Title: Operation of a three-phase biofilm fluidized sand bed reactor for aerobic wastewater treatment
Authors : Ryhiner, Gerhard B.
Petrozzi, Sergio
Dunn, Irving J.
Published in : Biotechnology and Bioengineering
Volume(Issue) : 32
Issue : 5
Pages : 677
Pages to: 688
Publisher / Ed. Institution : John Wiley & Sons
Issue Date: 1988
License (according to publishing contract) : Licence according to publishing contract
Type of review: Peer review (Publication)
Language : English
Subject (DDC) : 572: Biochemistry
Abstract: A biofilm fluidized sand bed column reactor (14 L) has been operated in the three-phase mode on a soluble glucose-yeast hydrolysate substrate in which the biofilm-sand phase (1-2.5 L) was suspended by direct aeration of the bed. Within two weeks a tight biofilm was formed whose activity resulted in a 90% reduction, with loads of 10.7 kg TC/m3day. The residence time was 1 h. The biofilm remained intact during operation with high residence times (up to 23 h) over three weeks. Oxygen transfer coefficients varied with aeration rate and sand quantity between 0.02 and 0.04 s−1 during non growth conditions; they decreased with increasing amounts of clean sand and were higher and relatively independent of the sand fraction with biofilm-covered sand. Aeration rates used in the 14 L reactor were 23-40 L/min (2.4-4.1 cm/s) and were sufficient to suspend 78-92% f the biofilm-covered sand. Clean sand was 50-75% suspended. Oxygen uptake rates varied between 15.4 and 23.1 mol/m3 h.
Departement: Life Sciences and Facility Management
Publication type: Article in scientific Journal
DOI : 10.1002/bit.260320513
ISSN: 0006-3592
URI: https://digitalcollection.zhaw.ch/handle/11475/3146
Appears in Collections:Publikationen Life Sciences und Facility Management

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