Clarifier with sludge dewatering
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United States of America Patent
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Oct 19, 1999
Grant Date -
N/A
app pub date -
Nov 14, 1997
filing date -
Nov 14, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A rectangular clarifying tank has an inclined beach formed of sheet metal and having 575 holes per square inch, each hole having a diameter of 20 thousandths of an inch. Two side chain drives advance several scrapers along the beach. Each scraper has a rotatable knurled pipe which turns the sludge and aids dewatering through the beach. The sludge removed from the clarifier has a solids content of between eight and twelve percent. Additional dewatering may be accomplished by applying a vacuum to the last one-quarter of the beach. A tray positioned beneath the beach collects water which drains through the beach. The drain water may be returned to the clarifier tank or may be directly treated as clarified water.
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