Real-time control-oriented quality modelling in combined urban drainage networks

Abstract Urban drainage networks (UDN) carry urban wastewater to wastewater treatment plants (WWTP) in order to regenerate it before releasing it to the environment. Combined UDN (CUDN) carry both rain and wastewater together, which can overload the UDN and produce combined sewer overflows (CSO) that pollute the environment. Management of CUDN is receiving increasing attention from both researchers and water managers, in order to meet the high quality standards required for water and environment according to EU Water Framework Directive. Due to the complex dynamics of water quality, integrated control of CUDN and WWTP considering both flows and quality of the conveyed wastewater is a difficult problem. In order to design a real-time control (RTC) taking into account hydraulic and quality variables, the use of conceptual quality models is considered as a suitable option. This paper mainly presents a simplified conceptual quality modelling approach to represent the dynamics of suspended solid in sewers of CUDN oriented to real-time control. A sewer simulator implemented in SWMM (Storm Water Management Model) integrated with a lumped conceptual model for total suspended solid (TSS) is used for calibration and validation. A real example of Perinot sewer network is used as a case study. Discussions about RTC implementation in CUDN are also provided in this paper, where Model Predictive Control (MPC) is proposed as the suitable method to control the integrated water and quality models in CUDN as future motivation.

[1]  Rasmus Wiuff.  Transport of suspended material in open and submerged streams , 1985 .

[2]  P A Vanrolleghem,et al.  A phenomenological retention tank model using settling velocity distributions. , 2012, Water research.

[3]  Jean-Luc Bertrand-Krajewski.  Modélisation du transport solide en réseau d'assainissement unitaire : le modèle HYPOCRAS , 1993 .

[4]  Hunter Rouse,et al.  Nomogram for the settling velocity of spheres , 1938 .

[5]  Manfred Schütze,et al.  Integrating simulation models with a view to optimal control of urban wastewater systems , 2005, Environ. Model. Softw..

[6]  Ghassan Chebbo,et al.  Storm water quality modelling, an ambitious objective? , 1998 .

[7]  I. D. Cluckie,et al.  Modelling large urban drainage systems in real time , 1999 .

[8]  Guangtao Fu,et al.  Optimal Distribution and Control of Storage Tank to Mitigate the Impact of New Developments on Receiving Water Quality , 2010 .

[9]  L. Rijn.  Sediment Transport, Part II: Suspended Load Transport , 1984 .

[10]  Min Xu,et al.  Model reduction in model predictive control of combined water quantity and quality in open channels , 2013, Environ. Model. Softw..

[11]  J. Nash,et al.  River flow forecasting through conceptual models part I — A discussion of principles☆ , 1970 .

[12]  G Cembrano,et al.  Predictive optimal control of sewer networks using CORAL tool: application to Riera Blanca catchment in Barcelona. , 2009, Water science and technology : a journal of the International Association on Water Pollution Research.

[13]  Martin Pleau,et al.  Global optimal real-time control of the Quebec urban drainage system , 2005, Environ. Model. Softw..

[14]  Nicanor Quijano,et al.  Modeling and real-time control of urban drainage systems: A review☆ , 2015 .

[15]  Wayne C. Huber,et al.  Deterministic Modeling of Urban Runoff Quality , 1986 .

[16]  M. Schuetze,et al.  Real time control (RTC) of urban drainage systems – A discussion of the additional efforts compared to conventionally operated systems , 2013 .

[17]  Vincent Rocher,et al.  Priority pollutants in wastewater and combined sewer overflow. , 2008, The Science of the total environment.

[18]  Carlos Ocampo-Martinez,et al.  Minimization of Sewage Network Overflow , 2013, Water Resources Management.

[19]  Gabriela Cembrano,et al.  Optimal control of urban drainage systems. A case study , 2004 .

[20]  Upaka Rathnayake.  Multi-objective Optimization of Combined Sewer Systems Using SWMM 5.0 , 2015 .

[21]  Ian Cluckie,et al.  A novel approach to the real-time modelling of large urban drainage systems , 1997 .

[22]  Marjolaine Métadier,et al.  Traitement et analyse de séries chronologiques continues de turbidité pour la formulation et le test de modèles des rejets urbains par temps de pluie , 2011 .

[23]  Peter A. Vanrolleghem,et al.  Modelling and real-time control of the integrated urban wastewater system , 2005, Environ. Model. Softw..

[24]  Günter Leugering,et al.  Real-Time Control of Urban Drainage Systems , 2012 .

[25]  Peter Ackers,et al.  Sediment Transport: New Approach and Analysis , 1973 .