Integrated modelling as an analytical and optimisation tool for urban watershed management

2002 ◽  
Vol 46 (6-7) ◽  
pp. 141-150 ◽  
Author(s):  
V. Erbe ◽  
T. Frehmann ◽  
W.F. Geiger ◽  
P. Krebs ◽  
J. Londong ◽  
...  
Keyword(s):  
Standard Procedure ◽  
Treatment Plant ◽  
Systems Design ◽  
Integrated Approach ◽  
Integrated Modelling ◽  
State Variables ◽  
Upstream Direction ◽  
Wastewater Systems ◽  
Set Up ◽  
Receiving Water

In recent years numerical modelling has become a standard procedure to optimise urban wastewater systems design and operation. Since the models were developed for the subsystems independently, they did not support an integrated view to the operation of the sewer system, the wastewater treatment plant (WWTP) and the receiving water. After pointing out the benefits of an integrated approach and the possible synergy effects that may arise from analysing the interactions across the interfaces, three examples of modelling case studies carried out in Germany are introduced. With these examples we intend to demonstrate the potential of integrated models, though their development cannot be considered completed. They are set up with different combinations of self-developed and commercially available software. The aim is to analyse fluxes through the total wastewater system or to integrate pollution-based control in the upstream direction, that is e.g. managing the combined water retention tanks as a function of state variables in the WWTP or the receiving water. Furthermore the interface between the sewer and the WWTP can be optimised by predictive simulations such that the combined water flow can be maximised according to the time- and dynamics-dependent state of the treatment processes.

An integrated modelling concept for immission-based management of sewer system, wastewater treatment plant and river

2005 ◽  
Vol 52 (5) ◽  
pp. 95-103 ◽  
Author(s):  
V. Erbe ◽  
M. Schütze
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Treatment Plant ◽  
Integrated Modelling ◽  
Urban Drainage ◽  
State Variables ◽  
Quality Model ◽  
Sewer System ◽  
Effective Measure ◽  
Receiving Water

Today's planning standards deal with the individual urban drainage components (sewer system, wastewater treatment plant and receiving water) separately, i.e. they are often designed and operated as single components. As opposed to this, an integral handling considers the drainage components jointly. This novel approach allows a holistic and more sustainable planning of urban drainage systems. This paper presents an integrated modelling concept. The aim is to analyse fluxes through the total wastewater system and to integrate pollution-based control in the upstream direction, that is, e.g., managing the combined water retention tanks as a function of state variables in the WWTP or the receiving water. All models of the different subsystems are based on the Activated Sludge Model (ASM) concept of IWA, including River Water Quality Model No. 1 (RWQM). Simulations can be done in truly parallel mode using the simulation environment SIMBA. The integrated modelling concept is applied to the river Dhuenn and the urban wastewater system of the municipality of Odenthal (Germany). An optimised operation of the system using RTC proves to be a very effective measure.

scholarly journals Integrated operation of sewer system and WWTP by simulation-based control of the WWTP inflow

2005 ◽  
Vol 52 (5) ◽  
pp. 195-203 ◽  
Author(s):  
K. Seggelke ◽  
K.-H. Rosenwinkel ◽  
P. A. Vanrolleghem ◽  
P. Krebs
Keyword(s):  
Standard Procedure ◽  
Dynamic Control ◽  
Systems Design ◽  
Actual State ◽  
Sewer System ◽  
Simulation Based ◽  
Integrated Operation ◽  
Wastewater Systems ◽  
On Line ◽  
Receiving Water

In recent years numerical modelling became a standard procedure to optimise urban wastewater systems design and operation by integration. For dynamic control of the wastewater teatment plant (WWTP) inflow, a model-based predictive concept is introduced aiming at improving the receiving water quality. An on-line simulator running parallel to the real WWTP operation reflects the actual state of operation and provides this model information to a prognosis tool which determines the best option for the WWTP inflow. The investigations showed that it is possible to reduce the NH4-N peak concentrations in the receiving water by dynamic WWTP inflow control based on predictive scenario analysis.

