Wastewater treatment plants are large non-linear systems subject to
large perturbations in wastewater flow rate, load and composition.
Nevertheless these plants have to be operated continuously, meeting
stricter and stricter regulations. Many control strategies have
been proposed in the literature for improved and more efficient
operation of wastewater treatment plants. Unfortunately, their
evaluation and comparison - either practical or based on simulation
- is difficult. This is partly due to the variability of the
influent, to the complexity of the biological and biochemical
phenomena and to the large range of time constants (from a few
minutes to several days). The lack of standard evaluation criteria
is also a tremendous disadvantage. To really enhance the acceptance
of innovative control strategies, such an evaluation needs to be
based on a rigorous methodology including a simulation model, plant
layout, controllers, sensors, performance criteria and test
procedures, i.e. a complete benchmarking protocol. This book is a
Scientific and Technical Report produced by the IWA Task Group on
Benchmarking of Control Strategies for Wastewater Treatment Plants.
The goal of the Task Group includes developing models and
simulation tools that encompass the most typical unit processes
within a wastewater treatment system (primary treatment, activated
sludge, sludge treatment, etc.), as well as tools that will enable
the evaluation of long-term control strategies and monitoring tasks
(i.e. automatic detection of sensor and process faults). Work on
these extensions has been carried out by the Task Group during the
past five years, and the main results are summarized in
Benchmarking of Control Strategies for Wastewater Treatment Plants.
Besides a description of the final version of the already
well-known Benchmark Simulation Model no. 1 (BSM1), the book
includes the Benchmark Simulation Model no. 1 Long-Term (BSM1_LT) -
with focus on benchmarking of process monitoring tasks - and the
plant-wide Benchmark Simulation Model no. 2 (BSM2). Authors: Krist
V. Gernaey, Technical University of Denmark, Lyngby, Denmark, Ulf
Jeppsson, Lund University, Sweden, Peter A. Vanrolleghem,
Universite Laval, Quebec, Canada and John B. Copp, Primodal Inc.,
Hamilton, Ontario, Canada
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