Bio-electrochemical remediation of real field petroleum sludge as an electron donor with simultaneous power generation facilitates biotransformation of PAH: Effect of substrate concentration
Bio-electrochemical remediation of real field petroleum sludge as an electron donor with simultaneous power generation facilitates biotransformation of PAH: Effect of substrate concentration
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DOI：
10.1016/j.biortech.2012.01.128
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发表时间：
2012-04-01
影响因子：
11.4
通讯作者：
Mohan, S. Venkata
中科院分区：
文献类型：
--
作者：
Chandrasekhar, K.;Mohan, S. Venkata
在生物电化学处理(BET)系统中，研究了可变有机负荷(OLs)作用下的自生电微环境对现场石油污泥的修复作用。不同有机污染物下的运行对生电活性和修复效率都有明显的影响。总石油烃(TPH)及其芳烃组分在OL4操作下的去除效果较好，OL3、OL2、OL1和对照次之。在BET操作过程中，自诱导生物势和相关的多重生物电催化反应促进了高环芳烃(5-6)向低环芳香化合物(2-3)的生物转化。在BET操作过程中，沥青质和NSO组分的去除可以忽略不计。与其他三种操作相比，在OL1记录到更高的电活动(343 mV；53.11 mW/m(2)，100欧加)。用厌氧培养对阳极微生物的生物强化记录了在OL4操作时增强的产电活性。伏安曲线、塔菲尔分析和挥发性脂肪酸的产生与观察到的发电量和降解效率一致。(C)2012爱思唯尔有限公司。保留所有权利。
Remediation of real-field petroleum sludge was studied under self-induced electrogenic microenvironment with the function of variable organic loads (OLs) in bio-electrochemical treatment (BET) systems. Operation under various OLs documented marked influence on both electrogenic activity and remediation efficiency. Both total petroleum hydrocarbons (TPH) and its aromatic fraction documented higher removal with OL4 operation followed by OL3, OL2, OL1 and control. Self-induced biopotential and associated multiple bio-electrocatalytic reactions during BET operation facilitated biotransformation of higher ring aromatics (5-6) to lower ring aromatic (2-3) compounds. Asphaltenes and NSO fractions showed negligible removal during BET operation. Higher electrogenic activity was recorded at OL1 (343 mV; 53.11 mW/m(2), 100 Omega) compared to other three OLs operation. Bioaugmentation to anodic microflora with anaerobic culture documented enhanced electrogenic activity at OL4 operation. Voltammetric profiles, Tafel analysis and VFA generation were in agreement with the observed power generation and degradation efficiency. (C) 2012 Elsevier Ltd. All rights reserved.