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Titolo:
Long-term evaluation of adsorption capacity in a biological activated carbon fluidized bed reactor system
Autore:
Zhao, XD; Hickey, RF; Voice, TC;
Indirizzi:
Michigan State Univ, Dept Civil & Environm Engn, E Lansing, MI 48824 USA Michigan State Univ E Lansing MI USA 48824 Engn, E Lansing, MI 48824 USA EFX Syst Inc, Lansing, MI 48910 USA EFX Syst Inc Lansing MI USA 48910EFX Syst Inc, Lansing, MI 48910 USA
Titolo Testata:
WATER RESEARCH
fascicolo: 13, volume: 33, anno: 1999,
pagine: 2983 - 2991
SICI:
0043-1354(199909)33:13<2983:LEOACI>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
GROWTH;
Keywords:
GAC; BAC; biological activated carbon; fluidized bed reactor; biofilm; adsorption; toluene; bioregeneration;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
19
Recensione:
Indirizzi per estratti:
Indirizzo: Voice, TC Michigan State Univ, Dept Civil & Environm Engn, E Lansing, MI 48824 USA Michigan State Univ E Lansing MI USA 48824 ansing, MI 48824 USA
Citazione:
X.D. Zhao et al., "Long-term evaluation of adsorption capacity in a biological activated carbon fluidized bed reactor system", WATER RES, 33(13), 1999, pp. 2983-2991

Abstract

The adsorption capacity of biofilm coated activated carbon from a biological fluidized bed reactor which treated toluene contaminated water was determined systematically over an extended period of operation. The adsorption capacity of biocoated carbon remained at greater than 70% of initial levels during the first two months. After six months of operation, the remaining capacity was still approximately 40, 52 and 57% of the initial value for equilibrium toluene concentrations of 0.1, 3 and 10 mg/L, respectively. If theadsorption removal mechanism is used to provide a buffer during the transient conditions, this remaining capacity may be sufficient without carbon replacement. There was no direct relation between the amount of biomass or the thickness of the biofilm on the carbon and the remaining adsorptive capacity. The loss of adsorption capacity over an extended period of operation appears to result directly from bioactivity, rather than from toluene loading. Bioregeneration of this long-term capacity loss. was not observed with continued operation for 100 days after the toluene feed was stopped and the nutrient and oxygen supplies continued. (C) 1999 Elsevier Science Ltd. All rights reserved.

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Documento generato il 19/01/20 alle ore 20:57:52