The effect of salinity, redox mediators and temperature on anaerobic biodegradation of petroleum hydrocarbons in microbial fuel cells
The effect of salinity, redox mediators and temperature on anaerobic biodegradation of petroleum hydrocarbons in microbial fuel cells
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DOI：
10.1016/j.jhazmat.2014.08.066
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发表时间：
2015-02-11
影响因子：
13.6
通讯作者：
Kyazze, Godfrey
中科院分区：
文献类型：
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作者：
Adelaja, Oluwaseun;Keshavarz, Tajalli;Kyazze, Godfrey
微生物燃料电池（MFC）需要强大的，如果他们被应用在现场的生物修复。本研究调查了温度（20-50摄氏度），盐度（0.5-2.5%（w/v）的氯化钠），氧化还原介质（核黄素和蒽醌-2-磺酸盐，AQS）的使用和长期的补料分批操作（60天）的石油烃混合物（即菲和苯）在MFC的生物降解的影响。性能指标为降解效率、% COD去除率和电化学性能。在盐度为1.5%（w/v）时仍保持良好的电化学性能和降解性能，但当盐度升高至2.5%w/v时，降解率和最大功率密度分别下降了35倍和4倍。与MFC在30 ℃时的性能相比，降解率和最大功率密度在40 ℃时均提高了约2倍，但在40 ℃时急剧下降了4倍。当操作温度升高到50 ℃时折叠。在40 ℃时，最大功率密度为1.15 mW/m2，COD去除率为89.1%，降解率为97.10%;在中等盐度（1%w/v）条件下，最大功率密度为1.06 mW/m2，COD去除率为79.1%，降解率为91.6%。这项工作表明，MFC技术在有效处理石油烃污染场地和炼油厂废水的可能应用。(C)2014爱思唯尔有限公司版权所有。
Microbial fuel cells (MFCs) need to be robust if they are to be applied in the field for bioremediation. This study investigated the effect of temperature (20-50 degrees C), salinity (0.5-2.5% (w/v) as sodium chloride), the use of redox mediators (riboflavin and anthraquinone-2-sulphonate, AQS) and prolonged fed-batch operation (60 days) on biodegradation of a petroleum hydrocarbon mix (i.e. phenanthrene and benzene) in MFCs. The performance criteria were degradation efficiency, % COD removal and electrochemical performance. Good electrochemical and degradation performance were maintained up to a salinity of 1.5% (w/v) but deteriorated by 35-fold and 4-fold respectively as salinity was raised to 2.5%w/v. Degradation rates and maximum power density were both improved by approximately 2-fold at 40 degrees C compared to MFC performance at 30 degrees C but decreased sharply by 4-fold when operating temperature was raised to 50 degrees C. The optimum reactor performance obtained at 40 degrees C was 1.15 mW/m(2) maximum power density, 89.1% COD removal and a degradation efficiency of 97.10%; at moderately saline (1% w/v) conditions the maximum power density was 1.06 mW/m(2), 79.1% COD removal and 91.6% degradation efficiency. This work suggests the possible application of MFC technology in the effective treatment of petroleum hydrocarbons contaminated site and refinery effluents. (C) 2014 Elsevier B.V. All rights reserved.