Breakthrough science produces eco-plastic without fossil fuels

by Search Gate staff. Published Mon 23 Nov 2009 09:30, Last updated: 2009-11-23
Non-fossil fuel process breakthrough

A team of pioneering scientists have succeeded in producing the polymers used for everyday plastics through bioengineering, rather than through the use of fossil fuel based chemicals.

The groundbreaking research, which may now allow for the production of environmentally conscious plastics, is published in two papers in the journal Biotechnology and Bioengineering to mark the journal's 50th anniversary.

Polymers are molecules found in everyday life in the form of plastics and rubbers. The South Korean team, from the prestigious KAIST University and chemical company LG Chem, led by Professor Sang Yup Lee focused their research on Polylactic Acid (PLA), a bio-based polymer which holds the key to producing plastics through natural and renewable resources.

"The polyesters and other polymers we use everyday are mostly derived from fossil oils made through the refinery or chemical process," said Lee. "The idea of producing polymers from renewable biomass has attracted much attention due to the increasing concerns of environmental problems and the limited nature of fossil resources. PLA is considered a good alternative to petroleum based plastics as it is both biodegradable and has a low toxicity to humans."

Until now PLA has been produced in a two-step fermentation and chemical process of polymerization, which is both complex and expensive. Now, through the use of a metabolically engineered strain of E.coli, the team , have developed a one-stage process which produces polylactic acid and its copolymers through direct fermentation.

This makes the renewable production of PLA and lactate-containing copolymers cheaper and more commercially viable.

"By developing a strategy which combines metabolic engineering and enzyme engineering, we've developed an efficient bio-based one-step production process for PLA and its copolymers," said Lee. "This means that a developed E. coli strain is now capable of efficiently producing unnatural polymers, through a one-step fermentation process,"

This combined approach of systems-level metabolic engineering and enzyme engineering now allows for the production of polymer and polyester based products through direct microbial fermentation of renewable resources.

"Global warming and other environmental problems are urging us to develop sustainable processes based on renewable resources," concluded Lee. "This new strategy should be generally useful for developing other engineered organisms capable of producing various unnatural polymers by direct fermentation from renewable resources".




Sign up to receive Search Gate's FREE weekly newsletter with a review of all the latest green news and views

Opt Out



Comments about Breakthrough science produces eco-plastic without fossil fuels

There are no comments yet on Breakthrough science produces eco-plastic without fossil fuels. Be the first to leave one, enter your thoughts below.

Post a comment






Alert me of replies

You have characters left


 











<








Powered by SEO Rockstars
© All Rights Reserved.