The regulations specify what is permissible and how cleaning should be done. Finding Alternatives Key to managing hazardous wastes is the institution of a program to eliminate or minimize as many of the contributing chemicals or processes as possible. This is known as pollution prevention. Finding safer substitutes or other means of accomplishing the same productivity and quality can simplify this process. An alternative would be to use technology to reduce, recycle, or treat the wastes prior to disposal.
Silver halides are the major cause for concern in the prepress stage.
The silver can be easily removed from solution by the use of a number of silver filter cartridges or by ionization filtering systems. Essentially, the silver is collected in the filters and held in place there. The resulting collection can be harvested periodically and converted into cash. Periodic testing of the effectiveness of the units is required under local regulations. The resulting water typically has been declared clean enough to discharge through the local sewer system.