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首页> 外文期刊>Bioprocess and Biosystems Engineering >Regulation of different electron acceptors on petroleum hydrocarbon biotransformation to final products in activated sludge biosystems
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Regulation of different electron acceptors on petroleum hydrocarbon biotransformation to final products in activated sludge biosystems

机译：活性污泥生物系统中不同电子受体对石油烃生物转化为最终产物的调控

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摘要

The types and concentrations of electron acceptor are the significant factors influencing the oxidation and biotransformation of organic matter in the process of pollutant biodegradation. Regulation of O-2, SO42- and NO3- as electron acceptors on petroleum hydrocarbon biotransformation to final products was studied using the multiple methods including mesoscale biodegradation experiments, thermodynamic theoretical calculations and stoichiometric analyses. Petroleum hydrocarbon biodegradation ratio (PHBR) rose from 64.7 to 82.4% with dissolved oxygen (DO) (3-5 mgL(-1)). PHBR increased from 57.4 to 66.1% in SO42--reducing biosystems and rose from 65.0 to 77.9% in NO3--reducing biosystems. Carbon balance was verified in different cultures. The shared functional microorganisms in different biosystems included Candida, Rhodococcus, Pseudomonas, Ochrobactrum, Marinobacter, Bacillus, Azoarcus, Alcanivorax, Acinetobacter. Pandoraea, Enterobacter and Burkholderia in anaerobic biosystems preferred to use NO3- and SO42- as electron acceptors for metabolism, and order of availability followed: NO3- SO42-. Thermodynamic constraint showed that potentials of alkanes biotransformation to methane through hydrogenotrophic and acetoclastic methanogenesis in NO3--reducing biosystems were 7.27-7.73 and 7.25-7.70 times larger than those of SO42--reducing biosystems, respectively. Metabolism equations of microorganisms proved that anabolism and catabolism on alkanes were feasible. This work provides a support for studying the biochemical process of petroleum hydrocarbon biotransformation and lays a foundation for the realization of oil-containing wastewater bioremediation.
机译：电子受体的种类和浓度是影响污染物生物降解过程中有机物氧化和生物转化的重要因素。研究了O-2，SO42-和NO3-作为电子受体对石油烃生物转化为最终产物的调控，包括中尺度生物降解实验，热力学理论计算和化学计量分析。含溶解氧（DO）（3-5 mgL（-1））的石油烃生物降解率（PHBR）从64.7提高到82.4％。在减少SO42的生物系统中，PHBR从57.4％增加到66.1％，在减少NO3的生物系统中，PHBR从65.0增加到77.9％。碳平衡已在不同文化中得到验证。不同生物系统中共有的功能微生物包括念珠菌，红球菌，假单胞菌、,骨，马林杆菌，芽孢杆菌，固氮菌，Alcanivorax，不动杆菌。厌氧生物系统中的潘多拉菌，肠杆菌和伯克霍尔德菌优选使用NO3-和SO42-作为新陈代谢的电子受体，其有效性顺序为：NO3-> SO42-。热力学约束表明，在还原NO3的生物系统中，通过氢营养和乙酰碎裂甲烷化作用将烷烃生物转化为甲烷的潜力分别是还原SO42的生物系统的7.27-7.73和7.25-7.70倍。微生物的代谢方程式证明烷烃的合成代谢和分解代谢是可行的。这项工作为研究石油烃生物转化的生化过程提供了支持，为实现含油废水的生物修复奠定了基础。

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  • 来源
    《Bioprocess and Biosystems Engineering》 |2019年第4期|643-655|共13页
  • 作者

    Zhao Lanmei; Zhang Congcong; Li Haoshuai; Bao Mutai; Sun Peiyan;

  • 作者单位

    Ocean Univ China, Key Lab Marine Chem Theory & Technol, Minist Educ, Inst Adv Ocean Study, Qingdao 266100, Shandong, Peoples R China|Ocean Univ China, Coll Chem & Chem Engn, Qingdao 266100, Shandong, Peoples R China;

    Univ Autonoma Barcelona, Dept Engn Quim Biol & Ambiental, Escola Engn, E-08193 Barcelona, Spain;

    Ocean Univ China, Key Lab Marine Chem Theory & Technol, Minist Educ, Inst Adv Ocean Study, Qingdao 266100, Shandong, Peoples R China|Ocean Univ China, Coll Chem & Chem Engn, Qingdao 266100, Shandong, Peoples R China;

    Ocean Univ China, Key Lab Marine Chem Theory & Technol, Minist Educ, Inst Adv Ocean Study, Qingdao 266100, Shandong, Peoples R China|Ocean Univ China, Coll Chem & Chem Engn, Qingdao 266100, Shandong, Peoples R China;

    State Ocean Adm, Key Lab Marine Spill Oil Identificat & Damage Ass, Qingdao 266033, Shandong, Peoples R China|State Ocean Adm, North China Sea Environm Monitoring Ctr, Qingdao 266033, Shandong, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Petroleum hydrocarbon; Biotransformation; Electron acceptor; Functional microorganism; Thermodynamic constraint;

    机译：石油烃;生物转化;电子受体;功能微生物;热力学约束;

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