transport
Biodegradation
biofilm
biodegradation
Mass transfer
diffusivity
distribution
effect
Porosity
porosity
Microelectrodes
Dissolved oxygen
Density (specific gravity)
microbial activity
dissolved oxygen
Biomass

Keywords

  • Biofilm
  • biological activity
  • density
  • diffusion coefficient
  • effective diffusivity
  • mass transport
  • microbial distribution
  • oxygen
  • phospholipid
  • porosity

ASJC Scopus subject areas

  • Environmental Engineering
  • Water Science and Technology

Cite this

Effects of biofilm structure, microbial distributions and mass transport on biodegradation processes. / Bishop, Paul L.; Zhang, Tian C.; Fu, Yun Chang.

In: Water Science and Technology, Vol. 31, No. 1, 01.01.1995, p. 143-152.

Research output: Contribution to journalArticle

@article{344c47201c5647c1b6b413cee5d88069,
title = "Effects of biofilm structure, microbial distributions and mass transport on biodegradation processes",
abstract = "The influence of biofilm structure on transport and transformation processes in biofilms has been investigated microscopically using microelectrodes, a micro-slicing procedure and various chemical and microbiological tests. The study demonstrates that the biofilm structure is highly stratified, characterized by an increase of biofilm density, a decrease of metabolically active biomass, and a decrease of porosity with biofilm depth. Both the effective diffusivity for dissolved oxygen and the effectiveness factor decrease with biofilm depth. Competition for substrate and space in biofilms results in this stratified structure, which is also affected by biofilm thickness. The study reveals that there am different trends for the density increase and the decreases of porosity, microbial activity and DO effective diffusivity with biofilm depth for different biofilm thicknesses. The results of this study are helpful in obtaining a clearer physical description of biofilms, and help to bridge the gap between the mathematical modelling and extemal-pbenomenon observation of biofilm systems.",
keywords = "Biofilm, biological activity, density, diffusion coefficient, effective diffusivity, mass transport, microbial distribution, oxygen, phospholipid, porosity",
author = "Bishop, {Paul L.} and Zhang, {Tian C.} and Fu, {Yun Chang}",
year = "1995",
month = "1",
day = "1",
doi = "10.1016/0273-1223(95)00162-G",
language = "English (US)",
volume = "31",
pages = "143--152",
journal = "Water Science and Technology",
issn = "0273-1223",
publisher = "IWA Publishing",
number = "1",

}

TY - JOUR

T1 - Effects of biofilm structure, microbial distributions and mass transport on biodegradation processes

AU - Bishop, Paul L.

AU - Zhang, Tian C.

AU - Fu, Yun Chang

PY - 1995/1/1

Y1 - 1995/1/1

N2 - The influence of biofilm structure on transport and transformation processes in biofilms has been investigated microscopically using microelectrodes, a micro-slicing procedure and various chemical and microbiological tests. The study demonstrates that the biofilm structure is highly stratified, characterized by an increase of biofilm density, a decrease of metabolically active biomass, and a decrease of porosity with biofilm depth. Both the effective diffusivity for dissolved oxygen and the effectiveness factor decrease with biofilm depth. Competition for substrate and space in biofilms results in this stratified structure, which is also affected by biofilm thickness. The study reveals that there am different trends for the density increase and the decreases of porosity, microbial activity and DO effective diffusivity with biofilm depth for different biofilm thicknesses. The results of this study are helpful in obtaining a clearer physical description of biofilms, and help to bridge the gap between the mathematical modelling and extemal-pbenomenon observation of biofilm systems.

AB - The influence of biofilm structure on transport and transformation processes in biofilms has been investigated microscopically using microelectrodes, a micro-slicing procedure and various chemical and microbiological tests. The study demonstrates that the biofilm structure is highly stratified, characterized by an increase of biofilm density, a decrease of metabolically active biomass, and a decrease of porosity with biofilm depth. Both the effective diffusivity for dissolved oxygen and the effectiveness factor decrease with biofilm depth. Competition for substrate and space in biofilms results in this stratified structure, which is also affected by biofilm thickness. The study reveals that there am different trends for the density increase and the decreases of porosity, microbial activity and DO effective diffusivity with biofilm depth for different biofilm thicknesses. The results of this study are helpful in obtaining a clearer physical description of biofilms, and help to bridge the gap between the mathematical modelling and extemal-pbenomenon observation of biofilm systems.

KW - Biofilm

KW - biological activity

KW - density

KW - diffusion coefficient

KW - effective diffusivity

KW - mass transport

KW - microbial distribution

KW - oxygen

KW - phospholipid

KW - porosity

UR - http://www.scopus.com/inward/record.url?scp=0029030719&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0029030719&partnerID=8YFLogxK

U2 - 10.1016/0273-1223(95)00162-G

DO - 10.1016/0273-1223(95)00162-G

M3 - Article

AN - SCOPUS:0029030719

VL - 31

SP - 143

EP - 152

JO - Water Science and Technology

JF - Water Science and Technology

SN - 0273-1223

IS - 1

ER -