China Petroleum Processing & Petrochemical Technology ›› 2021, Vol. 23 ›› Issue (3): 151-160.

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The preparation of modified enteromorpha-immobilized microbial agent and the research on diesel removal performance

Yang Yuping1; Li Nana1; Duan Weichao2; An Chenye1; Xue Jianliang1; Jiang Qing1; Cheng Dongle3; Shen Chanchan4#br# #br#   

  1. 1. College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590;
    2. Qingdao Oasis Environmental & Safety Technology Co., Ltd., Qingdao 266555;
    3. Centre for Technology in Water and Wastewater, School of Civil and Environmental
    Engineering, University of Technology Sydney, Sydney, NWS 2007, Australia;
    4. College of City and Architecture Engineering, Zaozhuang University, Zaozhuang 277160
  • Received:2021-04-22 Revised:2021-05-19 Online:2021-09-30 Published:2021-09-27
  • Supported by:

Abstract: In order to improve the application effect of immobilization technology in the treatment of marine oil spills, we used sodium dodecylbenzene sulfonate (SDBS) as the modifier to modify enteromorpha by dipping method. Enteromorpha modified by SDBS (SDBS-E) served as an adsorption carrier material for immobilization. At the same time, a marine degrading bacteria Sp8 (Shewanella algae) was selected as the research object. Sodium alginate was used as the embedding carrier, and anhydrous calcium chloride was used as the cross-linking agent to prepare the SDBS-E immobilized microbial agent by embedding method. Compared with the degradation rate of free bacteria (78.87%), the removal rate of diesel by SDBS-E immobilized microbial agent increased to 90.39%. The removal pathway of diesel by SDBS-E immobilized microbial agent was studied, and the results showed that the pathway mainly included surface adsorption, internal uptake and biodegradation. The early stage relied on surface adsorption, and the later relied on biodegradation. The removal of diesel by SDBS-E immobilized microbial agent conformed to the quasi-first-order degradation kinetic model.

Key words: bioremediation, immobilization, diesel degradation, enteromorpha, modification