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.
Biochar is a new word for a very old, familiar substance: charcoal. But biochar is special charcoal made by special processes to use in soil, not for fuel or filtration.Charred carbon is made by heating biomass with no or little oxygen.Pyrolysis is a technique to cook biomass (woody, weedy, manure) at low temperature (500-900 C) in a retort.or optimum growth, health & nutrient density. Biochar is a new word for a very old, familiar substance: charcoal. But biochar is special charcoal made by special processes to use in soil, not for fuel or filtration. Charred carbon is made by heating biomass with no or little oxygen.