none
none

BURN-FREE ENERGY GENERATION FROM PLASTICS

12-07-2017
by 
in 

The first systems to use anaerobic digestion technology to turn waste plastics into energy and fertiliser are being developed in South Australia.

POET Systems expects to have its first two machines – each capable of processing 20 tonnes of plastic a week – operating commercially in about 12 months.

More than one million tonnes of contaminated plastic deemed unfit for recycling is sent to landfill in Australia each year. In the United States the figure is almost 10 million tonnes.

Inventor David Thompson said his plastic to energy technology had so far successfully been applied to polyethylene, polypropylene, polystyrene and expanded polystyrene.

He said the anaerobic digestion process varied upon disposal feedstock and depended also upon temperature and system set up.

“The POET system prepares waste plastic in a way that microbial digestion can take place quickly and I think that’s really the key to making it a commercial opportunity,” Thompson said.

“I have already got inquiries from overseas including a large consortium in South America that is really quite interested to get involved and take the technology over there.”

POET Systems is a 2017 semi-finalist in the Australian Technologies Competition, which assesses, mentors and promotes companies providing a uniquely Australian take on the future and is open to technologies that have global potential in a range of industries.

Winners will be announced at Technology Showcases in Melbourne and Sydney in October and November.

POET is an acronym for Polymer - Organic - Energy – Treatment.

The first two POET machines will be built at wastewater treatment plants in regional areas of the Australian state of Victoria.

The same microbes will treat the plastic and the water simultaneously. The microbes then die and leave behind liquid and solid biomass, which can be used as fertiliser, and biogas, which can be separated into methane and carbon dioxide.

Thompson, who is based in the South Australian capital Adelaide, said the methane could be used to create heat and energy, possibly to power the wastewater plant, while there was also potential for the carbon dioxide to be captured and reused.

“So basically the plastics go into an anaerobic situation in wastewater where the microbes digest the plastic and create energy,” he said.

“This client in Victoria is big on wastewater treatment plants and after thinking about his methodology – there’s over 550 wastewater treatment plants in Australia and at least half of those would have anaerobic digestion facilities attached so it’s a good opportunity to go down that path.”

Thompson plans to lodge provisional patent documents for the technology in the coming weeks.

He said the system did not impact on existing recycling practices as it targeted plastics destined for landfill and would add a new revenue stream for companies in the waste industry.

“People in the waste industry have already invested heavily in infrastructure so they know how to do the business,” he said.

“If this gives them an additional opportunity to make money and take on a segment which hasn’t been handled before then I’m happy with that.

“We’ve had a look at a number of scenarios and where it actually works as a business model is at a starting point of 20 tonnes a week.

“So everything I’ve designed ready for manufacture here in Australia is based on 20 tonnes a week and I can scale it up larger from there.”

Related news & editorials

  1. 20.02.2018
    20.02.2018
    by      In
    An in-depth analysis of the battery industry in Australia has shown that lithium totals a $2 trillion investment opportunity, and despite investment in other kinds of battery technology, Australia must act or be left behind in lithium tech. 
    The Association of Mining and Exploration Companies (AMEC... Read More
  2. 20.02.2018
    20.02.2018
    by      In
    Lockheed Martin Australia has opened a new $12 million Lockheed Martin Australia House on the edge of Canberra’s Parliamentary Triangle. 
    The new office was opened by Defence Industry Minister Christopher Pyne, who said the company has cemented its ongoing commitment to Australia's defence industry... Read More
  3. 20.02.2018
    20.02.2018
    by      In
    Expressions of interest have now opened for trade works on the Osborne Naval Shipbuilding Precinct infrastructure project, promising up to 600 new construction jobs, and ongoing maintenance procedures. 
    Under the project, new facilities will be required to support the continuous build programs for... Read More
  4. 20.02.2018
    20.02.2018
    by      In
    With 'temporary' demountable structures making up more than one-in-ten classrooms in NSW, it is clear the education system is struggling to keep up with expansion. 
    Facing a future with more than five thousand demountables, many of which remain in place for upwards of ten years, the Centre for... Read More