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Title: Sludge dewatering in a freezing bed : a pilot-scale study
Authors: Martel, Courtland James.
Diener, C. J. (Carl J.)
Keywords: Freeze—thaw conditioning
Sludge dewatering
Sludge freezing
Sludge freezing bed
Publisher: Cold Regions Research and Engineering Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: CRREL report ; 91-6.
Description: CRREL Report
Abstract: In 1986 a pilot-scale sludge freezing bed was constructed at the U.S. Army Cold Regions Research and Engineering Laboratory in Hanover, New Hampshire. This bed was operated over the next three years using both anaerobically and aeeobically digested sludges. These tests demonstrated that both sludges can be effectively dewatered by this process. The final solid contents were 39.3% and 24.5% for anaerobically digested and aerobically digested sludges, respectively. The quality of the meltwater was similar to raw wastewater. Odors were not a problem if the meltwater was drained away as quickly as it formed. Both sludges were easily removed with a front-end loader. The actual depth of sludge frozen and thawed in the bed during each year of operation was very close to that predicted by design models.
Rights: Approved for public release; distribution is unlimited.
Appears in Collections:CRREL Report

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