摘要
Abstract
The water washing-biofilter process was used to treat dust-laden exhaust waste gases from the tobacco primary processing at a tobacco company in Fujian.In this paper,the process design and operation were introduced,the removal efficiency of volatile organic compounds(VOCs),odor concentration,and non-methane total hydrocarbons(NMTHC)in the waste gases during different seasons were examined,and the removal of primary odor components in the waste gases was analyzed.Besides,the techno-economic analysis was conducted on the process.The results show that under the conditions of an airflow rate of 10 000 m3/h,a VOCs volume fraction of(20-25)×10-6,an odor concentration of 800-1 000,and an NMTHC mass concentration of 500-700 mg/m3,the annual average removal rates of VOCs,odor concentration,and NMTHC in the treated waste gas are 66.5％,67.2％,and 93.5％,respectively.The annual average odor concentration is 276.5,far below the emission requirements specified in the GB 14554-1993.After treatment,the mass concentrations of the primary odor components in the waste gas,3-pentanone and phthalic acid,were reduced to 0.04 mg/m³ and 0.03 mg/m3,with removal rates of 92.6％and 93.8％,respectively.The process is easy to operate and stable in performance,with a treatment cost of approximately 14 yuan per 10 000 m3 of waste gases.关键词
烟草废气/恶臭气体/水洗法/生物滤池Key words
waste gas from tobacco industry/malodorous gases/water washing method/biofilter分类
环境科学
