Solar-powered project prints sanitation solution to plastics problem

Solar powered 3-D printers designed to repurpose ubiquitous plastic rubbish and help improve access to clean water supply have been successfully trialled in the Solomon Islands.

Over the past 12 months, Deakin University, in partnership with Plan International Australia, has developed the world-first technology capable of printing plumbing and sanitation supplies using discarded plastics.

The research team has just returned from the Solomon Islands, where the printers were successfully trialled in the field, powered with solar energy, despite a week of cyclonic conditions and rain.

After a scavenging trip to collect waste plastics, the team converted the hard and soft plastics they collected, including discarded keyboards, jerry cans and printer cartridges, into plastic filament that was fed into the printer.

Working with volunteers from local villages to identify leaks in rural water supply systems, the project team measured the pipes, designed a replacement part and 3-D printed the part in hard plastics. The team also used soft plastics to 3-D print seals for leaking taps.

Dr. Mazher Mohammed, a Senior Research Fellow in Deakin's School of Engineering, said the trip had led him to coin the term "extreme 3-D printing".

"It was amazing to not just get outside the lab environment, but to test our equipment in the middle of the jungle in cyclonic conditions. If we can make it work here, I truly believe we can make it work anywhere," Dr. Mohammed said.

"In the parts of the Solomon Islands we visited there is a significant need for customised sanitation parts. We saw mismatched pipe everywhere, bandaged up with car inner tubes, bamboo and cloth. Some taps were leaking the equivalent of a bucket of water every few minutes.

"While in the Solomon Islands we also found we could use the reclaimed plastics for other applications, from jewellery making, basket weaving and even cutting grass. We believe we've only scratched the surface of the potential application for this equipment, helping turn trash into treasure."

Plan International Australia's Manager for Water, Sanitation and Hygiene, Tom Rankin, said the potential applications of the technology—powered by free and abundant sunshine—were 'limitless'.

"Finding effective means of recycling is vital everywhere, but particularly in places like Honiara, where plastic waste is increasing and its management remains minimal. In the streets of Honiara, there is plastic literally everywhere. It clogs up the drains causing flooding and flows out into the sea, killing marine life. Our aim was to turn waste plastic into useful parts and we've achieved that," Mr Rankin said.

"This trial was a huge advancement and we did what we set out to, which was to prove that recycled plastics can be used to print useful parts. It works and that is huge news. The next step is to get the technology working reliably and to consider what else we could use it for."