Compost filter for continuous renewal of the filter bed for purification and deodorization of gaseous emissions during composting of solid urban and similar waste

摘要

The filter is consisting of a metal casing (1) filled with continuously renewed fresh compost, closed at the top by a sealed feeding and levelling device (3) and at its bottom by a discharging device to eliminate the depleted compost. The gas to be purified is let through an opening or recess (17) in the lower part of the wall (a) into the casing (1), guided by a set of downward directed horizontal blades (9) then to flow diagonally through the compost and leaving the filter, completely purified, at the upper part of the opposite wall (b) guided by another set of blades (9′).