Conference Agenda

Overview and details of the sessions of this conference. Please select a date or location to show only sessions at that day or location. Please select a single session for detailed view (with abstracts and downloads if available).

Session Overview
Date: Thursday, 25/Aug/2022
8:00am - 8:50amRegistration 2: Registration and Welcome Coffee
Location: Foyer BMT
8:50am - 10:20amPlenary 7: Emerging Issues and New Technologies 2 - Approaches and Techniques
Location: Lecture Hall BMT
Session Chair: Thomas Walter Ertl
8:50am - 9:10am

Future of Food Waste Disposers: what is the potential for energy recovery at wastewater treatment plants?

Abigail Legge, Henriette Jensen, Andy Nichols, Simon Tait, Richard Ashley

University of Sheffield, United Kingdom

Foodwaste disposers provide a disposal route for consumers that could contribute to circular economy opportunities. This eliminates handling of foodwaste and makes use of existing anaerobic digestion facilities at many treatment works. During in-sewer transport organic matter is utilised by heterotrophic microorganisms. The amount of organic matter that will be turned into CO2 during in-sewer transport needs to be estimated to understand the energy recovery potential. A mass balance can be used to estimate how much anaerobic digestion can be boosted by foodwaste. The presented experiments determine the COD of food waste and the rate of in-sewer degredation.

9:10am - 9:30am

Experimental evaluation of the storm water control performance of a modular blue roof in Mediterranean climate.

Alberto Campisano, Aurora Gullotta, Carlo Modica, Fabrizio Musmeci

University of Catania, Italy

The paper discusses results of the long-term monitoring of a full-scale pilot installation of a modular blue roof (BR) for the control of the runoff from the roof terrace of a building in the campus of the University of Catania (Italy). The BR was installed in one catchment of the rooftop while another symmetrical catchment was left unmodified and monitored to allow comparison. Results of the analysis have shown average 54% retention efficiency and 72% detention efficiency of the BR. The BR always overperformed the conventional roof, with mean 34% runoff reduction and mean 60% flow peak attenuation.

9:30am - 9:50am

From household inflows to the WRRF: modelling thermal-hydraulic dynamics with a hybrid framework

Alejandro Figueroa, Bruno Hadengue, Jörg Rieckermann

Eawag, The Swiss Federal Institute of Aquatic Science and Technology, Switzerland

We present a framework based on WaterHub, MINUHET and SWMM-HEAT that enables thermal-hydraulic simulations from household inflows to the wastewater resource recovery facility. We validate the framework with real-world data across seasons and precipitation events. In addition, we analyse how decentralized heat recovery devices impact wastewater temperatures at the WRRF during precipitation events.

9:50am - 10:10am

Automatic generation and design of realistic sewer networks based on open access data

Julian David Reyes-Silva, Diego Novoa, Björn Helm, Peter Krebs

TU Dresden, Germany

Data for the proper development of urban drainage models is not always available or accessible. To overcome this, several approaches have focused on generating virtual UDNs with similar properties as real systems. However, they are not adequate to analyze local processes (e.g. urban flooding), since they generate systems with generic layouts or properties. In this context, the present work focuses on developing a tool to automatically generate and design more realistic sewer networks based on open access data. Results suggest that the tool is able to generate drainage systems with realistic hydraulic and spatial characteristics

10:20am - 10:50amBreak 3: Coffee Break
Location: Foyer BMT
10:50am - 12:00pmPlenary 8: Emerging Issues and New Technologies 3 - SARS-CoV 2
Location: Lecture Hall BMT
Session Chair: Darko Joksimovic
10:50am - 11:10am

Whole campus wastewater surveillance of SARS-CoV-2 for COVID-19 outbreak management

Yehonatan Sharaby, Yael Gilboa, Yuval Alfiya, Sara Sabach, Uta Cheruti, Eran Friedler

Technion - Israel Institute of Technology

In this long-term study students’ accommodation in the Technion were monitored through wastewater surveillance. Results were used to create a ‘traffic-light’ scheme allowing the Technion’s COVID-19 committee to follow the COVID-19 spread in the campus. 87.4% of the samples were negative for SARS-CoV-2 RNA while 11.5% were positive, corroborating morbidity information the COVID-19 committee had. 1.1% of the samples were positive, while the committee had no information about positive students. In these events, new cases were identified after students were tested for COVID-19. The study emphasises the importance of wastewater-based epidemiology for COVID-19 monitoring, and as an early warning system.

11:10am - 11:30am

Wastewater based epidemiology: deriving Omicron shedding rates from sewer data

jeroen langeveld1, johan post2, remy Schilperoort2, gertjan medema3

1tu delft; 2partners4urbanwater; 3kwr

Wastewater surveillance or wastewater based epidemiology (WBE) for SARS-CoV-2 has seen a rapid development since early 2020. Several authors have attempted to model the incidence data derived from the number of positive tests in formal testing facilities, using sewer data. In this abstract, we describe the research performed aiming to derive Omicron shedding rates based on sewer and incidence data.

