title: Steady state model for evaluation of external and internal mass transfer effects in an immobilized biofilm.
abstract: A steady model for the evaluation of external liquid film diffusion and internal pore diffusion effects in an immobilized biofilm system under continuous mode of operation was developed. The model takes into account, substrate diffusion through external liquid film and biofilm. Average rate of substrate consumption in the biofilm was considered. The overall efficiency of the biofilm was mathematically represented by considering the combined effects of substrate penetration and substrate utilization in the biofilm. The model was illustrated using a case study of pyridine biodegradation in a rotating biological contactor immobilized with pyridine degrading microbial film. The model is able to effectively predict both internal and external mass transfer effects in an immobilized biofilm system.
authors.affiliation: Environmental Biotechnology Division, National Environmental Engineering Research Institute (CSIR), Nehru Marg, Nagpur 440020, India. sn_mudliar@neeri.res.in
authors.forename: Sandeep
authors.initials: S
authors.lastname: Mudliar
authors.forename: Saumita
authors.initials: S
authors.lastname: Banerjee
authors.forename: Atul
authors.initials: A
authors.lastname: Vaidya
authors.forename: Sukumar
authors.initials: S
authors.lastname: Devotta
mesh_terms: D018441:Biofilms; D003198:Computer Simulation; D004058:Diffusion; D007700:Kinetics; D008954:Models, Biological; D016062:Porosity; D011725:Pyridines / Q000302:isolation & purification; D013379:Substrate Specificity
chemical_list: D011725:Pyridines; C023666:pyridine