Patent Number: 
Section: claims

1. A method for filtering gas effluents from an industrial installation comprising the following steps:providing from an industrial installation a gas effluent comprising a mixture of gases;filtering harmful elements from the gas effluent by sifting, sorption and/or diffusion membrane separation through a plurality of membranes each with a tubular geometry, an inner wall, an outer wall, pores varying in dimension radially and axially, and dimensions of the pores decreasing in the direction of effluent gas flow, with each membrane filtering a specific harmful element of the harmful elements to obtain filtered specific harmful elements and processed gas effluent with a purification coefficient greater than 100;sorting the filtered specific harmful elements and storing the filtered specific harmful elements in separate storage reservoirs; anddischarging the processed gas effluent. 2. The method according to claim 1, wherein the gas effluent provided comprises fumes from an industrial installation. 3. The method according to claim 1, wherein the gas effluent provided comprises fumes from an industrial installation during operation. 4. The method according to claim 1, wherein the gas effluent provided is extracted from a ventilation system. 5. The method according to claim 1, wherein the gas effluent provided comprises fumes from a fire. 6. The method according to claim 1, wherein the gas effluent provided comprises components from fission products. 7. The method according to claim 1, wherein the gas effluent provided has a temperature greater than 40° C. 8. The method according to claim 1, wherein the gas effluent provided has a processing flow rate greater than 1 kg/s. 9. The method according to claim 1, wherein the gas effluent provided has a pressure of more than 1 bar. 10. The method according to claim 1, wherein said storage reservoirs are gas storage reservoirs containing zeolites. 11. The method according to claim 1, wherein the membranes are formed of ceramic, aramid fiber and/or a polymer. 12. The method according to claim 1, wherein the method is operable at a pressure of 1.5 bars or greater, without use of energy external from that of the industrial installation.