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Updated: May 1, 2026
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Comparison of Scale in a Photosynthetic Reactor System for Algal Remediation of Wastewater
Published on: March 6, 2017
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Lessons learnt from evaluating full-scale ammonium feedback control in three large wastewater treatment plants
L Åmand1, C Laurell2, K Stark-Fujii3
1IVL Swedish Environmental Research Institute, P.O. Box 210 60, 100 31 Stockholm, Sweden E-mail: linda.amand@ivl.se; Department of Information Technology, Uppsala University, P.O. Box 337, 751 05 Uppsala, Sweden.
Summary
This study evaluated ammonium feedback controllers in Swedish wastewater treatment plants to enhance monitoring, water quality, and energy savings. Long-term experiments are crucial, and comparing energy use via airflow measurements is challenging.
Area of Science:
- Environmental Engineering
- Water Treatment Technologies
- Process Control
Background:
- Wastewater treatment plants (WWTPs) face challenges in optimizing operational efficiency.
- Ammonium feedback control is a key strategy for improving WWTP performance.
- Evaluating control strategies requires robust, long-term data.
Purpose of the Study:
- To assess the effectiveness of different ammonium feedback controllers in full-scale WWTPs.
- To improve process monitoring and effluent water quality.
- To evaluate energy-saving potential of various control strategies.
Main Methods:
- Full-scale implementation and long-term evaluation of ammonium feedback controllers across three Swedish WWTPs.
- Comparative analysis of controller performance.
- Discussion on methodologies for energy assessment in control strategy comparison.
Main Results:
- Demonstrated the feasibility of implementing advanced ammonium feedback controllers in large-scale WWTPs.
- Provided insights into the impact of controllers on process stability and effluent quality.
- Highlighted challenges in accurately assessing energy consumption for control strategy comparison.
Conclusions:
- Long-term operational experiments are essential for reliable evaluation of control strategies.
- Direct measurement of airflow is an insufficient metric for comparing the energy efficiency of different control approaches.
- Optimizing ammonium feedback control can lead to significant improvements in WWTP operation.
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