| 摘要 |
<p>Method of bringing gases into contact with compostible or partially composted material, by which the material resting in the form of a mass on a layer of particulate material is traversed by a gas, preferably air, this air being introduced into the mass by gas-distributing means, e.g. a main pipe (1) and a plurality of perforated branch pipes (2), embedded in or covered by the layer of particulate material, and in which the layer comprises a first-part layer (8) of relatively coarse particulate material, intended to serve as a protection for the gas-distributing means and as a distributing filter for the through-flowing gas, and a second-part layer (9) arranged upon the first-part layer and comprising relatively fine particulate material, the second-part layer being intended to distribute the through-flowing gas before the gas is introduced into the compostible or partially composted material. The second-part layer of the layer comprises a mixture of the relatively fine particulate material as ballast material, as well as a binding agent, it having such a particle size distribution and the ingredients being present in such mixing proportions that this second-part layer acquires an open-pore structure having a pressure drop suitable for uniform gas distribution while, at the same time, it is able to withstand the weight of heavy vehicles.</p> |
