
In 2000, the USA produced three million tons of polystyrene, that magical substance that makes up packing peanuts. The problem with polystyrene, is that it tends to hang around. Scientists have discovered a bacteria that can convert polystyrene into PHA, a bio-degradable plastic, that can then be reused.
biologists at the University College Dublin in Ireland have found that a strain of Pseudomonas putida can exist quite happily on a diet of pure styrene oil–the oil remnant of superheated Styrofoam–and, in the process, turn the environmental problem into a useful, biodegradable plastic.
But the bacteria thrived on this new diet, turning 64 grams of undistilled styrene oil into nearly 3 grams of additional bacteria. In the process, the bacteria stored 1.6 grams of the energy of the styrene oil as a biodegradable plastic called polyhydroxyalkanoates, or PHA. This plastic can stand up to heat but also breaks down more naturally in the environment than petroleum-based products.
sciam.com
via d