Simple control strategies of methanol dosing for post-denitrification
The objective of this work is to propose a simple but efficient way of controlling the carbon addition for the post-denitrification process in order to comply with regulatory constraints and optimize operating cost. A Biostyr® pilot column filled with polystyrene beads was used for the experiments....
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Published in | Water science and technology Vol. 38; no. 3; pp. 291 - 297 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
01.08.1998
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Online Access | Get full text |
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Summary: | The objective of this work is to propose a simple but efficient way of controlling the carbon addition for the post-denitrification process in order to comply with regulatory constraints and optimize operating cost. A Biostyr® pilot column filled with polystyrene beads was used for the experiments. In order to simulate a secondary treated water from a nitrifying stage with a carbon source addition, the feed water was composed of river water dosed with nitrates, phosphates and methanol. Methanol was added initially with no control (at different constant rates) and in a second stage with different control strategies based on the on-line measurement of inlet and/or outlet nitrate concentrations. This simple dosing mode proved to be very efficient in set-point tracking to ensure the effluent quality and in minimizing the methanol addition (up to 20% less methanol consumption), thus optimizing operation costs. |
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ISSN: | 0273-1223 1996-9732 |
DOI: | 10.2166/wst.1998.0223 |