11:30am - 11:50am

Passive Sampling for Sewage Surveillance: A review

Elnaz Karamati Niaragh1, Rebekah Henry1, Heather M Murphy2, Ilya Law2, Yussi Palacios Delgado1, David T McCarthy1

1Environmental and Public Health Microbiology Laboratory (EPHM Lab), Department of Civil Engineering, Monash University, Wellington Rd, Clayton, Victoria, 3810, Australia; 2Water, Health and Applied Microbiology Laboratory, Department of Pathobiology, University of Guelph

  • Passive sampling was an effective tool for detecting a range of pathogens in sewage.
  • Passive samplers have been progressively optimized for wastewater-based epidemiology.
  • Results of SARS-CoV-2 provide another step for promising applications of the passive sampler.
12:00pm - 12:30pmPlenary 9: Flash Presentations - Part 2
Location: Lecture Hall BMT
Session Chair: Simon Tait

(Sub-)Catchment delineation with different levels of geographical data: which effects on combined sewer overflow modelling?

Violeta A. Montoya-Coronado1, Leana Souillard1, Richard Gaubert1, Pascal Molle2, Damien Tedoldi1, Gislain Lipeme Kouyi1

1Institut National des Sciences Appliquées de Lyon (INSA Lyon), France; 2INRAE, Research Unit REVERSAAL, Lyon, France

The ability of Sustainable Urban Drainage Systems (SUDS) to mitigate Combined Sewer Overflows (CSO) is often studied through a catchment-scale modeling approach. Simulation accuracy depends on field data such as catchment and sub-catchment boundaries, and sewer system characteristics. The present study proposes a methodology for (sub-)catchment delineation depending on the available geographic information data. Four scenarios with increasing complexity of input data are proposed and tested in different urban catchments, followed by hydrological modeling to compare flow dynamics. Current results show a better estimation of total runoff volume when topography is available, even if the sewer network plans are unknown

Development of BANPOL model for water quality predictions in urban sewer system


Chungnam National University, Korea, Republic of (South Korea)

Most of hydrological models do not consider sewer effect on transport and fate of water and pollutants, respectively, and thus they have limited applicability in urban area with complicated sewer system. The BANPOL model was developed to strengthen water quality modelling capacity of SWMM especially for pervious area and also in the sewer or channel. The model also can provide boundary condition for dynamic surface water quality model such as EFDC while original SWMM only provides information on independent water quality variables. The model was successfully calibrated for flow rate and water quality in an urban stream

Forensic Sewer Process Modelling – Anticipating a Terrorist Attack

Matthew Ward1, Adrian Romero2, Jes Vollertsen3

1The WATS Guys, Inc., United States of America; 2Jacobs, United States of Ameria; 3University of Aalborg, Denmark

I was told by Mr. Konig to upload a .pdf version of my abstract. Why is there no option to do that? Also, the website explains that two page abstracts will be accepted. the 100 words allowed here is not two pages.

Spacio-temporal and multivariate calibration of an integrated urban wastewater model

Fernanda Mendes1, Frédéric Pierre2, Claude Valentin3, Thibaud Maruéjouls1

1SUEZ WATER FRANCE - LyRE, France; 2ODIVEA, Dijon Metropolitan water management company, France; 3Dijon Metropolitan, France

- Multi data type used for calibration: sensor and samples; minute, daily and yearly frequencies.

- Development of a specific multivariate-based aeration controller for activated sludge.

- A decision support tool identifying receiving water quality impacts of management decisions.

Better understanding in-sewer processes with on-site continuous mass spectrometric analysis of sewer gases

Mengqi Zhu1,2, Jörg Rieckermann1, Matthias Brennwald1, Jes Vollertsen3, Rolf Kipfer1,4,5

1Eawag, Swiss Federal Institute of Aquatic Science and Technology, 8600 Dübendorf, Switzerland; 2ETH Zürich, Institute of Environmental Engineering, 8093 Zürich, Switzerland; 3Aalborg University, Department of the Built Environment, 9220 Aalborg, Denmark; 4ETH Zürich, Institute of Biogeochemistry and Pollutant Dynamics, 8092 Zürich, Switzerland; 5ETH Zürich, Institute of Geochemistry and Petrology, ETH Zürich, 8092 Zürich, Switzerland

We performed continuous measurements of noble gases in sewers for the first time used a novel portable mass spectrometer. A case study regarding using noble gases as tracers to estimate groundwater infiltration showed the potentials of using miniRuedi on urban drainage tracing studies. Although the technology looks very promising in general, infiltration assessment is impacted by unknown boundary conditions, such as gas dilution in the headspace/ventilation.

12:30pm - 1:30pmLunch Break 2: Lunch Break - Buffet
Location: Foyer BMT
1:30pm - 3:00pmPlenary 10: Monitoring and Associated Technologies 2 - Data and Uncertainties
Location: Lecture Hall BMT
Session Chair: Francois Clemens
1:30pm - 1:50pm

Machine learning to improve understanding of pipe failures

Ehsan Kazemi, Will Shepherd, Simon Tait

University of Sheffield, United Kingdom

Historical data collected from a sewer network covering a town with a population of about 50k, with 180 km of predominantly combined sewers is analysed to understand potential causes of incidents, such as blockage and flooding, on the network. For this purpose, Machine Learning (ML) models are developed to identify the major relationships between different elements of the system, and then estimate the risk of incidents through quantifying the identified relationships. This risk relationship can be used to plan pro-active inspection of pipes to reduce the likelihood of failures occurring.

