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Titolo:
Development and verification of design and operation criteria for the stepfeed process with nitrogen removal
Autore:
Larrea, L; Larrea, A; Ayesa, E; Rodrigo, JC; Lopez-Carrasco, MD; Cortacans, JA;
Indirizzi:
CEIT, Sect Environm Engn, San Sebastian 20018, Spain CEIT San Sebastian Spain 20018 Environm Engn, San Sebastian 20018, Spain INFILCO ESPANOLA SA, Project & Studies Dept, Madrid 28036, Spain INFILCO ESPANOLA SA Madrid Spain 28036 Studies Dept, Madrid 28036, Spain
Titolo Testata:
WATER SCIENCE AND TECHNOLOGY
fascicolo: 1, volume: 43, anno: 2001,
pagine: 261 - 268
SICI:
0273-1223(2001)43:1<261:DAVODA>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
ACTIVATED-SLUDGE PROCESS; TREATMENT PLANTS;
Keywords:
activated sludge; model verifications; nitrogen removal; optimization; process design; step feed;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
10
Recensione:
Indirizzi per estratti:
Indirizzo: Larrea, L CEIT, Sect Environm Engn, POB 1555, San Sebastian 20018, Spain CEIT POB 1555 San Sebastian Spain 20018 Sebastian 20018, Spain
Citazione:
L. Larrea et al., "Development and verification of design and operation criteria for the stepfeed process with nitrogen removal", WATER SCI T, 43(1), 2001, pp. 261-268

Abstract

The step feed process with three stages of denitrification-nitrification reactors has been studied using simulations in order to develop criteria forthe optimum selection of the design parameters and to propose efficient operational strategies. To verify the simulation results experimental studiesin a pilot plant of 1100 litres were carried out. The simulation studies showed that the optimum influent flow distribution to the three anoxic reactors is in the range of 40-40-20% and 33-33-34% depending on the wastewater characteristics and effluent requirements. These two latter conditions and in turn the influent flow distribution determine the anoxic and aerobic reactor volumes. The reduction of the dissolved oxygen in the two first aerobic reactors and the use of facultative zones in thefinal D-N stage are proposed as operational strategy. The experimental results proved the validity of the criteria developed for design and operation. A high capacity of the IAWQ activated sludge model No. 1 to predict the performance of the step feed process was observed.

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Documento generato il 04/04/20 alle ore 15:27:40