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.
Biofiltration is a relatively new pollution control technology. It is an attractive technique for the elimination of malodorous gas emissions and of low concentrations of volatile organic compounds (VOCs).The most common style biofilter is just a big box.Some can be as big as a basketball court or as small as one cubic yard.t is an attractive technique for the elimination of malodorous gas emissions and of low concentrations of volatile organic compounds (VOCs). The most common style biofilter is just a big box. Some can be as big as a basketball court or as small as one cubic yard.