Wet Scrubber Analysis of Volatile Organic Compound Removal in the Rendering Industry

摘要: The promulgation of odor control rules, increasing public concerns, and U.S. Environmental Protection Agency (EPA) air regulations in nonattainment zones necessitates the remediation a wide range volatile organic compounds (VOCs) generated by rendering industry. Currently, wet scrubbers with oxidizing chemicals are used to treat VOCs; however, little information is available on scrubber efficiency for many VOCs within process. Portable gas chromatography/mass spectrometry (GC/MS) units were rapidly identify key on-site process streams at two poultry byproduct plants. On-site analysis was found be important, given significant reduction peak areas if samples held 24 hr before analysis. Major consistently identified emissions from plant included dimethyl disulfide, methanethiol, octane, hexanal, 2-methylbutanal, 3-methylbutanal. branched aldehydes, 2-methylbutanal 3-methylbutanal, far most consistent, appearing every sample typically largest fraction VOC mixture. A chlorinated hydrocarbon, methanesulfonyl chloride, outlet high-intensity scrubber, several scrubbing solution, but not consistent basis. Total concentrations noncondensable ranged 4 91 ppmv. At plants, odor-causing compound methanethiol 25 33% 9.6% total (v/v). In one plant, using chlorine dioxide (ClO2) as agent indicated that close 100% removed phase, removal efficiencies 20 80% aldehydes hydrocarbons 23 64% VOCs. second conversion much lower packed-bed measurable only sulfide (20-100%).