Cold-Weather Clean

While cold weather can aggravate some wastewater treatment systems, the freezing/crystallization process can be exploited to purify water. Sludge freezing bed technology, which uses crystallizing purification and dewatering to remove impurities, was developed by USACE for cold regions. The sludge fr...

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Bibliographic Details
Published in:Water environment & technology 1998-08, Vol.10 (8), p.50-53
Main Author: Martel, C. James
Format: Magazinearticle
Language:English
Subjects:
Applied sciences
Drying
Environmental engineering
Exact sciences and technology
FEATURES
Freezing
General purification processes
Lagoons
Other industrial wastes. Sewage sludge
Pollution
Sludge
Sludge dewatering
Sludge digestion
Sludge treatment
Wastes
Wastewater
Wastewater treatment
Wastewaters
Water treatment and pollution
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Summary:While cold weather can aggravate some wastewater treatment systems, the freezing/crystallization process can be exploited to purify water. Sludge freezing bed technology, which uses crystallizing purification and dewatering to remove impurities, was developed by USACE for cold regions. The sludge freezing bed process, operation, and effectiveness are described. One freezing bed constructed at Fort McCoy, WI, removed 94% of the water from anaerobically digested sludge, saving $450 per cleaning for each of 14 drying beds. One manufacturer of snow making equipment is using wastewater effluent treated in a freezing bed to make snow, which can be stored in piles that melt slowly in spring and summer. The benefits of this Snowfluent process are listed.
ISSN:1044-9493
1938-193X