Performance optimization of an alternating oxidation ditch system by cycle timelength variation

Mantziaras, ID; Stamou, A; Katsiri, A

dc.contributor.author	Mantziaras, ID	en
dc.contributor.author	Stamou, A	en
dc.contributor.author	Katsiri, A	en
dc.date.accessioned	2014-03-01T02:11:56Z
dc.date.available	2014-03-01T02:11:56Z
dc.date.issued	2012	en
dc.identifier.issn	19443994	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/29975
dc.subject	Alternating oxidation ditch system	en
dc.subject	Mathematical model	en
dc.subject	Nitrification-denitrification	en
dc.subject	Operational cycle	en
dc.subject	Optimization	en
dc.subject	Wastewater treatment	en
dc.title	Performance optimization of an alternating oxidation ditch system by cycle timelength variation	en
heal.type	journalArticle	en
heal.identifier.primary	10/5004/dwt.2012.3351	en
heal.identifier.secondary	http://dx.doi.org/10/5004/dwt.2012.3351	en
heal.publicationDate	2012	en
heal.abstract	This paper presents a methodology for the optimization of the operation of an alternating oxidation ditch system, performing carbon oxidation-nitrification, denitrification and settling, through the use of a mathematical model and pilot testing. Measurements have been made in a pilot plant located in the Sanitary Engineering Research and Development Center of E.Y.D.A.P at Metamorphosis-Athens. Also, a mathematical model consisting of 1-dimensional mass balance (convection-dispersion) equations, based on the IAWPRC activated sludge model No. 1 was used. After the calibration and verification of the model with the experimental data, the optimization of the system's performance was achieved by testing operational cycles with different time lengths. Since carbon removal is way under the 91/271 E.U. directive's upper limits and since the ditch system has not been designed for phosphorous removal, the limits for nitrogen removal have been used for comparison. In this work's example, from the eight operational cycles that have been tested (120-400 min), only one (220 min-nitrification: 120 min/ denitrification: 100 min), met fully the effl uent criteria for nitrogen and minimum consumption of energy. However, the selection of the optimum operational cycle for each case is in the choice of the environmental engineer. © 2012 Desalination Publications.	en
heal.journalName	Desalination and Water Treatment	en
dc.identifier.doi	10/5004/dwt.2012.3351	en
dc.identifier.volume	39	en
dc.identifier.issue	1-3	en
dc.identifier.spage	296	en
dc.identifier.epage	301	en