Recycling
experts hit milestone in quest for zero-waste phone
Video: https://youtu.be/FarsLBeDTW0 and photos: https://flic.kr/s/aHsmhrJTKW
UBC researchers have perfected a process to efficiently separate fibreglass and resin – two of the most commonly discarded parts of a cellphone – bringing them closer to their goal of a zero-waste cellphone.
It’s one of the first processes to use simple techniques like
gravity separation to cleanly lift organic resins from inorganic fibreglass.
“Discarded cellphones are a huge, growing source of electronic
waste, with close to two billion new cellphones sold every year around the
world and people replacing their phones every few years,” said UBC mining
engineering professor Maria Holuszko, who led the research.
“The challenge is to break down models that can no longer be reused into useful materials–in a way that doesn’t harm the environment.”
“The challenge is to break down models that can no longer be reused into useful materials–in a way that doesn’t harm the environment.”
Most e-waste recycling firms focus on recovering useful metals
like gold, silver, copper and palladium, which can be used to manufacture other
products.
But nonmetal parts like fibreglass and resins, which make up the bulk of cellphones’ printed circuit boards, are generally discarded because they’re less valuable and more difficult to process.
They’re either fed to incinerators or become landfill, where they can leach hazardous chemicals into groundwater, soil and air.
But nonmetal parts like fibreglass and resins, which make up the bulk of cellphones’ printed circuit boards, are generally discarded because they’re less valuable and more difficult to process.
They’re either fed to incinerators or become landfill, where they can leach hazardous chemicals into groundwater, soil and air.
Holuszko, who co-founded UBC’s urban mining innovation centre—a
unit focused on reclaiming valuable metals and other materials from electronic
waste—was determined to find a better recycling solution.
With PhD student Amit Kumar, she developed a process that uses gravity separation and other simple physical techniques to process cellphone fibreglass and resins in an environmentally neutral fashion.
With PhD student Amit Kumar, she developed a process that uses gravity separation and other simple physical techniques to process cellphone fibreglass and resins in an environmentally neutral fashion.
“The key here is gravity separation, which efficiently separates
the fibreglass from the resin by using the differences in their densities. The
separated fibreglass can then be used as a raw material for construction and
insulation. In the future, if we can find a way to improve the quality of the
recycled fibreglass, it may even be suitable for manufacturing new circuit
boards,” said Kumar.
The researchers are now looking into developing a large-scale
commercial model of the process, in partnership with Ronin8, a Richmond, B.C.
recycling company that separates the different plastics, fibres and metals in
electronic waste streams without using toxic chemicals or losing precious
metals.
“Ronin8 has developed an innovative e-waste process for
electronic waste that aims to address the intrinsic faults in traditional
e-waste processes today,” said Travis Janke, director of engineering at Ronin8.
“Our vision is to achieve a zero-waste end-of-life solution for electronics,
and our work with Maria and Amit at UBC has moved us closer to this reality.”
The researchers say their task has taken on a new urgency in
light of China’s waste import ban, which took effect Jan. 1, 2018.
“We need a better way to manage our electronic hardware
recycling, and a cost-effective, environmentally responsible method of mining
e-waste for valuable materials would be a good step in that direction,” said
Holuszko.
