Shale gas produced water treatment using innovative microbial capacitive desalination cell.
Shale gas produced water treatment using innovative microbial capacitive desalination cell.
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DOI：
10.1016/j.jhazmat.2014.10.015
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发表时间：
2015-02
影响因子：
13.6
通讯作者：
Zachary A. Stoll;Casey Forrestal;Z. Ren;P. Xu
中科院分区：
文献类型：
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作者：
Zachary A. Stoll;Casey Forrestal;Z. Ren;P. Xu
非常规油气生产的快速发展产生了大量需要处理的废水，引起了重大的环境和公共卫生问题。由于采出水的石油碳氢化合物浓度高，含盐量高，因此处理和有效利用采出水面临许多挑战。本研究的目的是研究利用集成电容去离子的生物电化学系统——微生物电容脱盐电池（MCDC）处理实际页岩气产出水的可行性。阳极中有机化合物的微生物降解产生了一种电势，推动了采出水的脱盐。吸附和生物降解导致反应器中溶解有机碳的总有机去除率为6.4 mg / h， MCDC每克碳电极每小时从采出水中去除36 mg盐。这项研究是一个概念证明，MCDC可以在没有外部能量输入的情况下将有机降解与污染水的脱盐结合起来。
The rapid development of unconventional oil and gas production has generated large amounts of wastewater for disposal, raising significant environmental and public health concerns. Treatment and beneficial use of produced water presents many challenges due to its high concentrations of petroleum hydrocarbons and salinity. The objectives of this study were to investigate the feasibility of treating actual shale gas produced water using a bioelectrochemical system integrated with capacitive deionization—a microbial capacitive desalination cell (MCDC). Microbial degradation of organic compounds in the anode generated an electric potential that drove the desalination of produced water. Sorption and biodegradation resulted in a combined organic removal rate of 6.4 mg dissolved organic carbon per hour in the reactor, and the MCDC removed 36 mg salt per gram of carbon electrode per hour from produced water. This study is a proof-of-concept that the MCDC can be used to combine organic degradation with desalination of contaminated water without external energy input.