[DIYbio] PLA biodegradation cocktail for 3D printing?

https://groups.google.com/d/msg/ultimaker/8s1bq_9LsRM/VXz40PTjJq8J
"I've actually been looking into using PLA and PCL for a product I'm going to launch in the new year, so I've been learning about the biochemistry for their decomposition because... well... I'm a nerd. The problem with PLA is that really isn't as biodegradable as one might think, but it can be none the less (which is a far cry that what ABS can claim). To make a truly safe and environmentally friendly method of removing PLA supports, you would want to use a combination of a hydrolase (either/or a lipase and protease... protease seems to be best) and a polymerase to break down the polymer. These are the enzymes that fungi and bacteria use to catalyze the decomposition of the PLA into to its base units. At best PLA isn't overly biodegradable, so using the fungi alone would take a while. You could isolate and separate the hydrolase and polymerase, disperse them in water at relatively concentrated levels and use them as a bath (in theory they should last forever if you don't denature them). The best fungi for this (and seemingly the only fungi that can completely breakdown PLA) seems to be Tritirachium album but aside from a couple of us, who around here could get their hands on that? Here's a fun fact though: the second best fungi for PLA decomposition is Penicillin roqueforti which is your friendly neighborhood bread mold! This is the same fuzzy stuff that grows on your bread if you leave it too long and is what makes blue cheese blue. If there is a biologist in our midst with some free time, they might be able to get a culture to pump out the polymerase and protease into a solution that we could dip our parts into (heated up to the right activation temperature of course). If you feed the culture gelatin you might be able to spur the secretion of the polymerase."