Concrete Canoe. The Greek polymath Archimedes is said to have solved the mystery of buoyancy in a bathtub. Even if the story is apocryphal, his principle isn't: If an object weighs less than the water it displaces, it won't sink. Even concrete can float. Materials scientist Joseph-Louis Lambot built a concrete dinghy featured in the 1855 World's Fair.
Definition of BIOFILTER. : a filter bed in which sewage is subjected to the action of microorganisms that assist in decomposing it. ADVERTISEMENT. 2bi- + filter.rigin of BIOFILTER. 2bi- + filter. This word doesn't usually appear in our free dictionary, but the definition from our premium Unabridged Dictionary is offered here on a limited basis.
Background and Introduction. Biological treatment or biofiltration is now the mainstay of wastewater management systems. Patent applications for odor control using biofiltration have been filed since the 1950s for soil filters and large biological trickling filter plants.Biofilters have been designed primarily for odor control at wastewater treatment plants, rendering plants, and composting operations.atent applications for odor control using biofiltration have been filed since the 1950s for soil filters and large biological trickling filter plants. Biofilters have been designed primarily for odor control at wastewater treatment plants, rendering plants, and composting operations.