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Titolo:
Operating parameters for a gas-liquid-solid fluidised bed bioreactor with a low density biomass support
Autore:
Sokol, W;
Indirizzi:
Univ Technol & Agr, Inst Chem Technol & Chem Engn, PL-85326 Bydgoszcz, Poland Univ Technol & Agr Bydgoszcz Poland PL-85326 PL-85326 Bydgoszcz, Poland
Titolo Testata:
BIOCHEMICAL ENGINEERING JOURNAL
fascicolo: 3, volume: 8, anno: 2001,
pagine: 203 - 212
SICI:
1369-703X(200110)8:3<203:OPFAGF>2.0.ZU;2-R
Fonte:
ISI
Lingua:
ENG
Soggetto:
PHENOL DEGRADATION; DRAFT-TUBE; BIOFILM REACTOR; WASTE-WATER; DYNAMICS; STATE; HYDRODYNAMICS;
Keywords:
operating parameters; gas-liquid-solid fluidised bed bioreactor; three-phase fluidised bed bioreactor; low density biomass support; industrial wastewater treatment;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
28
Recensione:
Indirizzi per estratti:
Indirizzo: Sokol, W Univ Technol & Agr, Inst Chem Technol & Chem Engn, Ul Seminaryjna3, PL-85326 Bydgoszcz, Poland Univ Technol & Agr Ul Seminaryjna 3 Bydgoszcz Poland PL-85326 nd
Citazione:
W. Sokol, "Operating parameters for a gas-liquid-solid fluidised bed bioreactor with a low density biomass support", BIOCH ENG J, 8(3), 2001, pp. 203-212

Abstract

The operating parameters for a gas-liquid-solid fluidised bed bioreactor with a low density (matrix particle density smaller than that of water) biomass support were investigated. In particular, the ratio of bed (settled) volume to bioreactor volume (V-b/V-R) and the air velocity U, for which the largest COD removals from brewery wastewater's were achieved, were determined for a bioreactor with KMT(R) (Kaldnes Miljotechnologi AS) particles (madeof polypropylene) used as biomass support. Measurements of COD versus timewere performed in a semi-continuous mode, that is, the air was continuously supplied to a bioreactor and the wastewater was introduced batch-wise at the beginning of experiments conducted for a set U. It was found that the lowest values of COD at the end of operation and hence the largest COD removals were obtained when a bioreactor was operated atthe ratio (V-b/V-R)(m) = 0.50 and the air velocity U-m = 0.018 m/s. Therefore, these values of (V-b/V-R)(m) and U-m can be considered as the optimal operating parameters for the bioreactor with KMT(R) particles when used in treatment of brewery wastewaters. The pH was controlled in the range 6.5-7.0 and the temperature was maintained at 28-30 degreesC. In the treatment of a 'raw' (no nutrients were added) wastewater, about 70% COD removal was achieved. In the operation with the wastewaters enriched in the nutrients, approximately a 90% COD removal was attained. The following amounts of the nutrient salts (mg/l): (NH4)(2)SO4 - 500, KH2PO4 - 200, MgCl2 - 30, NaCl - 30, CaCl2 - 20 and FeCl3 - 7 added to wastewater before treatment, were sufficient for biomass growth. It was possible to achieve the steady-state biomass loading in a bioreactor with the KMT(R) biomass support. Particle-particle and particle-wall collisions sloughed off the excess biomass. Clogging and channelling of the bedwere eliminated through the intensive motion of the particles. (C) 2001 Elsevier Science B.V All rights reserved.

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Documento generato il 02/10/20 alle ore 01:31:22