Continuous flow, packed column biological reactor with rotated packing and bio-mass accumulation control, for treating pollutant contaminated air and gases

摘要

If the packing / biomass composite weight exceeds 150% of the clean packing weight, the device is flooded and its rotation speed substantially increased, or it is subject to hydraulic percussive effects, to dislodge and remove the bio-mass from the packing. Pollutants are removed from gases by means of a packing irrigated by nutrient solution and supporting a growth of bio-mass. The irrigation rate is not less than 1m3/ m2h, and the weight of the carrier packing plus bio-mass is not allowed to exceed 110% of the clean packing weight. The system pressure loss is also maintained at 1 mbar max. An Independent claim is included for an arrangement is in which a multiple segment packing is rotated, about a common linear axis, at less than 50 rpm, while the contaminated gas is passed through the trickle irrigated packing. The packing may be plastics or corrosion resistant metal structured type or a parallel arrangement of perforated tubes. The bio-mass build-up is monitored via the load exerted on the shaft bearing (7).