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Grey box modelling in two time domains of a wastewater pilot scale plant
Author(s) -
Carstensen J.,
Madsen Henrik,
Poulsen Niels Kjølstad,
Nielsen Marinus K.
Publication year - 1993
Publication title -
environmetrics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.68
H-Index - 58
eISSN - 1099-095X
pISSN - 1180-4009
DOI - 10.1002/env.3170040204
Subject(s) - wastewater , sewage treatment , environmental science , pilot plant , nonlinear system , scale (ratio) , biological system , biochemical engineering , environmental engineering , engineering , waste management , physics , quantum mechanics , biology
Wastewater treatment processes are characterized by the existence of many different biochemical and physical processes, which partly can be controlled through operation of the wastewater treatment plant. Time series models of these processes are very useful for gaining insight into real time operation of wastewater treatment systems which deal with variable influent flows and pollution loads. In this paper nonlinear time series models based on knowledge of the processes are established. Rates of the biochemical and hydraulic processes are identified, and by statistical methods these constants for the biochemical processes are estimated assuming Monod kinetics. The models are solely based on on‐line measurements of ammonia and nitrate concentrations and corresponding controlling signals from a wastewater pilot scale plant. The models only include those hydraulic and kinetic parameters which have been shown to be significant in a statistical sense, and hence can be quantified.