General assessment of potential CSO reduction by means of real time control

1995 ◽  
Vol 32 (1) ◽  
pp. 249-257 ◽  
Author(s):  
Michael Jørgensen ◽  
Wolfgang Schilling ◽  
Poul Harremoës
Keyword(s):  
Real Time ◽  
Case Studies ◽  
Control Strategies ◽  
Systematic Investigation ◽  
Optimum Control ◽  
Real Time Control ◽  
General Applicability ◽  
Time Control ◽  
Sewer Systems ◽  
Combined Sewer

A number of case studies have been carried out in which the potential reduction of combined sewer overflows (CSO) by means of real time control (RTC) is assessed for existing sewer systems. It is an inherent problem of case studies that results cannot necessarily be generalized. In this paper results of a systematic investigation of hypothetical combined sewer systems are presented. The systems were characterized in terms of their topological structure, size, type and arrangement of storage and transport elements. The RTC optimization model LOCUS was applied to simulate the performance of local control and of optimum control strategies. The results are expressed as “CSO reduction achieved by optimum control, compared to the locally controlled system”. General conclusions are drawn with respect to possible CSO reduction for a system with given topology, storage and transport characteristics. Finally, these are compared to some case studies reported in the literature in order to verify and show the general applicability of the findings.

Pollution based real time control strategies for combined sewer systems

1997 ◽  
Vol 36 (8-9) ◽  
pp. 331-336 ◽  
Author(s):  
Gabriela Weinreich ◽  
Wolfgang Schilling ◽  
Ane Birkely ◽  
Tallak Moland
Keyword(s):  
Real Time ◽  
Control Strategies ◽  
Ammonia Nitrogen ◽  
Simple Extension ◽  
Real Time Control ◽  
Time Control ◽  
Sewer Systems ◽  
Receiving Waters ◽  
Tunnel System

This paper presents results from an application of a newly developed simulation tool for pollution based real time control (PBRTC) of urban drainage systems. The Oslo interceptor tunnel is used as a case study. The paper focuses on the reduction of total phosphorus Ptot and ammonia-nitrogen NH4-N overflow loads into the receiving waters by means of optimized operation of the tunnel system. With PBRTC the total reduction of the Ptot load is 48% and of the NH4-N load 51%. Compared to the volume based RTC scenario the reductions are 11% and 15%, respectively. These further reductions could be achieved with a relatively simple extension of the operation strategy.

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.

Real Time Control within a Combined Sewer System: Comparison of Practical and Theoretical Results

1993 ◽  
Vol 27 (5-6) ◽  
pp. 123-132 ◽  
Author(s):  
Michael. Weyand
Keyword(s):  
Real Time ◽  
Control Strategies ◽  
Practical Investigations ◽  
Water Runoff ◽  
Real Time Control ◽  
Combined Sewer Overflows ◽  
Model Calculations ◽  
Detention Tank ◽  
Time Control ◽  
Combined Sewer

Application of real time control systems within sewer networks is one of different possible measures taken against the problems with storm water runoff and combined sewer overflows (CSO) in urbanized areas. Practical investigations concerning the effect of this alternative way to reduce CSO have been made during four years in the sewer network of the community Ense-Bremen (near Dortmund). An implemented simple control strategy manages the flow and storage events aiming at an even degree of storage capacity at any detention tank and at any time. The comparison with model calculations, reveals that there are differences between both results especially those concerning the basin out-flows. These differences are mainly caused by the constraints of practical operation. Therefore it is necessary to develop control strategies considering these facts within its practical course.

Effet de la propagation non linéaire des débits sur le contrôle en temps réel des débordements de réseaux unitaires

1989 ◽  
Vol 16 (2) ◽  
pp. 119-123
Author(s):  
Lucie Wilson ◽  
Denis Isabel ◽  
Jean-Pierre Villeneuve
Keyword(s):  
Real Time ◽  
Linear Models ◽  
Control Strategies ◽  
Real Time Control ◽  
Sewer System ◽  
Prediction Horizon ◽  
Time Control ◽  
Combined Sewer ◽  
Combined Sewer System ◽  
Propagation Non Linéaire

A number of reports on simulations of real-time control of combined sewer system runoff have been published. Most of the control strategies suggested use linear models to calculate discharge routing. We used a nonlinear model for discharge routing and some of our findings differ from those obtained in earlier studies. In particular, it appears that the prediction horizon used for control optimization could be favourably shorter than the time of system flow-through. Key words: combined sewer system overflow, real-time control, nonlinear programming, discharge propagation. [Journal translation]

Sign in / Sign up

Export Citation Format

Share Document