餐厨垃圾处理工艺中排放VOCs的研究

摘要

为研究餐厨垃圾处理工艺中排放VOCs释放特征,对南方某市某餐厨垃圾处置企业进行布点采样,并对样品成分含量测定与分析.结果表明:餐厨垃圾处理过程中释放VOCs 70多种,包含烷烃、烯烃、萜烯、卤代烃、芳香烃、硫化物及含量最高的含氧有机物.芳香烃、卤代烃以及烷烃主要来源于原始垃圾;含硫化合物、烯烃、萜烯和含氧有机物主要来自后续处理过程.烷烃中戊烷和异丁烷的释放质量浓度较大,分别能达到0.3639,0.1281 mg/m3;烯烃中丙烯释放质量浓度最大,为0.1483 mg/m3;含硫化合物中硫化氢的释放质量浓度最大,为0.1282 mg/m3;芳香烃中甲苯释放浓度最大,为0.0371 mg/m3;萜烯类化合物中柠檬烯释放质量浓度最大;卤代烃中主要释放物质为二氯甲烷和1,2-二氯乙烷;含氧有机物中乙醇释放质量浓度最大,为14.3907 mg/m3.%In this study, the samples were co llected by distribution sampling and analyzed from the restaurant garbage disposal enterprise in the southern city of China. There are 70 species of VOCs that are discharged from treating process, containing alkanes, alkenes, terpenes, halogenated hydrocarbon, aromatic hydrocarbon, sulfur and the maximum content of oxygen-containing organic compounds. Aromatic hydrocarbon, halogenated hydrocarbon and alkanes are mainly came from raw waste, while sulfur compounds, alkenes, terpenes and oxygen-containing organic compounds are rooted in the follow-up process. The concentration of pentane and isobutane in the alkene are 0.3639 mg/m3 and 0.1281 mg/m3 respectively, the maximum concentration of propylene is 0.1483 mg/m3. The concentration of hydrogen sulfide in the sulfur compounds is the highest, 0.1282 mg/m3, and the maximum release concentration of toluene was 0.0371 mg/m3. The release of limonene was the largest in terpenes. The main released substances in the halogenated hydrocarbons were dichloromethane and 1,2-dichloroethane. The maximum concentration of ethanol was 14.3907 mg/m3 in oxygen-containing organic matter.