containers immediately after transport to recycling plants may resolve this odor problem. Pungent and burned plastic malodor were frequently noted at the boundaries of melting and powdering plants, where odor concentrations were measured at 100–229 OC. According to Taiwan EPA regulations and standards, the maximum allowable odor concentration at the boundaries of any plant in industrial and agricultural regions should not exceed 50 OC (lessthan 20 OC in industrial areas in Korea). In this study, most of the odor concentration at the boundaries of plastic recycling plants exceeded Taiwan EPA standards, particularly melting and powdering plants, which indicated the need for improved odor control.
3.2. VOCs and odor concentration inside the PVC, PE and PP plastic
waste recycling plants Thirty-seven volatile compounds including chlorinated compounds, hydrocarbons, ketones, esters, aldehydes and organic nitriles were detected in the indoor air sampled from the PVC plastic waste recycling plant (Table 3). In particular of the harmful chlorinated compounds, sixteen chemicals were detectable at total concentrations of 245–553 lg m 3; most of which were vinyl chloride,chloroform and trichloroethylene. The concentrations of toluene,4-methyl-2-pentanone, methyl methacrylate and acrolein were the highest respective hydrocarbons, ketones, esters and aldehydes
containers immediately after transport to recycling plants may resolve this odor problem. Pungent and burned plastic malodor were frequently noted at the boundaries of melting and powdering plants, where odor concentrations were measured at 100–229 OC. According to Taiwan EPA regulations and standards, the maximum allowable odor concentration at the boundaries of any plant in industrial and agricultural regions should not exceed 50 OC (lessthan 20 OC in industrial areas in Korea). In this study, most of the odor concentration at the boundaries of plastic recycling plants exceeded Taiwan EPA standards, particularly melting and powdering plants, which indicated the need for improved odor control.3.2. VOCs and odor concentration inside the PVC, PE and PP plasticwaste recycling plants Thirty-seven volatile compounds including chlorinated compounds, hydrocarbons, ketones, esters, aldehydes and organic nitriles were detected in the indoor air sampled from the PVC plastic waste recycling plant (Table 3). In particular of the harmful chlorinated compounds, sixteen chemicals were detectable at total concentrations of 245–553 lg m 3; most of which were vinyl chloride,chloroform and trichloroethylene. The concentrations of toluene,4-methyl-2-pentanone, methyl methacrylate and acrolein were the highest respective hydrocarbons, ketones, esters and aldehydes
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