A new approach of using free-ammonia measurements as the basis of a control strategy to optimise a chloraminated water distribution system was tested in a laboratory evaluation. A test rig with a newly developed low level on-line free-ammonia analyser was constructed to investigate two different control configurations, the currently used feedback and the proposed feedforward. The results of this trial showed that only using the free-ammonia analyser for feedback control is not ideal due to its inability to detect chlorine overdosing situations. Better results regarding the maximum yield of disinfectant residuals when using the feedforward configuration were observed, and free-ammonia concentrations below 0.065 mg/L were consistently achieved.
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Research Article|
February 01 2009
Assessment of chloramination control strategy based on free-ammonia concentration
Skadi Motzko
;
Skadi Motzko
1Cooperative Research Centre for Water Quality and Treatment, Private Mail Bag 3, Salisbury, SA 5108, Australia
2Australian Water Quality Centre, PMB 3, Salisbury, South Australia 5110, Australia
3Department of Process Engineering, Georg-Simon-Ohm-Fachhochschule Nürnberg, Wassertorstraße 10, D-90489, Nurnberg, Germany
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Rolando Fabris
;
Rolando Fabris
1Cooperative Research Centre for Water Quality and Treatment, Private Mail Bag 3, Salisbury, SA 5108, Australia
2Australian Water Quality Centre, PMB 3, Salisbury, South Australia 5110, Australia
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Alexander Badalyan
;
Alexander Badalyan
4Sansom Institute, University of South Australia, City East Campus, Adelaide, South Australia 5095, Australia
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Ralph Henderson
;
Ralph Henderson
5Water Corporation, 629 Newcastle Street, Leederville, Western Australia 6007, Australia
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Christopher W. K. Chow
;
1Cooperative Research Centre for Water Quality and Treatment, Private Mail Bag 3, Salisbury, SA 5108, Australia
2Australian Water Quality Centre, PMB 3, Salisbury, South Australia 5110, Australia
E-mail: chris.chow@sawater.com.au
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Dammika Vitanage
Dammika Vitanage
1Cooperative Research Centre for Water Quality and Treatment, Private Mail Bag 3, Salisbury, SA 5108, Australia
6Sydney Water Corporation, 115-123 Bathurst Street, Sydney, NSW 2000, Australia
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Journal of Water Supply: Research and Technology-Aqua (2009) 58 (1): 29–39.
Article history
Received:
August 02 2007
Accepted:
February 05 2008
Citation
Skadi Motzko, Rolando Fabris, Alexander Badalyan, Ralph Henderson, Christopher W. K. Chow, Dammika Vitanage; Assessment of chloramination control strategy based on free-ammonia concentration. Journal of Water Supply: Research and Technology-Aqua 1 February 2009; 58 (1): 29–39. doi: https://doi.org/10.2166/aqua.2009.068
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