Process for the purification of gases escaping from a manhole shaft and wastewater biofilter arrangement suitable for this purpose

摘要

The invention relates to a method for purifying gases escaping from a gully hole ( 1 ), particularly escaping from a sewer ( 8 ) guided at the bottom ( 7 ) of the gully hole ( 1 ) by means of a biofilter that is arranged inside the gully hole ( 1 ) in such a manner that the gases flow through it before they leave the gully hole ( 1 ). The biofilter is mounted at such a distance to the sewer ( 8 ) that its temperature and moisture are substantially influenced by the waste water ( 17 ) present in the sewer ( 8 ).