Raschig Rings for Wastewater Treatment Plant Deodorization
WWTPs often produce odorous gases like hydrogen sulfide (H2S) and ammonia that are discharged directly into the environment, creating an unpleasant odorous gas cloud. Although various physical-chemical methods exist to limit this emission such as absorption, activated carbon adsorption and combustion may help mitigate its presence, these solutions are costly and may not always deliver satisfying results.
Biotrickling filters offer another effective method for deodorizing wastewater, according to Sun et al. [34]’s study on an acid biotrickling filter’s performance against H2S and other volatile sulfur compounds at a municipal waste water treatment facility.
This biotrickling filter utilized for this study consisted of 2″ plastic Pall rings and PU foam cubes in equal proportions, and had enough air flow rate to effectively extract polluted gases from sources within a plant such as dewatering rooms and thickeners, where critical points for odor generation exist. Analysis of polluted gas demonstrated its efficacy; up to 99% of hydrogen sulfide and volatile sulfur compounds present were removed by its operation.
Quality and consistency in raschig rings are critical to their performance in chemical processing, distillation, mass transfer applications. Wisconsin Stamping & Manufacturing’s metal raschig rings are perfect for high capacity and separation efficiency applications requiring these tubular metal pieces. Their arced shape offers low fluid resistance while improving internal distribution with even porosity levels for even further efficiency in chemical processing applications.