Integrated modelling: comparison of state variables, processes and parameters in sewer and wastewater treatment plant models

1997 ◽  
Vol 36 (5) ◽  
pp. 373-380 ◽  
Author(s):  
C. Fronteau ◽  
W. Bauwens ◽  
P.A. Vanrolleghem
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Treatment Plant ◽  
Drainage System ◽  
Integrated Modelling ◽  
Urban Drainage ◽  
State Variables ◽  
Sewer System ◽  
Wastewater Treatment Process ◽  
Urban Drainage System

All the parts of an urban drainage system, i.e. the sewer system, the wastewater treatment plant (WWTP) and the river, should be integrated into one single model to assess the performance of the overall system and for the development of design and control strategies assisting in its sustainable and cost effective management. Existing models for the individual components of the system have to be merged in order to develop the integrated tool. One of the problems arising from this methodology is the incompatibility of state variables, processes and parameters used in the different modelling approaches. Optimisation of an urban drainage system, and of the wastewater treatment process in particular, requires a good knowledge of the wastewater composition. As important transformations take place between the emission from the household and the arrival at the treatment facility, sewer models should include these transformations in the sewer system. At present, however, research is still needed in order to increase our knowledge of these in-sewer processes. A comparison of the state variables, processes and parameters has been carried out in both sewer models (SMs) and activated sludge models (ASMs). An ASM approach is used for the description of reactions in sewer models. However, a difference is found in the expression for organic material (expressed in terms of BOD) and heterotrophic biomass is absent as a state variable, resulting in differences in processes and parameters. Reconciliation of both the models seems worthwhile and a preliminary solution is suggested in this paper.

Modelling and monitoring of integrated urban wastewater systems: review on status and perspectives

2013 ◽  
Vol 68 (6) ◽  
pp. 1203-1215 ◽  
Author(s):  
Lorenzo Benedetti ◽  
Jeroen Langeveld ◽  
Adrien Comeau ◽  
Lluís Corominas ◽  
Glen Daigger ◽  
...  
Keyword(s):  
Systems Analysis ◽  
Integrated Management ◽  
Treatment Plant ◽  
Water Systems ◽  
Integrated Modelling ◽  
Water Quantity ◽  
Urban Water ◽  
Integrated Models ◽  
Urban Wastewater ◽  
Wastewater Systems

While the general principles and modelling approaches for integrated management/modelling of urban water systems already present a decade ago still hold, in recent years aspects like model interfacing and wastewater treatment plant (WWTP) influent generation as complements to sewer modelling have been investigated and several new or improved systems analysis methods have become available. New/improved software tools coupled with the current high computational capacity have enabled the application of integrated modelling to several practical cases, and advancements in monitoring water quantity and quality have been substantial and now allow the collecting of data in sufficient quality and quantity to permit using integrated models for real-time applications too. Further developments are warranted in the field of data quality assurance and efficient maintenance.

Ranking strategies for stormwater management under uncertainty: sensitivity analysis

1997 ◽  
Vol 36 (5) ◽  
pp. 357-371 ◽  
Author(s):  
A.L.L. Reda ◽  
M.B. Beck
Keyword(s):  
Water Quality ◽  
Wastewater Treatment ◽  
Model Uncertainty ◽  
Treatment Plant ◽  
Oxygen Demand ◽  
Integrated Approach ◽  
Urban Environments ◽  
Real Time Control ◽  
Ammonium N ◽  
Receiving Water

The disadvantageous consequences of stormwater perturbations of receiving water quality in urban environments can be attenuated by exercising control at various locations across the sewer network, wastewater treatment plant, and the stream itself. As part of a long-standing programme of research on developing an integrated approach to the management and real-time control of water quality in river basins, the paper examines the sensitivity of the associated strategies to model uncertainty. Specifically, results are presented for a case study based on a 10km stretch of the River Cam as it passes through the city of Cambridge in eastern England. The options for control are restricted to design and operational features of the wastewater treatment facility. Assessment is according to maximum and cumulative values of mass flows of ammonium-N and biochemical oxygen demand, together with the duration of dissolved oxygen concentration below 4.0 gm−3, at the downstream boundary of the system. A straightforward analysis of the sensitivity of these criteria to changes in the parameterisation of a model for receiving water quality shows that the ranking of strategies is robust in the face of model uncertainty. Minor differences in ranking occur as a function of whether judgement is based on ammonium-N or the other two attributes of water quality and whether attention is focused on the treatment plant in isolation or performance across the system as a whole. However, such conclusions must be qualified by noting that our analysis has been limited in its scope and elementary in its treatment of uncertainty.

