Patent ID: 6946288
Filing Date: 2005-09-20
Classification: B01D,F24F,Y02A,Y02C

Abstract:
1. A ventilation system for an enclosure in which people live, comprising: a first ducting means for ducting fresh air from outside to inside the enclosure; a second ducting means for ducting stale air, comprising a stale air inlet for receiving stale air containing carbon dioxide from inside the enclosure and an exhaust manifold having a first vent to exhaust air outside the enclosure and a second vent in fluid communication with the first ducting means to return clean air into the first ducting means; catalysing means for catalysing hydration of carbon dioxide contained in at least a portion of the stale air into a solution of carbonate ions and hydrogen ions, and thereby removing carbon dioxide from said portion of the stale air and obtaining clean air; the catalysing means being located in the second ducting means upstream from said second vent, said catalysing means comprising a bioreactor comprising air inlet means for receiving said at least a portion of the stale air; dissolving means for dissolving the carbon dioxide contained in said at least a portion of the stale air into an aqueous liquid; an enzymatic reaction chamber filled with carbonic anhydrase or an analog thereof to catalyse the hydration of said dissolved CO evacuating means for evacuating said solution out of the ventilation system.