Efficiency and microbial community characteristics of strong alkali ASP flooding produced water treated by composite biofilm system

Frontiers in Microbiology

Microbiology

Min Zhao¹  Dong Wei¹  Zhongting Ma²  Chunying Li³  Li Wei⁴  Xinxin Zhang⁴ 

[1] College of Life Science, Northeast Forestry University, Harbin, Heilongjiang, China;PetroChina Karamay Petrochemical Co., Ltd., Karamay, China;School of Energy and Civil Engineering, Harbin University of Commerce, Harbin, Heilongjiang, China;State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, Heilongjiang, China;Guangzhou HKUST Fok Ying Tung Research Institute, Guangzhou, Guangdong, China;

关键词: produced water;    moving bed biofilm reactor;    microfiltration membrane;    microbial community;    ASP flooding;   

DOI  :  10.3389/fmicb.2023.1166907

 received in 2023-02-15, accepted in 2023-05-05,  发布年份 2023

来源: Frontiers

【 摘 要 】

Strong alkali alkali-surfactant-polymer (ASP) flooding produced water is a by-product of oil recovery, and it is a stable system composed of petroleum, polyacrylamide, surfactant, and inorganic salts. Efficient, green, and safe ASP produced water treatment technology is essential for oilfield exploitation and environmental protection. In this study, an anaerobic/anoxic/moving bed biofilm reactor with a microfiltration membrane was established and assessed for the real strong alkali ASP flooding produced water (pH 10.1–10.4) treatment. The results show that the average removal rates of COD, petroleum, suspended solids, polymers and surfactants in this process are 57, 99, 66, 40, and 44%, respectively. GC-MS results show that most of the organic compounds such as alkanes and olefins in the strong alkali ASP produced water are degraded. Microfiltration membrane can significantly improve the efficiency and stability of sewage treatment system. Paracoccus (AN), Synergistaceae (ANO) and Trichococcus (MBBR) are the main microorganisms involved in the degradation of pollutants. This study reveals the potential and adaptability of composite biofilm system in treating the produced water of strong alkali ASP produced water.

【 授权许可】

Unknown   
Copyright © 2023 Wei, Zhang, Li, Ma, Zhao and Wei.