A novel technique for evaluating foam dynamics in anaerobic digesters

Title
A novel technique for evaluating foam dynamics in anaerobic digesters
Authors
박찬혁Slawomir W. HermanowiczDomenec Jolis
Keywords
Anaerobic sludge; Conductivity; Drainage; Foam stability
Issue Date
2013-06
Publisher
Water science and technology
Citation
VOL 67, NO 11, 2595-2601
Abstract
Foaming in anaerobic digesters has severe impacts on process efficiency and operational costs. In this study, we present an experimental method to determine foam behaviour and stability for various foaming solutions. This novel technique measured foam conductivity at different heights along a foam column allowing changes in foam composition to be monitored in time. We analysed foam stability which is primarily dependent on the foam drainage velocity, a quantity that can be determined from forced drainage experiments. The drainage velocity increased in the presence of anaerobic digester sludge, compared to simple surfactant foam. We proposed a new understanding of the effect of sludge particles on the foam stability. Both physical properties (foam physical constant, β) of foam and bubble surface interactions by applying stable and unstable foam in addition of surfactants are also evaluated and discussed.
URI
http://pubs.kist.re.kr/handle/201004/45736
ISSN
02731223
Appears in Collections:
KIST Publication > Article
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE