Pollution Prevention and Control Technologies for Plating
Section 7 - Off-Site Metals Recycling
Section 7 covers off-site recycling of non-precious, metal-bearing
wastes. Off-site recycling is becoming a popular alternative to
land disposal for metal finishing wastes such as wastewater treatment
sludge. Approximately 31% of the plating shops that responded
to the Users Survey currently send this type of sludge to off-site
recycling firms. The sludges are processed thermally or chemically
and are converted to a usable form such as feedstock for smelting
Exhibit 7-1 presents a summary of the Users Survey data covering
off-site recycling of wastewater treatment plant sludges (RCRA
waste code F006 or F019). Column 1 shows the shop code (PS 001
to PS 318). Columns 2 and 3 show the name of the recycle company
and the distance from the plating shop to the recycling company
(ranges of distances are used to conceal the identity of the respondents).
Column 4 indicates the annual quantity of sludge that is shipped
for recycling. Columns 5 and 6 show the unit cost and total cost
for recycling, including transportation. The average and median
values for waste quantity, unit cost and total cost are shown
at the bottom of Exhibit 7-1.
Exhibit 7-2 presents a summary of the Users Survey data covering
off-site recycling of spent metal finishing solutions and miscellaneous
wastes. Some respondents to the survey listed wastes within their
completed questionnaire that are disposed of rather than recovered.
An effort was made to eliminate these data from the database;
however, in some cases, the fate of the waste could not be determined.
For example, many West Coast platers send their spent baths to
Norris Industries. This company was contacted in an effort to
determine if these wastes are treated/disposed or recycled. Norris
Industries did not respond to the request for information and
the fate of the wastes could therefore not be determined.
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