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Titolo:
Control of an alternating aerobic-anoxic activated sludge system - Part 2:optimization using a linearized model
Autore:
Kim, H; McAvoy, TJ; Anderson, JS; Hao, OJ;
Indirizzi:
Univ Maryland, Syst Res Inst, Dept Civil & Environm Engn, College Pk, MD 20742 USA Univ Maryland College Pk MD USA 20742 ronm Engn, College Pk, MD 20742 USA Univ Maryland, Syst Res Inst, College Pk, MD 20742 USA Univ Maryland College Pk MD USA 20742 Res Inst, College Pk, MD 20742 USA
Titolo Testata:
CONTROL ENGINEERING PRACTICE
fascicolo: 3, volume: 8, anno: 2000,
pagine: 279 - 289
SICI:
0967-0661(200003)8:3<279:COAAAA>2.0.ZU;2-C
Fonte:
ISI
Lingua:
ENG
Soggetto:
NITROGEN REMOVAL; DENITRIFICATION; NITRIFICATION; PLANTS;
Keywords:
optimization; process control; alternating aerobic-anoxic; nitrogen control;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
14
Recensione:
Indirizzi per estratti:
Indirizzo: Hao, OJ Univ Maryland, Syst Res Inst, Dept Civil & Environm Engn, College Pk, MD 20742 USA Univ Maryland College Pk MD USA 20742 n, College Pk, MD 20742 USA
Citazione:
H. Kim et al., "Control of an alternating aerobic-anoxic activated sludge system - Part 2:optimization using a linearized model", CON ENG PR, 8(3), 2000, pp. 279-289

Abstract

Complex models, such as activated sludge model No. 1 (ASM1), have rarely been used in practice for process control or optimization. One major reason for this is the computational effort demanded by these models for both parameter estimation and simulation, Therefore, a linearized version of the ASM1 model is developed and applied to the control and optimization of a bench-scale alternating aerobic/anoxic activated sludge system. The model prediction was used to optimize the aeration time by manipulating t(c) (total cycle time) and f(a) (fraction of aeration cycle time) while meeting the permit requirement of the effluent ammonia concentration, The linear nature of the model facilitates its use for on-line calculations, and error feedback is used to counteract problems of model inaccuracy. The model was applied totwo cases in which the influent compositions were either known currently or only the previous day's information was available. The average optimized f(a) was found to be 0.30 for the first case and 0.37 for the second case, when the maximum effluent NH4+-N concentration was set at 1 mg/l. The efficiency of nitrogen removal was 76% for both test cases since nitrate could almost completely be removed through adequate anoxic cycle ratios resulting from the f(a) optimization. (C) 2000 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 10/07/20 alle ore 02:46:09