A5076199709- Wastewater Treatment and Nitrogen Removal
- Constructed Wetlands for Wastewater Treatment
- Membrane Separation Technologies
- Fault Detection and Control Systems
- Water Quality Monitoring Technologies
- Water Quality Monitoring and Analysis
- Water Systems and Optimization
- Water Treatment and Disinfection
- Advanced Control Systems Optimization
- Ammonia Synthesis and Nitrogen Reduction
- Analytical Chemistry and Sensors
- Water-Energy-Food Nexus Studies
- Groundwater flow and contamination studies
- Advanced Chemical Sensor Technologies
- Wireless Sensor Networks for Data Analysis
- Fluid Dynamics and Mixing
- Reservoir Engineering and Simulation Methods
- Anaerobic Digestion and Biogas Production
- Water resources management and optimization
- Sensor Technology and Measurement Systems
- Phosphorus and nutrient management
- Microbial Fuel Cells and Bioremediation
- Scientific Measurement and Uncertainty Evaluation
- Environmental Monitoring and Data Management
- Energy Harvesting in Wireless Networks
Solutions Inc. (Japan)
2015-2018
EnviroSim (Canada)
2010-2013
Energy and Environmental Consultancy
2010-2013
Swiss Federal Institute of Aquatic Science and Technology
2002-2012
Université Laval
2008-2011
Polytechnique Montréal
2006-2010
Montreal Biodome
2006
École Polytechnique Fédérale de Lausanne
2001
Mathematical modelling of activated sludge systems is used widely for plant design, optimisation, training, controller design and research. The quality simulation studies varies depending on the project objectives, finances expertise available. Consideration has to be given model accuracy amount time required carrying out a study produce desired accuracy. Inconsistent approaches insufficient documentation make assessment comparison results difficult or almost impossible. A general framework...
Originally presented at the 1st IWA/WEF Wastewater Treatment Modelling Seminar (WWTmod 2008), this contribution has been updated to also include valuable feedback that was received during Seminar. This paper addresses a number of basic issues concerning modelling nitrite in key processes involved biological wastewater water treatment. To end, we review different model concepts (together with structures and corresponding parameter sets) proposed for such as two-step...
A guideline for simulation studies of wastewater treatment plants is proposed. The aim the HSG-guideline to define a reference quality level that helps make results comprehensible and comparable therefore increases reliability mathematical modelling in treatment. paper gives summary HSG-guideline, written by group university members from Germany, Austria Switzerland.
An in-situ UV spectrometer was applied to the effluent of a WWTP in Switzerland and calibrated using multivariate calibration algorithm based on PLS regression. Except for nitrite, comparative measurements plant laboratory. Samples made stock solution added three different matrices prepared EAWAG laboratory were used nitrite because concentrations always range 0.06–0.26 mg/l. The results show very good precision nitrate. measuring COD DOC not completely covered by measurements, so...
This paper serves as a problem statement of the issues surrounding uncertainty in wastewater treatment modelling. The proposes structure for identifying sources introduced during each step an engineering project concerned with model-based design or optimisation system. It briefly references methods currently used to evaluate prediction accuracy and discusses relevance evaluations model applications. aims raise awareness initiate comprehensive discussion among professionals on issues. also...
Many unit process models are available in the field of wastewater treatment. All these use their own notation, causing problems for documentation, implementation and connection different (using sets state variables). The main goal this paper is to propose a new notational framework which allows unique systematic naming variables parameters biokinetic treatment field. symbols based on one letter that gives general description variable or parameter several subscript levels provide greater...
ABSTRACT: Aeration control at wastewater treatment plants based on ammonia as the controlled variable is applied for one of two reasons: (1) to reduce aeration costs, or (2) peaks in effluent ammonia. limitation has proven result significant energy savings, may external carbon addition, and can improve denitrification biological phosphorus (bio‐P) performance. Ammonia limiting been mainly feedback constrain complete nitrification by maintaining approximately milligrams nitrogen per liter...
Model results are only as good the data fed input or used for calibration. Data reconciliation wastewater treatment modeling is a demanding task, and standardized approaches lacking. This paper suggests procedure to obtain high‐quality sets model‐based studies. The proposed approach starts with collection of existing historical data, followed by planning additional measurements reliability checks, step, it ends an intensive measuring campaign. With suggested method, should be possible...
