A four-month pilot study conducted at the Interstate Brands Wonderbread Bakery in Columbus, OH concluded that a two-stage biotrickling filter composed of environmentally-available bacteria immobilized on solid polypropylene fibers reduced ethanol emissions by 85 to 100 percent.
Supercritical fluid extrusion (SCFX) technology, first reported in 1992 by Syed S.H. Rizvi and Steven J. Mulvaney of the Institute of Food Science at Cornell University, combines two high-pressure processes -- supercritical CO2 processing and extrusion -- to extend the capabilities of conventional extrusion technology.
According to a report on "World Beer Containers" from The Freedonia Group, by the end of this year, plastic bottles will emerge as a viable form of beer packaging.