If the amount of waste generated on-site is insufficient for a cost-effective recovery system, or if the recovered material cannot be reused on-site, off-site recovery is preferable. Materials commonly reprocessed off-site are oils, solvents, electroplating sludges and process baths, scrap metal, and lead-acid batteries. The cost of off-site recycling depends upon the purity of the waste and the market for the recovered materials.
The photoprocessing company mentioned above also collects used film and sells it to a recycler. The recycler burns the film and collects the silver from residual ash. By removing the silver from the ash, the fly ash becomes non-hazardous (EPA 1989).
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