Combination of microwave demulsification, ozone oxidation and biological aerated filter for advanced treatment of oilfield wastewater with low biodegradability

Journal of Water Reuse and Desalination

Zhou, Lei¹  Jiang, Qi²  Kang, Zhi-Hong²  Zhang, Zi-Yi²  Men, Hong-Kun² 

[1]Key Laboratory for Shale Gas Exploration and Assessment, Ministry of Land and Resources, China University of Geosciences, Beijing 100083, China and Beijing Key Laboratory for Unconventional Gas Geologic Evaluation and Development, China University of Geosciences, Beijing 100083, China

[2]School of Energy Resources, China University of Geosciences, Beijing 100083, China

关键词: biodegradation;    microtoxicity;    oilfield wastewater;    petroleum sulfonate;   

DOI  :  10.2166/wrd.2015.002

学科分类：工程和技术（综合）

来源: IWA Publishing

【 摘 要 】

In this study, a combination process was developed in laboratory-scale including microwave demulsification, ozonation, and biological aerated filter (BAF) in series for the purpose of removing pollutants in oilfield wastewater with high microtoxicity. The microwave demulsification treatment removed 63.4% of oil. The ozonation treatment removed 79.3% of petroleum sulfonate, resulting in a substantial reduction of microtoxicity and great enhancement of biodegradability of the wastewater. During the following BAF process, the residual contaminants were effectively degraded by microbes. The final effluent could meet the emission standards for pollutants from petrochemical industry set by China's Environmental Protection Agency.

【 授权许可】

CC BY-NC-ND