Decomposition of sulfur compounds by a radiolysis: III. A hybrid system and field application

• Published in: Chemical engineering journal (Lausanne, Switzerland : 1996) Switzerland : 1996), 2015-08, Vol.274, p.9-16
• Main Authors: Son, Youn-Suk, Jung, In-Ha, Lee, Sung-Joo, Kim, Jo-Chun
• Format: Article
• Language: English
• Subjects: Cross flow scrubber; Electron beam; Hybrid system; Hydrogen sulfide; Methyl mercaptan; Sulfur compound
• ISSN: 1385-8947; 1873-3212
• DOI: 10.1016/j.cej.2015.03.122

[Display omitted] •This hybrid system was developed to control odorous compounds.•REs by an EB were H2S>CH3SH>(CH3)2S>(CH3)2S2 at 5–10kGy.•The CF scrubber was sufficient to remove residual compounds and its by-products.•REs of all compounds were about 100% at 2.5kGy in the pilot-scale hybrid system. In this study, a hybrid system combining two different techniques (electron beam and cross flow scrubber) has been developed and applied to control odorous sulfur compounds (hydrogen sulfide, methyl mercaptan, dimethyl sulfide and dimethyl disulfide) in a wastewater treatment facility. Removal efficiencies of sulfur compounds using an electron beam were high in the order of hydrogen sulfide>methyl mercaptan>dimethyl sulfide>dimethyl disulfide when the range of absorbed dose was 5–10kGy. We also found that the liquid/gas ratio at 4.7L/m3 was sufficient to remove residual odorous sulfur compounds and its by-products. Based on these results, a pilot study was carried out. As a result, the removal efficiencies of all target compounds were approximately 100% at 2.5kGy in the pilot-scale hybrid system. It was also found that the levels of NO2 and CO formed by electron beam irradiation were lowered down to the ambient level by the hybrid system.