Patent ID: 6479276
Filing Date: 2002-11-12
Classification: B01D,Y02A,Y10S

Abstract:
A filter apparatus for processing air laden with volatile organic compounds, said apparatus comprising:a first wall means defining a first filter chamber and a second filter chamber, a first air inlet for admitting air to the first filter chamber, a first air outlet for exhausting air from the first filter chamber, a second air inlet, connected to said first air outlet, for admitting air leaving the first filter chamber to the second filter chamber, and a second air outlet for exhausting air from the second filter chamber, a biologically inert filter media in the first filter chamber, a biologically active filter media in the second filter chamber, a water supply means for supplying water to an upper region of the first filter chamber, a second wall means defining a sump for receiving water from a lower region of the second filter chamber, and a recirculation means for feeding water from the sump to the water supply means, whereby water received from the lower region of the second filter chamber is supplied to the upper region of the first filter chamber for wetting the biologically inert filter media.