Sludge treatment process

Details Sludge treatment process Sludge treatment process

1990-03-09

1991-08-06

Dawson, Robert A.

Liquid purification or separation

Processes

Chemical treatment

210748, 210749, 210758, 210766, 210739, B01D 124

Patent

active

050375601

ABSTRACT:
A process and apparatus for reducing sludges, especially those sludges containing heavy metals and generated in electroplating, to a solid state where the toxic constituents of the waste are prevented from leaching. The process involves mixing a metallic soap or hydroxide with the sludge and then using low-temperature induction heating to form coacervate bonds that encapsulate the toxic waste particles in a pumice-like matrix. The apparatus allows a small amount of metallic soap to be thoroughly mixed through sludge and a continuous ribbon of the resulting putty-like waste to be fed into a series of microwave drying ovens and evacuation chambers. After the drying and dewatering sequences, the apparatus extrudes a pumice-like solid suitable for disposal in accordance with EPA regulations.

REFERENCES:
patent: 4043047 (1977-09-01), Galliker
patent: 4221680 (1980-09-01), Hardwick et al.
patent: 4242220 (1980-12-01), Sato
patent: 4615809 (1986-10-01), King
patent: 4927564 (1990-05-01), Barlou et al.
EPA/530-2W-88-009-1, Best Demonstrated Available Technology (BDAT) Document for F006, vol. 12, (Proposed, May 1988, 40 CFR & 1.268 Appendix 1-Toxicity Characteristics Leaching Procedure.

Affiliated with

Also associated with

Rating

Sludge treatment process does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Sludge treatment process, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sludge treatment process will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1985117