Low-cost Biological Odor Treatment Using an Adsorption/ Desorption Concentrator Unit for Reducing Sulfur Emission in Nebraska
List Project Abstract: "The State of Nebraska has an ambient air quality standard for total reduced sulfur (TRS), which consists primarily of hydrogen sulfide (H2S). This application proposes to design and test an economical odor treatment system that will contribute to lower ambient H2S and other gas phase pollutants. The novel concept of the concentrator has the potential for new patents and a broad implementation. Using adsorption/desorption processes, concentrated H2S will result in a smaller reactor volume for reduced direct and operational costs in a bio-trickling filter (BTF). The concentrator will consist of three-adsorption-beds for (1) adsorbing the contaminant, (2) desorbing the loaded bed, and (3) drying the adsorbing bed. Tripling the H2S concentration will result in reducing about 40% of the cost in the biological treatment. The project consists of laboratory experiments and field demonstrations at the Loup Central Landfill to test efficacy. The laboratory experiments will examine the cyclic adsorption and desorption rates of H2S by evaluating raw zeolite and activatedcarbon manufactured from bituminous and coconut sources in granular, powder, and fibrous forms. Regeneration of H2S will be tested by water and air; water will be introduced at different temperatures, pHs, and flowrates."
Project funded by the Nebraska Environmental Trust.