title: Real-time optical monitoring of the wastewater treatment process.
abstract: One activated sludge process line was optically monitored in situ by a novel image analysis equipment. The results of the image analysis were studied to find out dependencies to the process variables of the wastewater treatment plant (WWTP) and to the quality of the treated wastewater. The quality parameter of the treated wastewater, suspended solids, was modelled using the image analysis results. The model can be used for evaluating the performance of the WWTP and for the better control for stable effluent quality. It was shown that the results of the online optical monitoring reveal useful information from the process and can be used in forecasting the quality of biologically treated wastewater. The optical monitoring method together with process measurements has an important role in keeping the process in stable operating conditions and avoiding environmental risks.
authors.affiliation: a Control engineering , University of Oulu , P.O.Box 4300, FI-90014 Oulu , Finland.
authors.forename: Jani
authors.initials: J
authors.lastname: Tomperi
authors.affiliation: b Fibre and Particle Engineering , University of Oulu , Oulu , Finland.
authors.forename: Elisa
authors.initials: E
authors.lastname: Koivuranta
authors.affiliation: c HSY Helsinki Region Environmental Services Authority , Helsinki , Finland.
authors.forename: Anna
authors.initials: A
authors.lastname: Kuokkanen
authors.affiliation: a Control engineering , University of Oulu , P.O.Box 4300, FI-90014 Oulu , Finland.
authors.forename: Esko
authors.initials: E
authors.lastname: Juuso
authors.affiliation: a Control engineering , University of Oulu , P.O.Box 4300, FI-90014 Oulu , Finland.
authors.forename: Kauko
authors.initials: K
authors.lastname: Leiviskä
mesh_terms: D005387:Finland; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D008962:Models, Theoretical; D061848:Optical Imaging; D012722:Sewage / Q000737:chemistry*; D062065:Wastewater / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
chemical_list: D012722:Sewage; D062065:Wastewater
keywords: activated sludge process; cross-validation; digital imaging; non-linear scaling; suspended solids