title: Biomass characterization by dielectric monitoring of viability and oxygen uptake rate measurements in a novel membrane bioreactor.
abstract: The application of permittivity and oxygen uptake rate (OUR) as biological process control parameters in a wastewater treatment system was evaluated. Experiments were carried out in a novel airlift oxidation ditch membrane bioreactor under different organic loading rates (OLR). Permittivity as representative of activated sludge viability was measured by a capacitive on-line sensor. OUR was also measured as a representative for respirometric activity. Results showed that the biomass concentration increases with OLR and all biomass related measurements and simulators such as MLSS, permittivity, OUR, ASM1 and ASM3 almost follow the same increasing trends. The viability of biomass decreased when the OLR was reduced from 5 to 4 kg COD m(-3)d(-1). During decreasing of OLR, biomass related parameters generally decreased but not in a similar manner. Also, protein concentration in the system during OLR decreasing changed inversely with the activated sludge viability.
authors.affiliation: School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran; IEM, Université Montpellier 2, F-34095 Montpellier, France.
authors.forename: Farshid Pajoum
authors.initials: FP
authors.lastname: Shariati
authors.forename: Marc
authors.initials: M
authors.lastname: Heran
authors.forename: Mohammad Hossein
authors.initials: MH
authors.lastname: Sarrafzadeh
authors.forename: Mohammad Reza
authors.initials: MR
authors.lastname: Mehrnia
authors.forename: Gabriele
authors.initials: G
authors.lastname: Sarzana
authors.forename: Charles
authors.initials: C
authors.lastname: Ghommidh
authors.forename: Alain
authors.initials: A
authors.lastname: Grasmick
mesh_terms: D000332:Aerobiosis; D057919:Biological Oxygen Demand Analysis; D018533:Biomass; D019149:Bioreactors / Q000382:microbiology*; D004560:Electricity; D008567:Membranes, Artificial; D050296:Microbial Viability; D010084:Oxidation-Reduction; D010100:Oxygen / Q000378:metabolism*; D012722:Sewage / Q000382:microbiology; D013997:Time Factors; D014835:Volatilization
chemical_list: D008567:Membranes, Artificial; D012722:Sewage; D010100:Oxygen