Readers may recall that a journalist confirmed one of my theses about Guiyu, China. There had to be something else going on besides "aqua regia" (using acid to recover gold), or it would not be financially viable for Guiyu to import PCs. Sure enough, similar to the cell phone chip reuse documented at TechTravels, there was chip harvesting and reuse going on. That's a huge savings compared to mining.
The river in Guiyu is polluted from textile dying mills in the area, but we don't want to understate the pollution coming from circuit board residuals. It can be pretty nasty.
You could almost make the case that Guiyu is internalizing the pollution that is being diverted from the mining communities, i.e. make the case for Chinese altruism. But can fair trade recycling find a way to incentivize Guiyu to maintain chip harvesting and reuse without shouldering the pollution of the residuals?
Circuits that come apart in water may allow the chips to be reused more safely.
The river in Guiyu is polluted from textile dying mills in the area, but we don't want to understate the pollution coming from circuit board residuals. It can be pretty nasty.
You could almost make the case that Guiyu is internalizing the pollution that is being diverted from the mining communities, i.e. make the case for Chinese altruism. But can fair trade recycling find a way to incentivize Guiyu to maintain chip harvesting and reuse without shouldering the pollution of the residuals?
Circuits that come apart in water may allow the chips to be reused more safely.
The National Physical Laboratory (NPL), along with partners In2Tec Ltd (UK) and Gwent Electronic Materials Ltd, have developed a printed circuit board (PCB) whose components can be easily separated by immersion in hot water. The work was part of the ReUSE project, funded by the UK government's Technology Strategy Board.
Recyclable electronics: just add hot water
The National Physical Laboratory (NPL), along with partners In2Tec Ltd (UK) and Gwent Electronic Materials Ltd, have developed a printed circuit board (PCB) whose components can be easily separated by immersion in hot water. The work was part of the ReUSE project, funded by the UK government's Technology Strategy Board.
The Challenge
The electronics industry has a waste problem - currently over 100 million electronic units are discarded annually in the UK alone, making it one of the fastest growing waste streams.
It was estimated in a DTI-funded report, that around 85% of all PCB scrap board waste goes to landfill. Around 70% of this being of non-metallic content with little opportunity for recycling. This amounts to around 1 million tonnes in the UK annually equivalent to 81 x HMS Belfasts.
The Solution
The aim of the ReUSE (Reuseable, Unzippable, Sustainable Electronics) project was to increase the recyclability of electronic assemblies, in order to avoid an ever-growing volume of waste.
The project partners designed, developed and tested a series of unzippable polymeric layers which, while withstanding prolonged thermal cycling and damp heat stressing, allow the assemblies to be easily separated at end-of-life into their constituent parts, after immersion in hot water.