Balancing water quality and flows in combined sewer systems using real-time control

2020 ◽  
Vol 6 (5) ◽  
pp. 1357-1369
Author(s):  
Sara C. Troutman ◽  
Nancy G. Love ◽  
Branko Kerkez
Keyword(s):  
Water Quality ◽  
Control Algorithm ◽  
Treatment Plant ◽  
Source Control ◽  
Collection System ◽  
Real Time Control ◽  
Time Control ◽  
Sewer Systems ◽  
System P ◽  
Combined Sewer

An open-source control algorithm for combined sewers demonstrates how treatment plant benefits can be balanced with operation of the collection system.

scholarly journals Real-time control of sewer systems using turbidity measurements

2011 ◽  
Vol 63 (11) ◽  
pp. 2628-2632 ◽  
Author(s):  
C. Lacour ◽  
M. Schütze
Keyword(s):  
Real Time ◽  
Measurement Techniques ◽  
Quality Characteristics ◽  
Water Quantity ◽  
Urban Drainage ◽  
Data Sets ◽  
Real Time Control ◽  
Time Control ◽  
Sewer Systems ◽  
Combined Sewer

Real-time control (RTC) of urban drainage systems has been proven useful as a means to reduce pollution by combined sewer overflow discharges. So far, RTC has been investigated mainly with a sole focus on water quantity aspects. However, as measurement techniques for pollution of wastewater are advancing, pollution-based RTC might be of increasing interest. For example, turbidity data sets from an extensive measurement programme in two Paris catchments allow a detailed investigation of the benefits of using pollution-based data for RTC. This paper exemplifies this, comparing pollution-based RTC with flow-based RTC. Results suggest that pollution-based RTC indeed has some potential, particularly when measurements of water-quality characteristics are readily available.

Model reduction through boundary relocation to facilitate real-time control optimisation in the integrated urban wastewater system

2002 ◽  
Vol 45 (4-5) ◽  
pp. 373-381 ◽  
Author(s):  
J. Meirlaen ◽  
P.A. Vanrolleghem
Keyword(s):  
Water Quality ◽  
Model Reduction ◽  
Real Time ◽  
Treatment Plant ◽  
Model Complexity ◽  
Urban Wastewater ◽  
Real Time Control ◽  
Sewer System ◽  
Time Control ◽  
The Impact

Real time control is one of the possibilities to minimise the impact of the integrated urban wastewater system (sewer system and treatment plant) on the receiving water quality. Integrated control uses information about the river state to act in the sewer system or in treatment plant. In order to test and tune these integrated controllers, a simplified integrated model is needed. Even with these simplified models, the simulation times may be too long and further model reduction is needed. In this paper, dependency-structure based model reduction is proposed as a technique to further reduce model complexity. Three steps are proposed: relocation of the upstream system boundaries to just upstream of the first control point, relocation of the downstream boundaries to just downstream of the last measurement point, and third, a further model simplification based on an analysis of the sensitivity of the control actions on submodel elimination. The effect of applying the different reduction approaches on the control strategy and on the resulting river water quality is discussed on the basis of a case study of the catchment of Tielt.

Real time control of the integrated urban wastewater system using simultaneously simulating surrogate models

2002 ◽  
Vol 45 (3) ◽  
pp. 109-116 ◽  
Author(s):  
J. Meirlaen ◽  
J. Van Assel ◽  
P. A. Vanrolleghem
Keyword(s):  
Water Quality ◽  
Real Time ◽  
River Water ◽  
Control Strategy ◽  
Treatment Plant ◽  
River Water Quality ◽  
Urban Wastewater ◽  
Real Time Control ◽  
Time Control

The urban wastewater system (sewer and treatment plant) has a major impact on the river water quality of urban streams. To minimise this impact, real time control is a valuable option. Since the ultimate goal of any control strategy is to optimise the quality of the river system, it is useful to take pollutant immissions into account when determining the control strategy and/or the setpoints of the controller. However, a simultaneously simulating model of the complete system is needed in order to allow design and evaluation of such control strategies. In this work an integrated model of the urban wastewater system is created. This has been accomplished by implementing surrogate models of the three subsystems within a single software platform. The coupled submodels are subsequently used in a semi-hypothetical case study to optimise the resulting river water quality. An ammonia sensor in the river has been used to control the amount of water treated biologically in the treatment plant. It was shown that this integrated control could lower the peak ammonia concentration in the part of the river downstream of the treatment plant. Hence, a proof of principle has been given that the use of measurements in the river to perform control actions in the sewer system and the treatment plant is a promising option.

Integrated urban drainage, status and perspectives

2002 ◽  
Vol 45 (3) ◽  
pp. 1-10 ◽  
Author(s):  
P. Harremös
Keyword(s):  
Water Reuse ◽  
Local Treatment ◽  
Treatment Plant ◽  
Management Policy ◽  
Source Control ◽  
Integrated Analysis ◽  
Real Time Control ◽  
Adequate Knowledge ◽  
Time Control ◽  
Storm Drainage

This paper summarises the status of urban storm drainage as an integrated professional discipline, including the management-policy interface, by which the goals of society are implemented. The paper assesses the development of the discipline since the INTERURBA conference in 1992 and includes aspects of the papers presented at the INTERURBA-II conference in 2001 and the discussions during the conference. Tools for integrated analysis have been developed, but there is less implementation than could be expected. That is due to lack of adequate knowledge about important mechanisms, coupled with a significant conservatism in the business. However, significant integrated analyses have been reported. Most of them deal with the sewer system and the treatment plant, while few incorporate the receiving water as anything but the object of the loads to be minimised by engineering measures up-stream. Important measures are local infiltration, source control, storage basins, local treatment and real time control. New paradigms have been introduced: risk of pollution due to system failure, technology for water reuse, sustainability, new architecture and greener up-stream solutions as opposed to down-stream concrete solutions. The challenge is to combine the inherited approaches with the new approaches by flexibility and adaptability.

The effect of organic reactions in a collection system on wastewater treatment plant performance

1995 ◽  
Vol 31 (7) ◽  
pp. 25-31 ◽  
Author(s):  
Bruce Gall ◽  
Imre Takács ◽  
Gilles Patry
Keyword(s):  
Water Quality ◽  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Numerical Experiments ◽  
Treatment Plant ◽  
Quality Characteristics ◽  
Plant Performance ◽  
Collection System ◽  
Combined Sewer ◽  
Potential Benefits

Biological reactions within the sewer play an important role in establishing the water quality characteristics of combined sewer overflow and of the sewage entering a wastewater treatment plant. A simulation model that shows the effects of reactions in the collection system on wastewater treatment plant performance has been developed. A series of numerical experiments was conducted to illustrate the features of the model, and the potential benefits of the approach. The study also serves to identify areas in which the models need to be improved.

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