Improvement of activated sludge process using enhanced nonlinear PI controller

Sharatul Izah, Sharatul Izah and Mohd Fua'ad , Rahmat and Norhaliza , Abdul Wahab and M.C, Razali and M.S. , Gaya and Syed Salim , Syed Najib (2014) Improvement of activated sludge process using enhanced nonlinear PI controller. Arab J Sci Eng, 39 (8). 6575-6586 . ISSN 1319-8025

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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.

Item Type: Article
Uncontrolled Keywords: enhanced nonlinear PI, activated sludge control, waste water treatment plant
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
T Technology > TD Environmental technology. Sanitary engineering
Divisions: Faculty of Electrical Engineering > Department of Control, Instrumentation & Automation
Depositing User: En. Syed Najib Syed Salim
Date Deposited: 30 Jan 2015 02:02
Last Modified: 28 May 2015 04:36
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