The Good Modelling Practice Task Group (GMP-TG) of the International Water Association (IWA) is developing guidelines for use Activated Sludge Models (ASM). As part this work group created and sent out a questionnaire to current potential activated sludge model users in 2007. objectives were (i) better define profile ASM users, (ii) identify tools procedures that are actually used (iii) highlight main limitations while building using ASM-type models. Ninety-six answers received from all over...
Aeration consumes about 60% of the total energy use a wastewater treatment plant (WWTP) and therefore is major contributor to its carbon footprint. Introducing advanced process control can help plants reduce their footprint at same time improve effluent quality through making available unused capacity for denitrification, if ammonia concentration below certain set-point. Monitoring concepts are cost-saving alternatives extension reactor volume. However, they also involve risk violation...
Several methods to detect faults have been developed in various fields, mainly chemical and process engineering. However, minimal practical guidelines exist for their selection application. This work presents an index that allows evaluating monitoring diagnosis performance of fault detection methods, which takes into account several characteristics, such as false alarms, acceptance, undesirable switching from correct non-detection during a event. The usefulness the engineering is...
This study aims at synthesizing experiences in the practical application of ASM type models. The information is made easily accessible to model users by creating a database modelling projects. includes answers questionnaire that was sent out 2008 provide inputs for Scientific and Technical Report IWA Task Group on Good Modelling Practice – Guidelines use activated sludge models, literature review published analysed determine which biokinetic parameters are usually changed modellers, ranges,...
Abstract The wastewater industry is currently facing dramatic changes, shifting away from energy-intensive treatment towards low-energy, sustainable technologies capable of achieving energy positive operation and resource recovery. latter will shift the focus to how one could manage extract resources wastewater, as opposed conventional paradigm treatment. Debatable questions arise: can more complex models be calibrated, or additional unknowns introduced? After almost 30 years using...
Abstract Gas–liquid mass transfer in wastewater treatment processes has received considerable attention over the last decades from both academia and industry. Indeed, improvements modelling gas–liquid can bring huge benefits terms of reaction rates, plant energy expenditure, acid–base equilibria greenhouse gas emissions. Despite these efforts, there is still no universally valid correlation between design operating parameters a coefficients. That why current practice for oxygen to apply...
Combined nitritation–denitritation and biological phosphorus removal from real wastewater was achieved for more than 400 days without chemical addition.
In this paper, we propose a statistical theoretical framework for incorporation of sensor and actuator faults in dynamic simulations wastewater treatment operation. Sensor failures are often neglected control strategy development testing, although it is well known that they represent significant obstacle realising at full-scale facilities. The incorporating based on Markov chains displays the appealing property easy transition history into model fault generation. paper briefly describes...
Abstract Ammonia-based aeration control (ABAC) is a cascade concept for controlling total ammonia nitrogen (NHx-N) in the activated sludge process. Its main goals are to tailor intensity NHx-N loading and maintain consistent nitrification, meet effluent limits but minimize energy consumption. One limitation ABAC that solids retention time (SRT) strategy used at water resource recovery facility (WRRF) may not be with of ABAC. ABAC-SRT aligning ammonia-based SRT control. A supervisory...
Three calibration methods were applied to UV/VIS spectra recorded in the influent of six wastewater treatment plants (WWTPs) measure total COD (CODtot), filtered (CODfil), nitrate and nitrite nitrogen (NOx-N) suspended solids (TSS). It could be shown that a sensor using data sets from four Swiss WWTPs leads an improvement precision comparison global provided by manufacturer. A specific matrix always improves results gives highest accuracy. For CODtot mean coefficient variation CVx 12.5%...
During the design of a water resource recovery facility, it is becoming industry practice to use simulation software assist with process design. Aeration one key components activated sludge process, and most important aspects modelling wastewater treatment systems. However, aeration systems are typically not modelled in detail studies. A comprehensive dynamic system model has been developed that captures both air supply demand. The includes sub-models for blowers, pipes, fittings, valves. An...