Ozonation of Odorous Compounds in Gases Emitted from Rubber Processing Industries

摘要: This study aimed at the removal of odorous compounds in gases emitted from rubber processing industries. Simulated gas for test was prepared by mixing fresh air and an drawn oven which a sample powder kept either 160°C (for thermal plastic rubber) or 200°C setting rubber). The then premixed with definite amount ozone-enriched introduced into contact system. system consists two sieve-plate columns connected series each column has four 1-L chambers. Depending on without introducing circulating scrubbing water columns, oxidation reaction could be wet dry one. Results indicate got better performances than former 97 over 90% VOCs (volatile organic compounds) intensity removal, respectively, operation conditions initial ozone concentration 4.0 ppm, THC (total hydrocarbon) concentrations 6.5–10.3 ppm (methane equivalent), temperature 37.3°C, empty bed retention time (EBRT) 12 s, liquid/gas rate ratio 0.01 m 3 /m . With similar to those cited above, odor (dilutions threshold, D/T) reduced 1,738–3,090 31–98 EBRTs 11.4–14.5 s. Activated carbon is effective both physical chemical removals residual VOCs, compounds, effluent ozonation Economical analysis indicates that around US$ 0.16 required treating 1,000 tested foul proposed process.