1:50pm - 2:10pm

Using centrality measures, network cross k-function and geographically weighted regression as decision support for operational issues and redesigning sewers

Emmanuel Okwori, Maria Viklander, Annelie Hedstrom

Lulea University of Technology, Sweden

The topology of Sanitary Sewer Networks (SSNs) can play an influential role in the occurrence and magnitude of operational failures such as blockages and basements flooding. It could be argued that the spatial behaviour of operational failures may be related to the topology of SSNs. This article explored this argument by investigating the spatial association between the location of recurrent blockages and influential nodes within the network topology using centrality measures and the network cross-K-function. Results from a preliminary application to the SSN of one municipality (total network length 500 km, »40 people/km) using its historical blockage data are presented.

2:10pm - 2:30pm

Image Based Quantification of Solids Transport and Transformation Processes in Sewer Pipes

Yonatan Zohar, Roni Penn

Technion – Israel Institute of Technology, Israel

  • Establishment of an innovative imaged based experimental set up for the quantification of sewer solids transport and transformation processes.
  • Erosion was found as the major disintegration process of faeces. The erosion rate increased with the increase of flow velocity and water content of the solid.
  • The minimum flow velocity from which the solids were stationary and hardly disintegrated was 0.22 m/s, highlighting the potential of implementing water efficient solutions.

2:30pm - 2:50pm

How reusable are your data? - Towards truly FAIR open data for urban drainage

Jörg Rieckermann1, Pierre Lechevallier1, Jon Agustsson2, Luca Rossi3, Simon Tait4

1Swiss Federal Institute of Aquatic Science and Technology (Eawag), Switzerland; 2Swiss Federal Institute of Technology Lausanne (EPFL); Switzerland; 3SINEF SA, Givisiez, Switzerland; 4The University of Sheffield, United Kingdom

Generating new insight from existing data is a major cornerstone of the scientific process. Re-using existing observations with a fresh idea, possibly including complementary datasets, may answer questions that the initial investigators did not even consider. Unfortunately, in the urban drainage area only very few Open Research Datasets (ORD) exist. Reusing observations in our field is challenging, among other things, because the required meta-data, e.g. on sensor calibration and maintenance, are lacking. In this contribution, we critically review some examples of urban drainage ORD. We find that bottlenecks are mostly concerned with the interoperability and the reusability of the data.

3:00pm - 3:30pmBreak 4: Coffee Break
Location: Foyer BMT
3:30pm - 4:40pmPlenary 11: In-Sewer Processes 2 - H2S
Location: Lecture Hall BMT
Session Chair: Roni Penn
3:30pm - 3:50pm

H2S control through an original channel

Gislain Lipeme, Gaëlle Ducom, Françoise Jolly, Pierre Buffiere

UNIV LYON, INSA LYON, DEEP, 69621 Villeurbanne, France

Hydrogen sulphide (H2S) is one of the most common gases encountered in gravity sewers. It causes odour nuisance and is also dangerous for humans. It can have serious consequences on the health of sewage workers. In this paper a nature-based solution favouring the release of H2S and its filtration in an original channel is proposed and is evaluated through CFD modelling approach.The proposed channel operates in a proper way. The hydraulic jump increases the turbulent kinetic energy leading to the massive release of H2S. Then natural ventilation directs the air to the filter.

3:50pm - 4:10pm

Liquid H2S Online Measurement for Optimized Sewer System Insights and H2S Control

Marie INIZAN1, Tim ALIG2

1Hach, France; 2Hach, USA

In order to prevent corrosion in the collection system and prevent public complaints caused by nuisance odours, water utilities use chemicals to mitigate hydrogen sulfide (H2S). By dynamically adjusting the chemical dosing rate to match real-time liquid-phase H2S concentrations from an online sensor, the effectiveness of ferrous sulfate (FeSO4) dosing at the end-of-pipe improved while chemical consumption dropped by 50%.

4:10pm - 4:30pm

Continuous measurement of dissolved sulphide in sewers

Esther Vollertsen1, Yansi Jesuloganathan2, Bo Snediker Jacobsen2, Jes Vollertsen3

1EnviDan A/S; 2Aarhus Water A/S; 3Aalborg University, Denmark

The city of Aarhus, Denmark, with its 400,000 PE and its 1,632 km of sewers, experiences odour and corrosion problems. These have intensified over the last decades as wastewater treatment has been centralized, combined systems converted to separate ones, and water consumption has declined. In this presentation, a catchment-wide measuring campaign of pH and dissolved H2S gas (using SulfiLoggerTM) is presented, and benefits and issues related to the approach discussed. Finally, the applicability for calibrating a sewer process model, Mega-WATS, is touched on.

4:40pm - 6:00pmPoster Session: Poster Session with cash bar
Location: Foyer BMT
7:00pm - 8:00pmSocial Event 4: Guided City Tour
Location: Meeting Point Guided City Tour

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