Municipal Wastewater Systems, Integrated Approach to Design, Monitoring and Control

1994 ◽  
Vol 29 (1-2) ◽  
pp. 419-426 ◽  
Author(s):  
P. Harremoës ◽  
T. Hvitved-Jacobsen ◽  
A. Lynggaard-Jensen ◽  
B. Nielsen
Keyword(s):  
Real Time ◽  
Large Scale ◽  
Municipal Wastewater ◽  
Treatment Plant ◽  
Integrated Approach ◽  
Oxygen Depletion ◽  
Monitoring And Control ◽  
Real Time Control ◽  
Time Control ◽  
Wastewater Systems

A city and several companies joined in a large scale project with the aim to introduce real time control of the sewer system and the wastewater treatment plant. The basic goals were established from the receiving water studies, and essentially represent constraints on the total nutrient discharge causing eutrophication of a fjord and limits on oxygen depletion by combined sewer overflows in the small upstream rivers. The paper describes the basic principles and approaches for the real time control in urban wastewater systems.

A practical application of integrated urban pollution modelling in Flanders (Belgium): the catchment of Tielt

2002 ◽  
Vol 45 (3) ◽  
pp. 125-129 ◽  
Author(s):  
J. Van Assel ◽  
R. Carrette
Keyword(s):  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Urban Pollution ◽  
Integrated Modelling ◽  
Pilot Studies ◽  
Innovation Project ◽  
Water Courses ◽  
Set Up ◽  
The Impact

In view of a European Innovation Project (DG XIII) on the application of the Urban Pollution Management (UPM) procedure, a European consortium was set up to carry out pilot studies in Belgium, France, Ireland, Italy and Portugal. On the Belgian pilot catchment of Tielt the impact from sewer system and sewage treatment plant (STP) on the receiving water courses was studied for both the existing situation and for a number of possible improvement schemes, using the Intermittent Standards, described in the UPM procedure. The integrated modelling revealed some interesting conclusions on the relative impact of the schemes considered.

Optimisation and control of the inflow to a wastewater treatment plant using integrated modelling tools

1998 ◽  
Vol 37 (1) ◽  
pp. 347-354 ◽  
Author(s):  
Ole Mark ◽  
Claes Hernebring ◽  
Peter Magnusson
Keyword(s):  
Wastewater Treatment ◽  
Real Time ◽  
Wastewater Treatment Plant ◽  
Treatment Plant ◽  
Pilot Project ◽  
Integrated Modelling ◽  
Real Time Control ◽  
Sewer System ◽  
Time Control ◽  
The Impact

The present paper describes the Helsingborg Pilot Project, a part of the Technology Validation Project: “Integrated Wastewater” (TVP) under the EU Innovation Programme. The objective of the Helsingborg Pilot Project is to demonstrate implementation of integrated tools for the simulation of the sewer system and the wastewater treatment plant (WWTP), both in the analyses and the operational phases. The paper deals with the programme for investigating the impact of real time control (RTC) on the performance of the sewer system and wastewater treatment plant. As the project still is in a very early phase, this paper focuses on the modelling of the transport of pollutants and the evaluation of the effect on the sediment deposition pattern from the implementation of real time control in the sewer system.

Impacts of separate rejection water treatment on the overall plant performance

2003 ◽  
Vol 48 (4) ◽  
pp. 139-146 ◽  
Author(s):  
B. Wett ◽  
J. Alex
Keyword(s):  
Water Treatment ◽  
Treatment Plant ◽  
Operating Experience ◽  
Plant Performance ◽  
High Tech ◽  
State Variables ◽  
Total N ◽  
Unit Process ◽  
Innovative Tool ◽  
The Impact

A separate rejection water treatment appears as a high-tech unit process which might be recommendable only for specific cases of an upgrading of an existing wastewater treatment plant. It is not the issue of this paper to consider a specific separate treatment process itself but to investigate the influence of such a process on the overall plant performance. A plant-wide model has been applied as an innovative tool to evaluate effects of the implemented sidestream strategy on the mainstream treatment. The model has been developed in the SIMBA environment and combines acknowledged mathematical descriptions of the activated sludge process (ASM1) and the anaerobic mesophilic digestion (Siegrist model). The model's calibration and validation was based on data from 5 years of operating experience of a full-scale rejection water treatment. The impact on the total N-elimination efficiency is demonstrated by detailed nitrogen mass flow schemes including the interactions between the wastewater and the sludge lane. Additionally limiting conditions due to dynamic N-return loads are displayed by the model's state variables.

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