Reduction of microbial density level in wastewater activated sludge via freezing and thawing
Journal
Water Research
Journal Volume
33
Journal Issue
16
Pages
3532-3535
Date Issued
1999
Author(s)
Abstract
This note has employed a freeze/thaw method for treating activated sludge, with especial attention for the reduction capability of microbial density. The sludge dewaterability is most enhanced if the growing ice front could reject the flocs. On the other hand, the microbial density level heavily relies on the bacterial species and the freezing speed. In this specific case, the freeze/thaw conditioned sludge could be classified as a class B sludge. Copyright (C) 1999 Elsevier Science Ltd.This note has employed a freeze/thaw method for treating activated sludge, with especial attention for the reduction capability of microbial density. The sludge dewaterability is most enhanced if the growing ice front could reject the flocs. On the other hand, the microbial density level heavily relies on the bacterial species and the freezing speed. In this specific case, the freeze thaw conditioned sludge could be classified as a class B sludge.
Subjects
Activated sludge
Bacteria density level
Freezing
SDGs
Type
journal article