Process for treating sludge using low-level heat
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United States of America Patent
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-
Sep 21, 1999
Grant Date -
N/A
app pub date -
Jan 11, 1995
filing date -
Jan 11, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention describes a process and an apparatus for treating sludge having both liquid and solid constituents. The sludge is first heated to a minimum optimum draining temperature. During heating, mechanical dewatering of the sludge occurs. In a preferred embodiment, a process is disclosed for treating waste paint sludge generated from a paint spraybooth, and heating is performed using microwave radiation. Liquid released from the paint sludge during dewatering can be recycled back to the spraybooth water, and vaporized exhaust generated during heating can either be condensed into liquid form and recycled, or incinerated and, preferably, sparged through untreated sludge to pre-heat it.
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Cited Art Landscape
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