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A Study on the Optimal Control Algorithms for the Advanced Wastewater Treatment Process with Variable Hydrodynamic Flow Patterns  

Kang, Seong-Wook (Department of Environment Engineering, the University of SUWON)
Cho, Wook-Sang (Department of Environment Engineering, the University of SUWON)
Huh, Hyung-Woo (Hanhwa Engineering & Construction Corp.)
Publication Information
Applied Chemistry for Engineering / v.16, no.2, 2005 , pp. 217-225 More about this Journal
Abstract
Because of the limitation of controllable operation variables for the wastewater treatment process with variable hydrodynamic flow patterns, it may preclude the use of this type of nutrient removal activated sludge process. As the operation variables, only temperature and dissolved oxygen (DO) have been used to operate the process. This study made an effort to improve treatment efficiency and operability of the process by the following methodologies: 1) process and operation data analysis using process simulation, 2) determination of optimal control logic or algorithm using a pilot-scaled experimental apparatus and its operations, and 3) application of experimental and simulation results to find the optimal process operation modes. In this study, it was found that the optimal operation mode named 'save mode' in the basis of process variables, such as the ammonia-nitrogen concentration of inlet flow, temperature and flow rate, can reduce the operation cost comparing with the present normal operation mode. And the stable conditions in nitrification were also shown by the proportional control of DO with the inlet air flow rate of blower and the mixing rate of mechanical aeration.
Keywords
variable hydrodynamic flow patterns; advanced wastewater treatment process; optimal control algorithms;
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