Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
BTEX catabolism interactions in a toluene-acclimatized biofilter
Autore:
du Plessis, CA; Strauss, JM; Riedel, KHJ;
Indirizzi:
Univ Orange Free State, Dept Microbiol & Biochem, ZA-9301 Bloemfontein, South Africa Univ Orange Free State Bloemfontein South Africa ZA-9301 n, South Africa
Titolo Testata:
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
fascicolo: 1, volume: 55, anno: 2001,
pagine: 122 - 128
SICI:
0175-7598(200101)55:1<122:BCIIAT>2.0.ZU;2-L
Fonte:
ISI
Lingua:
ENG
Soggetto:
SUBSTRATE INTERACTIONS; MIXED CULTURE; P-XYLENE; BIODEGRADATION; BENZENE; KINETICS; COMETABOLISM; DEGRADATION; MIXTURES; GASOLINE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
23
Recensione:
Indirizzi per estratti:
Indirizzo: du Plessis, CA Billiton Proc Res, Private Bag X10014, ZA-2125 Randburg, South Africa Billiton Proc Res Private Bag X10014 Randburg South Africa ZA-2125
Citazione:
C.A. du Plessis et al., "BTEX catabolism interactions in a toluene-acclimatized biofilter", APPL MICR B, 55(1), 2001, pp. 122-128

Abstract

BTEX substrate interactions for a toluene-acclimatized biofilter consortium were investigated. Benzene, ethylbenzene, o-xylene, m-xylene and p-xyleneremoval efficiencies were determined at a loading rate of 18.07 g m(-3) h(-1) and retention times of 0.5-3.0 min. This was also repeated for toluene in a 1:1 (m/m) ratio mixture (toluene: benzene, ethylbenzene, or xylene) with each of the other compounds individually to obtain a final total loadingof 18.07 g m(-3) h(-1). The results obtained were modelled using Michaelis-Menten kinetics and an explicit finite difference scheme to generate v(max) and K-m parameters. The v(max)/K-m ratio (a measure of the catalytic efficiency, or biodegradation capacity, of the reactor) was used to quantify substrate interactions occurring within the biofilter reactor without the need for free-cell suspended and monoculture experimentation. Toluene was found to enhance the catalytic efficiency of the reactor for p-xylene, while catabolism of all the other compounds was inhibited competitively by the presence of toluene. The toluene-acclimatized biofilter was also able to degrade all of the other BTEX compounds, even in the absence of toluene. The catalytic efficiency of the reactor for compounds other than toluene was in theorder: ethylbenzene > benzene > o-xylene> m-xylene>p-xylene. The catalyticefficiency for toluene was reduced by the presence of all other tested BTEX compounds, with the greatest inhibitory effect being caused by the presence of benzene, while o-xylene and p-xylene caused the least inhibitory effect. This work illustrated that substrate interactions can be determined directly from biofilter reactor results without the need for free-cell and monoculture experimentation.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/09/20 alle ore 09:26:25