A5013220803- Wastewater Treatment and Nitrogen Removal
- Water Quality Monitoring Technologies
- Membrane Separation Technologies
- Water Quality Monitoring and Analysis
- Water Systems and Optimization
- Water resources management and optimization
- Phosphorus and nutrient management
- Soil and Water Nutrient Dynamics
- Industrial Automation and Control Systems
- Wireless Sensor Networks for Data Analysis
- Water-Energy-Food Nexus Studies
- Advanced Control Systems Optimization
- Constructed Wetlands for Wastewater Treatment
- Potato Plant Research
- Multi-Criteria Decision Making
- Fisheries and Aquaculture Studies
- Salmonella and Campylobacter epidemiology
- Drilling and Well Engineering
- Fluid Dynamics and Mixing
- Transboundary Water Resource Management
- Wastewater Treatment and Reuse
- Fault Detection and Control Systems
- Water Treatment and Disinfection
- Quality and Safety in Healthcare
- Advanced Data Processing Techniques
Capital Region of Denmark
2021
Grundfos (Denmark)
2014
Veolia (Denmark)
2004-2006
Danfoss (Denmark)
2001-2003
Lund University
2002-2003
Technical University of Denmark
1994
Key developments of instrumentation, control and automation (ICA) applications in wastewater systems during the past 40 years are highlighted this paper. From first ICA conference 1973 through to today there has been a tremendous increase understanding processes, computer theory. However, many have not addressed here, such as sewer control, drinking water treatment distribution control. It is hoped that review can stimulate new attempts more effectively apply coming years.
The control of the nitrate recirculation flow in a predenitrification system is addressed. An elementary mass balance analysis on utilisation efficiency influent biodegradable COD (bCOD) for removal indicates that problem can be broken down into two parts: maintaining "anoxic" zone anoxic (i.e. present throughout zone) and maximising usage soluble bCOD denitrification. Simulation studies using Benchmark developed European COST program show both objectives achieved by concentration at outlet...
As the largest single energy-consuming component in most biological wastewater treatment systems, control of aeration is great interest seen from an energy savings point view. This paper suggests a simple way using on-line ammonium measurements to pre-denitrification plant by controlling dissolved oxygen setpoint. The controller works primarily feed-forward based on sensor located at head aerobic process part. Using online in-situ directly have important advantage over effluent that there no...
Background: In Denmark, large-scale waterborne outbreaks are rare. This report describes the investigation of an outbreak that occurred in town Køge May 2010. Methods: The epidemiological consisted hypothesis generating telephone interviews, followed by a cohort study among approximately 20,000 residents using online questionnaire. Odds ratios were calculated for exposures including number glasses tap water consumed. Geographical spreading was assessed geographical information system....
Including a reactive settler model in wastewater treatment plant allows representation of the biological reactions taking place sludge blanket settler, something that is neglected many simulation studies. The idea including investigated for an ASM1 case study. Simulations with whole non-reactive Takács are used as reference, and compared to results considering two models. first return block removing oxygen user-defined fraction nitrate, combined settler. second fully model. predicted 15.3%...
The biological phosphorus removal process is often implemented at plants by the construction of an anaerobic bio-p tank in front traditional N removing plant configuration. However, also observed configurations constructed only for nitrogen and simultaneous or post-precipitation. operational experience with this “accidental” mixed quite a lot frustration, as seems to come go hence behaves uncontrollably. aim work develop ways intentionally exploiting use instrumentation, control automation...
An operational space map is an efficient tool to compare a large number of strategies find optimal choice setpoints based on multicriterion. Typically, such multicriterion includes weighted sum cost operation and effluent quality. Due the relative high aeration definition optimality result in relatively fraction total nitrogen form ammonium. Such strategy may however introduce risk into because low degree ammonium removal leads amount nitrifiers. This turn reduced ability reject event...
In-situ nutrient sensors are now a proven technology. Having ion membranes eliminates the need for ultrafiltration, and consequently can be located at suitable places in any of reactors. This gives potential new control structures nitrification, denitrification, phosphorus removal. In paper some examples such controllers demonstrated as used full-scale wastewater treatment plant. A successful implementation scheme plants includes three steps: monitoring, experimenting controlling. The...
Nutrient sensors that can be located directly in the activated sludge processes are gaining number at wastewater treatment plants. The situ location of means they close to aim control and hence perfectly suited for automatic process control. Compared analysers effluent from sedimentation reactors a large reduction response time. settlers typically work as first-order delay on signal with retention time range 4-12 hours depending size settlers. Automatic nitrogen phosphorus removal...
This paper reviews decision support methodologies that can be applied to treatment plants. Case studies of systems (DSS) have been developed and used or trialled are presented below. These include rule-based based on digraphs cause-and-effect relationships. Detection examples real plant data presented, in one case using direct measurements simple detectors another multivariate statistics clustering.
Aeration tank settling is a control method allowing in the process during high hydraulic load. The patented. has been applied several waste water treatment plants using present design of tanks. Some designs have shown to be more effective than others. To improve less plants, computational fluid dynamics (CFD) modelling hydraulics and sedimentation applied. This paper discusses results at one particular plant experiencing problems with partly short-circuiting inlet outlet causing disruption...
In this paper, a control strategy for introducing enhanced biological phosphorus removal (EBPR) in an alternating plant designed nitrogen (EBNR) is presented. Alternating aerobic and anaerobic conditions to promote EBPR are provided by controlling the phases of operational cycle, instead separate volume. By utilising schemes already built STAR® system removal, fully integrated system. The relies on on-line measurements (ammonia and/or nitrate) orthophosphate. has been implemented full-scale...
A model for the description of SS distribution in a full-scale recirculating activated sludge WWTP was developed. The model, based on conservation principles, uses on-line plant data as inputs, and provides prediction load inlet to secondary clarifiers outputs. calibrated produces excellent predictions clarifiers, an essential variable operation aeration tank settling (ATS) process. case study illustrated how can be used evaluate potential benefit ATS implementation WWTP. reduction maximum...
Benchmarking is an effective tool to compare the performance of full-scale wastewater treatment plant operation. In this study, 29 plants from eight countries were surveyed with aim developing some key indicators, which may be used for benchmarking purposes. The level utilisation instrumentation, control and automation (ICA) has also been measured. study ICA revealed that on average only 23% all sensors are online control. For most parameters, not single dominant factor determining...