Performance Study on the Treatment of Gas-born MEK Generated from a Copper Clad Laminate by A Pilot Biofilter Packed with Fernchips

• Main Authors: Kuo-Liang Chang, 蔣國良
• Other Authors: Chih-Ju Jou
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/86983632164592898506

碩士 === 國立高雄第一科技大學 === 環境與安全衛生工程所 === 97 === Removing methyl ethyl ketone (MEK) from the emission of industrial processes manufacturing copper clad laminate (CCL) using a biological trickling filter packed with fern chips as the media was studied. Data collected on the removal efficiency, unit removal capacity, and conversion of MEK into carbon dioxide will be used for future design and operation of a full-scale treatment process. The two-stage pilot biological filter was made of acrylic plastic material with inside dimensions of 0.40 m × 0.40 m × 0.70 mH to provide 76.8 s. retention time. Concentrations of MEK in the gaseous influent varied from 16 mg/Nm3 to 4972 mg/Nm3 (average 905.4 mg/Nm3 ); the organic loading rates were between 0.75 g MEK/Nm3.hr and 233 g MEK/Nm3.hr (average 42.4 g MEK/m3.hr). The results show that the effluent contains 0 mg/Nm3 to 2350 mg/Nm3 MEK (average 222.9 g mg/Nm3) with 88.8% average removal efficiency. When the organic loading rate (L) is between 0 g MEK/Nm3.hr and 50 g MEK/Nm3.hr, the volumetric removal capacity for the media (K) varies from 0 g MEK/Nm3.hr to 50 g MEK/Nm3.hr. There is a linear relationship between K and L values, i.e. K = 0.96 L, indicating that the removal efficiency is greater than 96%. Additionally, data on the yield of CO2 reveal that all removed MEK has been converted to CO2 . Compared with the rotary recuperative thermal oxidizer (RRTO) process that is currently used for treating emission containing organic substances, the biofilter will save about NT$ 7.5 millions (US 25 Millions) while reducing the emission of 890 tons of CO2 per year.