Liquid purification or separation – Processes – Including controlling process in response to a sensed condition
Patent
1990-05-31
1992-02-11
Wyse, Thomas
Liquid purification or separation
Processes
Including controlling process in response to a sensed condition
210743, 210766, 210770, 210774, 210808, 210609, C02F 1112
Patent
active
050873784
ABSTRACT:
The present invention is concerned with a process for enhancing the dewaterability of a waste sludge having a substantial content of water-retaining cellular structure arising from microbiological action and having a solids content of at least fifteen percent by weight. The pH of the sludge is adjusted to 4.0 or less, the sludge is subjected to heat treatment to significantly enhance its filterability, the pH is again adjusted to near neutral, the sludge is subjected to a second heat treatment step, and the sludge is filtered to a final solids content in excess of about fifty-five percent by weight.
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Pori International, Inc.
Wyse Thomas
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