Balancing Waste Water Treatment Plant Load Using Branch and Bound

Book chapter (2020)

Authors

R.R.P. van Nooijen Water Resources -

A.G. Kolechkina Team Bart De Schutter - Mechanical, Maritime and Materials Engineering

Research Group

Water Resources () (TU Delft)

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Published Date

2020

Language

English

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Faculty

Civil Engineering & Geosciences

Department

Water Management

Research Group

Water Resources

Abstract

The problem of smoothing dry weather inflow variations for a Waste Water Treatment Plant (WWTP) that receives sewage from multiple mixed sewer systems is formulated. A first rough control algorithm that uses branch and bound is presented. The control algorithm uses a form of Model Predictive Control. Trials showed that the algorithm had trouble satisfying two constraints that were initially regarded as ‘soft’ constraints. As a result, a closer look was taken at the feasibility of the problem. A family of simpler problems were derived to do so. These auxiliary problems made it possible to show that for a given subclass feasibility was strongly dependent on the choice of problem parameters.