Abstract
One of the biggest problems facing many utilities today is how to thicken, dry and dispose of waste solids produced by water treatment plants. In an attempt to save on handling costs, Denver Water in Denver, Colorado, has developed an approach to freeze‐drying that involves pumping sludge from deep inside a lagoon and redepositing it on the lagoon's ice covered surface. By freezing thin layers of sludge on ice or land this process optimizes the freeze‐drying process. This paper provides a detailed description of Denver Water's sludge freezing process.
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