Abstract: A removable floor drain odor control device which fits into standard floor drains of various sizes and acts to reduce or eliminate odors emitted from floor drains through use of a washable and regenerable carbon-based adsorbent. The preferred carbon-based adsorbents is a catalytically-active carbonaceous char, with the Centaur.TM. carbon being most preferred.

Abstract: An apparatus and process is provided for the removal of hydrogen sulfide from gases and for restoration of hydrogen sulfide removal capacity in nitrogen-treated carbonaceous chars which have become exhausted for hydrogen sulfide capacity when used for the removal of hydrogen sulfide from gas streams. The apparatus has a matrix of removable canisters which contain the nitrogen-treated carbonaceous chars. This process entails directing the gas containing hydrogen sulfide through the canister, washing the spent carbonaceous char with water by flushing/dynamic washing through the canister to remove the majority of the hydrogen sulfide reaction products. By the use of this process a significant proportion of the original hydrogen sulfide capacity of the nitrogen-treated carbonaceous char is recovered and the canisters can be recycled a large number of times.

Abstract: The present invention relates to a lightweight and durable flexible-walled adsorber vessel that may be a freestanding unit, may be hung from an overhead support frame or ceiling, may float or be submersed in a body of liquid, or otherwise be suspended during use. The flexible adsorber of the present invention utilizes an internal screen, mesh, pallet or similar means to support carbon or other porous filter media so as to permit the pressurized or unpressurized removal of undesirable vapors, liquids or solids that may be present in streams of gas or liquid. Embodiments of the flexible adsorber are capable of supporting filter media weighing a ton or more, can resist deterioration in the presence of a variety toxic chemicals and/or corrosive agents, and can serve as a shipping container before or after use.