Li, Yu; Lv, Jialin; Xu, Qi; Cai, Yalan; Yang, Hailong; Li, Yingying; Yao, Yanyan; Wang, Wenjuan; Liu, Nan

ATMOSPHERE

2022, 13,

Li, Yu; Lv, Jialin; Xu, Qi; Cai, Yalan; Yang, Hailong; Li, Yingying; Yao, Yanyan; Wang, Wenjuan; Liu, Nan

Volatile organic compounds (VOCs) from the pharmaceutical and chemical industries have been a matter of concern for some years in China. Achieving efficient degradation of chlorobenzene (CB) in waste gas is difficult because of its high volatility and molecular stability. A DBD (dielectric barrier discharge) biological method was proposed to treat chlorobenzene, aiming to control high operating costs and prevent secondary pollution. In this investigation, a DBD biological method was introduced to deal with chlorobenzene by optimization of process parameters. The results showed that the degradation efficiency of chlorobenzene was close to 80% at a hydraulic retention time (HRT) of 85 s when the inlet concentration was 700 mg center dot m(-3) for the biological method. The degradation efficiency of chlorobenzene reached 80% under a discharge voltage of 7 kV, an inlet concentration of 700 mg center dot m(-3) and an HRT of 5.5 s. The degradation efficiency of an integrated system can be increased by 15-20% compared with that of a single biological system. Therefore, this method can be used as a new way to address chlorobenzene pollution in the pharmaceutical and chemical industries.