Liquid purification or separation – Processes – Separating
Patent
1995-06-07
1996-07-16
Upton, Christopher
Liquid purification or separation
Processes
Separating
210806, 210609, C02F 1116
Patent
active
055364209
ABSTRACT:
A drying bed for waste sludge in a wastewater treatment facility having a vertical drainage riser extending vertically from a subnatant discharge pipe near the bottom of the drying bed. A sludge inlet at an end of the drying bed communicates with a source of watery sludge. Water communicates through a mesh screen that wraps the vertical drainage riser and through openings in the vertical drainage riser to the subnatant discharge pipe. A valve is selectively opened to control the flow rate of the water from the subnatant discharge pipe. A method of dewatering waste sludge is disclosed.
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