Zhou Minghua, Wang Wei, Chi Meiling
Key Laboratory of Pollution Processes and Environmental Criteria of Ministry of Education, College of Environmental Science and Engineering, Nankai University, Tianjin, China.
Bioresour Technol. 2009 Oct;100(20):4662-8. doi: 10.1016/j.biortech.2009.05.002. Epub 2009 May 24.
To improve denitrification performance and effective degradation of organic pollutants from micro-polluted groundwater simultaneously, a novel three-dimensional (3D) bio-electrochemical reactor was developed, which introduced activated carbon into a traditional two-dimensional (2D) reactor as the third electrode. The static and dynamic characteristics of the reactor were investigated with special attentions paid to the performance comparison of these two reactors. In the 3D reactor both TOC and nitrate removal efficiency were greatly improved, and the formation of nitrite byproduct is considerably reduced, comparing with that of the 2D reactor. The role of activated carbon biofilm was explored and possible remediation mechanisms for the 2D and 3D reactors were suggested. In such a 3D reactor, the denitrification rate improved greatly to 0.288 mg NO(3)-N/cm(2)/d and the current efficiency could reach as high as 285%. Further, it demonstrated good performance stably against variable conditions, indicating very promising in application for groundwater remediation.
为了同时提高反硝化性能并有效降解微污染地下水中的有机污染物，开发了一种新型的三维（3D）生物电化学反应器，该反应器将活性炭引入传统的二维（2D）反应器中作为第三电极。研究了该反应器的静态和动态特性，并特别关注了这两种反应器的性能比较。与二维反应器相比，三维反应器的总有机碳（TOC）和硝酸盐去除效率均得到显著提高，且亚硝酸盐副产物的生成量大幅减少。探索了活性炭生物膜的作用，并提出了二维和三维反应器可能的修复机制。在这种三维反应器中，反硝化速率大幅提高至0.288 mg NO(3)-N/cm(2)/d，电流效率可达285%。此外，它在可变条件下表现出良好的稳定性，表明在地下水修复应用中极具前景。
