Permeation and biological treatment of waste gas

摘要

A method of reducing the concentration of at least one gaseous or vapour phase organic compound present in a gaseous stream, wherein said gaseous stream is caused to flow in contact with an interior surface of a substantially water-insoluble selectively permeable sheet, tubular or envelope-type polymeric membrane whose permeability to the said at least one organic compound exceeds its permeability to chloride ion, whilst simultaneously maintaining in contact with an external surface of said membrane an aqueous reaction medium containing biologically active reaction means such as biomass bacteria or algae capable of reacting with said at least one compound after it permeates from the gaseous stream through said membrane from said interior surface thereof to said external surface.