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Water Management, Civil Engineering and Geosciences

Onder het motto `samen, slim, schoon' ontwikkelen in Noord-Brabant enkele gemeenten, waterschappen en universiteiten innovatieve oplossingen voor een vernieuwende aanpak in de afvalwaterketen en het watersysteem. Een onderdeel hiervan is een geavanceerde modellering van procesonderdelen van de rioolwaterzuiveringsinstallatie. Deze modellering maakt op haar beurt deel uit van het KRW-innovatieproject KALLISTO, dat bijdraagt aan een doelmatig en duurzaam schonere rivier de Dommel. Het onderzoek loopt tot medio dit jaar in de regio Eindhoven., Water Management, Civil Engineering and Geosciences

Water Management, Civil Engineering and Geosciences

Onder het motto´Samen, Slim, Schoon´ ontwikkelen gemeenten, waterschappen en universiteiten oplossingen voor een vernieuwende aanpak in de afvalwaterketen en het watersysteem. Geavanceerde modellering van procesonderdelen van de rwzi maakt onderdeel uit van het KRW-innovatieproject KALLISTO dat bijdraagt aan een doelmatig en duurzaam schoner oppervlaktewater in rivier de Dommel., Water Management, Civil Engineering and Geosciences

Kallisto is a large scale research project at water board De Dommel in The Netherlands, in cooperation with several partners (Weijers et al, 2011). It consists of quantitative and qualitative continuous on line measurements and extended modelling of the WWTP (Waste Water Treatment Plant) Eindhoven, the contributing sewer systems and the river Dommel. The overall goal of the project is to optimise the performance of the total wastewater system by using impact based Real Time Control (RTC) in order to comply with the WFD (water framework directive)., Water Management, Civil Engineering and Geosciences

Distributed Temperature Sensing (DTS) with fiber-optic cables is a powerful tool to detect illicit connections in storm sewer systems. High frequency temperature measurements along the in-sewer cable create a detailed representation of temperature anomalies due to illicit discharges. The detection limits of the monitoring equipment itself are well-known, but there is little information available on detection limits for the discovery of illicit connections, as in sewers mixing and attenuation also plays an important role. This paper describes the results of full-scale experiments aiming to quantify the detection limits for illicit connections under various sewer conditions. Based on the results, a new monitoring setup for (partially) filled sewer conduits has been proposed., Water Management, Civil Engineering and Geosciences

Asset management is a prerequisite for maintaining the required level of serviceability of urban drainage systems. The required asset management effort to achieve a certain level of service is unclear due to sewer systems process and structure complexity. One of the main questions of asset management is what kind of information is needed, and how this information can be obtained. Sewer failure mechanisms explain the structural/operational failures of sewer elements. This study focuses on determining the information required to be able to detect and identify sewer failure mechanisms. In order to be able to identify the failure mechanisms involved, a HAZOP approach was applied. The main processes and defects responsible for the structural/operational failures of sewer elements were identified, as well as possibility of obtaining the information about them. This information will help in estimating the probability of failure occurrence and generally it will help defining the information needed for proper serviceability., Water Management, Civil Engineering and Geosciences

Rioleringsbeheer is een eerste vereiste om het gewenste niveau van functioneren van de riolering te behouden. Welke inspanning op het gebied van rioleringsbeheer nodig is om een bepaald niveau van functioneren te bereiken is onduidelijk, omdat zowel de processen in als de structuur van de rioolstelsels complex zijn. Een belangrijke vraag hierbij is welke informatie er nodig is en hoe deze informatie verkregen moet worden. Faaimechanismen van het rioolsysteem verklaren het structurele en operationele falen van onderdelen van het rioolsysteem. Deze studie richt zich op het vaststellen welke informatie er nodig is om faalmechanismen in de riolering op te sporen en te identificeren. Om het identificeren van de faalmechanismen mogelijk te maken, is gebruik gemaakt van de zogenaamde HAZOP (Hazard+OPerability) benadering. De belangrijkste processen en tekortkomingen verantwoordelijk voor het structurele en/of operationele falen van rioleringsonderdelen zijn geïdentificeerd, evenab de mogelijkheden om de ervoor benodigde informatie te verkrijgen. Deze informatie is nodig om de kans op een faalgebeurtenis te kunnen schatten en is uiteindelijk ook nodig om vast te stellen welke informatie nodig is voor goed functioneren van het systeem., Water Management, Civil Engineering and Geosciences

Sewer systems are costly to construct and even more costly to replace, requiring proper asset management Sewer asset management relies to a large extent on available information. In sewer systems where pipe corrosion is the dominant failure mechanism, visual inspection (CCTV) and core sampling are amongst the methods applied mostly to assess sewer pipe condition. This paper compares visual inspection and drill core analysis in order to enhance further understanding of the limitations and potentials of both methods. Both methods have been applied on a selected sewer reach in the city of the Hague, which was reportedly subject to pipe corrosion. Results show that both methods, visual inspection and core sampling, are associated with large uncertainties and that there is no obvious correlation between results of visual inspection and results of drill core analysis., Water Management, Civil Engineering and Geosciences

Civil Engineering and Geosciences

Civil Engineering and Geosciences

Wastewater systems consist of sewer systems and wastewater treatment works. As the performance of a wastewater treatment plant is affected by the characteristics, i.e. operation and design, of the contributing sewer systems, knowledge of the interactions between sewers and wastewater treatment works is very important when trying to understand and improve wastewater systems. The thesis comprises three main topics: Firstly, the sensitivity of wastewater treatment plant performance to influent fluctuations is discussed, based on both measurement data and model results. Secondly, the quality of model results achievable with state of the art sewer models are described for the most important in sewer processes. Finally, the impact of the interactions within the wastewater system on wastewater system performance is illustrated in a semi-hypothetical case study. The thesis concludes that knowledge on the interactions is not only essential with respect to understanding of wastewater system performance, but that this knowledge opens new ways of dealing with our existing wastewater infrastructure., Civil Engineering and Geosciences

Wastewater systems consist of sewer systems and wastewater treatment works. As the performance of a wastewater treatment plant is affected by the characteristics, i.e. operation and design, of the contributing sewer systems, knowledge of the interactions between sewers and wastewater treatment works is very important when trying to understand and improve wastewater systems. The thesis comprises three main topics: Firstly, the sensitivity of wastewater treatment plant performance to influent fluctuations is discussed, based on both measurement data and model results. Secondly, the quality of model results achievable with state of the art sewer models are described for the most important in sewer processes. Finally, the impact of the interactions within the wastewater system on wastewater system performance is illustrated in a semi-hypothetical case study. The thesis concludes that knowledge on the interactions is not only essential with respect to understanding of wastewater system performance, but that this knowledge opens new ways of dealing with our existing wastewater infrastructure., Civil Engineering and Geosciences