Improving nutrient removal while reducing energy use at three Swiss WWTPs using advanced control. Water Environment Research
Abstract: Aeration consumes about 60% of the total energy use of a wastewater treatment plant (WWTP) and therefore is a major contributor to its carbon footprint. Introducing advanced process control can help plants to reduce their carbon footprint and at the same time improve effluent quality through making available unused capacity for denitrification, if the ammonia concentration is below a certain set-point. Monitoring and control concepts are cost-saving alternatives to the extension of reactor volume. However, they also involve the risk of violation of the effluent limits due to measuring errors, unsuitable control concepts or inadequate implementation of the monitoring and control system. Dynamic simulation is a suitable tool to analyze the plant and to design tailored measuring and control systems. During this work, extensive data collection, modeling and fullscale implementation of aeration control algorithms were carried out at three conventional activated sludge plants with fixed pre-denitrification and nitrification reactor zones. Full-scale energy savings in the range of 16–20% could be achieved together with an increase of total nitrogen removal of 40%.
Related articles
-
Ammonia-based aeration control with optimal SRT control: improved performance and lower energy consumption Proceedings ICA2017
Abstract: Ammonia-based aeration control (ABAC) is a cascade control concept for controlling total ammonia nitrogen (NHx-N) in the activated sludge process. Its main goals are to tailor the aeration ...
-
Process Control Systems at Water Resource Recovery Facilities: Use of Process Simulation to Assist with Controller Design and Tuning. Proceedings ISA2017
Abstract: Process simulation is a useful tool to assist with control design and tuning at water resource recovery facilities (WRRFs). Simulation models serve as virtual WRRFs which can be used to ...
-
Development of a model for activated sludge aeration systems: Linking air supply, distribution, and demand. Proceedings WWTmod2016
Abstract: During the design of a wastewater treatment plant (WWTP), it is becoming industry practice for engineers to use simulation software to assist with process design. Aeration is one of the key ...
-
Model-Supported Design, Testing, and Implementation of Process Control Strategies. in: Smart Water Utilities: Complexity Made Simple
Abstract: Advanced process control has the ability to allow the full performance potential of your wastewater treatment plant to be realized by taking advantage of existing but unused capacities. In ...
Customer comments
No comments were found for Improving nutrient removal while reducing energy use at three Swiss WWTPs using advanced control. Water Environment Research. Be the first to comment!