Validation and application of a simple model for circular secondary settling tanks

Stamou, AI; Giokas, DL; Kim, Y; Paraskevas, PA

dc.contributor.author	Stamou, AI	en
dc.contributor.author	Giokas, DL	en
dc.contributor.author	Kim, Y	en
dc.contributor.author	Paraskevas, PA	en
dc.date.accessioned	2014-03-01T01:29:28Z
dc.date.available	2014-03-01T01:29:28Z
dc.date.issued	2008	en
dc.identifier.issn	1790-7632	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/19270
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-77953331551&partnerID=40&md5=584ba6832a7ef8d62898325e9aca8e4c	en
dc.subject	Circular secondary settling tasks	en
dc.subject	Diluted sludge concentration	en
dc.subject	Dynamic simulation	en
dc.subject	Non-linear mathematical modelling	en
dc.subject	Sludge blanket	en
dc.subject	Steady-state analysis	en
dc.subject.classification	Environmental Sciences	en
dc.subject.other	ACTIVATED-SLUDGE CLARIFIER	en
dc.subject.other	SIMPLE EMPIRICAL-MODEL	en
dc.subject.other	SUSPENDED-SOLIDS CONCENTRATIONS	en
dc.subject.other	TREATMENT-PLANT	en
dc.title	Validation and application of a simple model for circular secondary settling tanks	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	2008	en
heal.abstract	A simple model is presented for the dynamic calculation of the sludge blanket height and concentrations of suspended solids (diluted, sludge blanket and return sludge) in circular secondary settling tanks. The model combines a mass balance equation with three empirical equations, which account for the main processes. These equations form a non-linear, dynamic system, which cannot be solved explicitly; thus, a trial-and-error method is adopted. Field data were obtained from a full-scale treatment plant in transient and steady state conditions and were used in the calibration, the verification and the application of the model. Model calibration involved the determination of only two coefficients, which were found to be relatively constant in various operating conditions. Model verification and application were successful showing a satisfactory agreement with field data. A discrepancy of the model to over-predict sludge blanket height during sudden hydraulic overloads was noted and explained. Copyright © 2008 Global NEST.	en
heal.publisher	GLOBAL NETWORK ENVIRONMENTAL SCIENCE & TECHNOLOGY	en
heal.journalName	Global Nest Journal	en
dc.identifier.isi	ISI:000254825700009	en
dc.identifier.volume	10	en
dc.identifier.issue	1	en
dc.identifier.spage	62	en
dc.identifier.epage	72	en