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Titolo:
Organic matter removal from wastewaters of the black olive industry by chemical and biological procedures
Autore:
Benitez, FJ; Acero, JL; Gonzalez, T; Garcia, J;
Indirizzi:
Univ Extremadura, Dept Ingn Quim & Energet, E-06071 Badajoz, Spain Univ Extremadura Badajoz Spain E-06071 & Energet, E-06071 Badajoz, Spain
Titolo Testata:
PROCESS BIOCHEMISTRY
fascicolo: 3, volume: 37, anno: 2001,
pagine: 257 - 265
SICI:
1359-5113(200111)37:3<257:OMRFWO>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
ADVANCED OXIDATION PROCESSES; ANAEROBIC-DIGESTION; HYDROGEN-PEROXIDE; MILL WASTEWATERS; FENTONS REAGENT; WATER-TREATMENT; KINETIC-MODEL; WASTE-WATER; REACTORS; OZONE;
Keywords:
organic substrate removal; washing wastewater black olives; chemical treatments; anaerobic digestion;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
24
Recensione:
Indirizzi per estratti:
Indirizzo: Benitez, FJ Univ Extremadura, Dept Ingn Quim & Energet, E-06071 Badajoz, Spain Univ Extremadura Badajoz Spain E-06071 -06071 Badajoz, Spain
Citazione:
F.J. Benitez et al., "Organic matter removal from wastewaters of the black olive industry by chemical and biological procedures", PROCESS BIO, 37(3), 2001, pp. 257-265

Abstract

Chemical treatments of wastewaters from the olive industry are conducted by means of single UV radiation and by the action of hydroxyl radicals, which are generated by the simultaneous presence of UV radiation and hydrogen peroxide, Fe2+ and hydrogen peroxide (Fenton system) and Fe2+ and hydrogen peroxide plus UV radiation (photo-Fenton system). The single photochemical process produces a 35% removal of organic matter present measured as COD after 6 h of reaction, while the hydroxyl radicals enhance significantly this reduction with values in the range 41-76%. At the same time, a removal of aromatic compounds in the oxidation by single UV radiation and combined UV H2O2 was obtained in the range 20-52%. In the anaerobic digestion process,an organic matter reduction in the range 0.77-0.65 g of COD degraded per gof COD fed to the reactor was obtained, and a value of 250 ml CH4.g COD-1 obtained for the methane yield coefficient. A kinetic study was conducted using the Monod model, and rate constants k(o) in the range 0.061-0.015 min(-1) achieved. This indicates that some inhibition effects by substances present take place. The application of the Levesnpiel model for that inhibitory effect leads to the determination of the rate constant, inhibitory parameter and critical substrate concentration of inhibition, their values being k=0.205 min(-1), n=18.8 and S*=20.1 g l(-1) respectively. Finally, the anaerobic digestion of the chemically pretreated wastewaters increases the rateconstant k(o), as well as the methane yield coefficient, its value being 282 nil CH4.g COD-1. (C) 2001 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/04/20 alle ore 21:47:57