Process for treating sludge using low-level heat

Details Process for treating sludge using low-level heat Process for treating sludge using low-level heat

1995-01-11

1999-09-21

Hruskoci, Peter A.

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

34259, 34338, 203 47, 159 473, 210712, 210718, 210729, 210737, 210748, 210770, 210930, C02F 1114

Patent

active

059549700

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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