Improvement of activated sludge process using enhanced nonlinear PI controller
Wastewater treatment plant is a large-scale system and highly known with the nonlinearity of the parameters, making them a challenge to be controlled. In this paper, enhanced nonlinear PI (EN-PI) controller is developed for activated sludge process where a sector-bounded nonlinear gain with automa...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Springer
2014
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| Subjects: | |
| Online Access: | http://eprints.utem.edu.my/id/eprint/14167/1/AJSE.pdf http://eprints.utem.edu.my/id/eprint/14167/ |
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| Summary: | Wastewater treatment plant is a large-scale system and highly known with the nonlinearity of the parameters, making them a challenge to be controlled. In this paper,
enhanced nonlinear PI (EN-PI) controller is developed
for activated sludge process where a sector-bounded nonlinear gain with automatic gain adjustment is cascaded to conventional static-gain PI. The importance in controlling the dissolved oxygen concentration and the improvement of nitrogen removal process are discussed. The effectiveness of the proposed EN-PI controller is validated by comparing the performance of local control loops and the activated sludge process to the benchmark PI under three different weathers. The EN-PI controller is effectively applied in improving the performances of the static-gain PI, hence controlling the dynamic natures of the plant. Itwas proved by significant improvement
in effluent violations, effluent quality index and
energy saving of the Benchmark Simulation Model No.1. |
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