Pollution Characteristics and Emission Coefficient of Volatile Organic Compounds from Woodwork-making Industry in Zhejiang Province

Abstract

To explore the pollution characteristics and emission coefficient of volatile organic compound (VOCs) released from the woodwork-making industry in Zhejiang province, this paper used the survey data of 310 woodwork enterprises obtained in 2015 to analyze the current VOCs treatment status of woodwork-making industry, and further screened 213 key enterprises to study the emission coefficient of woodwork-making industry. The results showed that more than 94% of woodwork enterprises failed to effectively dispose VOCs since most woodwork enterprises did not have treatment facilities. Moreover, solvent-based materials such as adhesive and paint were still commonly used in woodwork-making industry. Meanwhile, the main pollutants of VOCs in woodwork-making industry were dimethyl benzene, butyl acetate, ethyl acetate, toluene and formaldehyde. Furthermore, the VOCs emission coefficient of woodwork-making industry in Zhejiang was 93.4 g·(million Yuan)-1, while it was affected by the production processes, and the VOCs emission coefficient of enterprises using the coating techniques was higher than that using the adhesive techniques, being 93.6 g·(million Yuan)-1 and 9.5 g·(million Yuan)-1, respectively. Furthermore, the major polluting stage of woodwork-making industry was coating stage, and the VOCs emission coefficient was 31.0 g·(million Yuan)-1 when waterborne and UV coating was used. The highest VOCs emission coefficient was from wooden furniture manufacturers, which could reach 168.5 g·(million Yuan)-1 when solvent-based coatings were used.