Macro- and microscopic in-situ observation of gas bubbles and sludge particles in a biogas tower reactor

Macro- and microscopic in-situ observation of gas bubbles and sludge particles in a biogas tower reactor

Macroscopic and microscopic in-situ observation of particles and gas bubbles are used to get precise impressions of the hydrodynamical characteristics of a biologically active suspension. Moreover, values of in-situ velocities and particle densities can be gained by using these methods. The suspende...

Full description

Saved in:
Bibliographic Details
Published in:Water research (Oxford) Vol. 36; no. 11; pp. 2836 - 2842
Main Authors: Pietsch, Torsten, Mehrwald, Ralf, Grajetzki, Ralf, Sens, Jan, Pakendorf, Tim, Ulrich, Reinhard, Kumpart, Jörn, Matz, Gerhard, Märkl, Herbert
Format: Journal Article
Language:English
Published: Oxford Elsevier Ltd 01-06-2002
Elsevier Science
Subjects:
Agglomeration
Applied sciences
Biological and medical sciences
Biological treatment of waters
Biomass
Bioreactors
Biotechnology
Density
Environment and pollution
Exact sciences and technology
Filtration
Flocculation
Fundamental and applied biological sciences. Psychology
Gas bubbles
Gases
General purification processes
In-situ observation
Industrial applications and implications. Economical aspects
Particle Size
Pollution
Refuse Disposal
Sewage - chemistry
Sludge structure
Velocities
Wastewaters
Water Movements
Water treatment and pollution
Gas bubbles
In-situ observation
Density
Velocities
Sludge structure
Suspended particle
Bioreactor
Bubble
Upward flow
Biogas
Biomass
Waste water purification
Experimental study
Mud
Biological purification
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Macroscopic and microscopic in-situ observation of particles and gas bubbles are used to get precise impressions of the hydrodynamical characteristics of a biologically active suspension. Moreover, values of in-situ velocities and particle densities can be gained by using these methods. The suspended anaerobic sludge revealed an extensive fibrous structure (‘fur’) on its surface. The observed microfibers have a profound influence on the settling/flotation behavior of the particles because they increase the effective particle volume, they may trap gas bubbles and they favor agglomeration. The biomass particles do not appear as single spherical objects but due to its fibrous structure on the outside as strongly interacting mass. The compressibility of the bubbles which are entrapped in the sludge agglomerates results in a pressure-dependent density of the sludge particles.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0043-1354
1879-2448
DOI:10.1016/S0043-1354(01)00511-5