Dynamic evaluation of integrated control strategies for enhanced nitrogen removal in activated sludge processes
Author
Summary, in English
In this paper, six different strategies for integrated control of nitrate recirculation flow rate and external carbon addition in a predenitrifying biological wastewater treatment system are proposed and evaluated using the COST simulation benchmark. The proposed control strategies consist of two or three feedback control loops, which manipulate the nitrate recirculation and the carbon dosage flow rates in an integrated manner, such that the consumption of external carbon is minimized while the nitrate discharge limits are met. The control systems require measurements of nitrate concentrations at the end of both the anoxic and the aerobic zones. A number of simulations are performed and the results show that the control strategies can maintain the designated effluent quality in the presence of external disturbances, while obtaining excellent results in terms of consumption of external carbon, as well as meeting the general plant performance and controller criteria as defined by the benchmark group. (c) 2005 Elsevier Ltd. All rights reserved.
Department/s
Publishing year
2006
Language
English
Pages
1269-1278
Publication/Series
Control Engineering Practice
Volume
14
Issue
11
Links
Document type
Journal article
Publisher
Elsevier
Topic
- Other Electrical Engineering, Electronic Engineering, Information Engineering
Keywords
- pre-denitrification process
- recirculation
- nitrate
- external carbon addition
- benchmark simulation model
- control
- wastewater
Status
Published
ISBN/ISSN/Other
- ISSN: 0967-0661