Flocculation, in the field of chemistry, is a process wherein colloids come out of suspension in the form of floc or flake; either spontaneously or due to the addition of a clarifying agent.
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A rail with trail in the United States; train at right. A rail trail is the conversion of a disused railway into a multi-use path, typically for walking, cycling and sometimes horse riding. The characteristics of abandoned railwaysâflat, long, frequently running through historical areasâare appealing for various developments.