Nanosecond pulse used to enhance the electrocoagulation of municipal wastewater treatment with low specific energy consumption
Nanosecond pulse used to enhance the electrocoagulation of municipal wastewater treatment with low specific energy consumption
复制标题
纳秒脉冲强化电絮凝处理市政污水，能耗低
DOI：
10.1080/09593330.2019.1694082
复制
发表时间：
2019
影响因子：
2.8
通讯作者：
T.
中科院分区：
文献类型：
--
作者：
Que;N. H.;Kawamura;Y.;Watari;T.;Takimoto;Y.;Yamaguchi;T.;Suematsu;H.;Niihara K.;Wiff. J. P. and Nakayama;T.
本研究比较了纳秒脉冲（NSP）和直流（DC）电源的性能，用于城市污水电凝聚（EC）处理。在EC过程中，四个以单极平行配置（MP-P）连接的Al板用作电极。DC和NSP对COD的最大去除率分别达到68%和80%。此外，NSP处理减少了约15%的比能耗（SEC）相比，DC在类似的COD去除率为68%，这是作为基准值。此外，当使用NSP时，将COD去除率从60%提高到68%所需的SEC比应用DC时少2到3倍。结果表明，在10 kHz频率（f）和1 µs脉冲宽度（pw）下操作的NSP是优选的，以在低SEC下获得更高的COD去除效率。 使用NSP用于EC可以提高COD去除率并降低废水处理SEC。本文提出的结果促进了EC系统与可再生能源相结合的使用，以减少废水处理的净碳足迹。
This study compares the performance of nanosecond pulse (NSP) and direct current (DC) power supplies for use in a municipal wastewater treatment by electrocoagulation (EC). Four Al plates connected in monopolar-parallel configuration (MP-P) were used as electrodes during the EC process. The maximum chemical oxygen demand (COD) removal efficiency reached 68% and 80% using DC and NSP, respectively. Moreover, NSP treatment reduced approximately 15% of the specific energy consumption (SEC) compared with that by DC at a similar COD removal efficiency of ≈ 68%, which was used as a benchmark value. In addition, when using NSP, the SEC required to increase the COD removal efficiency from 60% to 68% was two to three times less than that when DC was applied. The results suggest that an NSP operating at 10 kHz frequency (f) and 1 µs pulse width (pw) are preferred for obtaining higher COD removal efficiencies at a low SEC. The use of an NSP for EC can enhance the COD removal efficiency and reduce the wastewater treatment SEC. The results presented herein promote the use of EC systems combined with renewable energy sources for reducing the net carbon footprint of wastewater processing.