High-speed sludge freezing
Resource
Water Research 35 (14): 3502-3507
Journal
Water Research
Journal Volume
35
Journal Issue
14
Pages
3502-3507
Date Issued
2001
Date
2001
Author(s)
Abstract
The investigation examined the feasibility of applying a "high-speed freezing technique, using liquid nitrogen freezing, to condition activated sludges and alum sludges. Experimental results indicate that the freezing speed is much faster than that adopted in most previous works on sludge freezing. Although the filterability and settleability of the alum sludge is improved by 3-min liquid nitrogen freezing, no similar improvement is observed for activated sludge. Moreover, curing affects neither sludge after liquid nitrogen freezing, but affects the slow-freezing activated sludge.
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Type
journal article
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