Inactivation of Bacteria in Oil Field Injected Water by a Pulsed Plasma Discharge Process

XIN Qing (辛青); LI Zhongjian (李中坚); LEI Lecheng (雷乐成); YANG Bin (杨彬)

doi:10.1088/1009-0630/18/9/11

Plasma Science and Technology > 2016 > 18(9): 943-949. > DOI: 10.1088/1009-0630/18/9/11

XIN Qing (辛青), LI Zhongjian (李中坚), LEI Lecheng (雷乐成), YANG Bin (杨彬). Inactivation of Bacteria in Oil Field Injected Water by a Pulsed Plasma Discharge Process[J]. Plasma Science and Technology, 2016, 18(9): 943-949. DOI: 10.1088/1009-0630/18/9/11

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Inactivation of Bacteria in Oil Field Injected Water by a Pulsed Plasma Discharge Process

1 Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China 2 College of electronic information, Hangzhou Dianzi University, Hangzhou 310018, China

Funds: supported by Zhejiang Province Welfare Technology Applied Research Project of China (No. 2014C31137), National Natural Science Foundation of China (Nos. 21436007 and U1462201), and the Fundamental Research Funds for the Central Universities of China (No. 2015QNA4032)

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Received Date: October 19, 2015

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Abstract

Abstract

Pulsed plasma discharge was employed to inactivate bacteria in the injection water for an oil field. The effects of water conductivity and initial concentration of bacteria on elimination efficiency were investigated in the batch and continuous flow modes. It was demonstrated that Fe ²⁺ contained in injection water could enhance the elimination efficiency greatly. The addition of reducing agent glutathione (GSH) indicated that active radicals generated by pulsed plasma discharges played an important role in the inactivation of bacteria. Moreover, it was found that the microbial inactivation process for both batch and continuous flow mode well fitted the model based on the Weibull’s survival function.
- high-voltage pulsed discharge,
- water injection,
- bacteria inactivation,
- oil industry

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