The E-Waste comprising of IT &TE including TVs can contain up to 60 different elements of which some are valuable, some are hazardous/toxic and some are both. Printed Circuit Board (PCB) commonly called as motherboard or printed wire board (PWB) contains a complex mix of elements and needs a very careful handling for recovery of precious metals and for minimizing impact on the environment during recovery process. The electrical and electronic equipments require very large amounts of non-ferrous/precious/semi-precious metals and are among the major contributors to the demand for non-ferrous/precious/semi-precious metals in the world.
The substances within the components of electrical and electronic equipment which have adverse impact on the environment are lead, mercury, cadmium, chromium (VI), halogenated substances (CFCs), polychlorinated biphenyls and poly-brominated di-phenyl ethers. Plastics and printed circuit board contains brominated flame retardants (BFRs). BFRs can give rise to dioxins and furans during incineration. Recoveries of these non-ferrous/precious/semi-precious metals from e-waste, if not done in an special designated environment friendly space, will result in large emissions of hazardous substances into the environment. So, Environmentally sound recycling/re-processing of e-waste starts with decontamination/ dismantling where the concentration of hazardous material/chemical is reduced followed by recycling and recovery of the material of economic value and then disposal of the residue in TSDF (Treatment, storage & Disposal facility). At Spreco Recycling , Dismantling operations are done using semi manual and automatic processes involving physical segregation operations for plastics, glass, steel, non-ferrous material, wires, gases, liquids and printed circuit boards followed by component recovery using component dismantling and segregation machines.