Comparison between Nanosecond Pulse and Direct Current Electrocoagulation for Textile Wastewater Treatment

Q3 Environmental Science Journal of Water and Environment Technology Pub Date : 2020-01-01 DOI:10.2965/jwet.19-080

Q. H. Nguyen, T. Watari, Takashi Yamaguchi, Y. Kawamura, H. Suematsu, J. P. Wiff, K. Niihara, T. Nakayama

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引用次数: 1

Abstract

This paper proposes the utilization of a nanosecond pulsed (NSP) power supply in the electrocoagulation (EC) system for textile wastewater treatment. Four aluminum plates arranged in a monopolarparallel configuration are utilized as electrodes in a 200 ml EC reactor. Chemical oxygen demand (COD) and specific energy consumption (SEC) are utilized to characterize the performance of NSPpowered EC. A DC power supply is considered as a benchmark. Field-emission scanning electron microscopy, X-ray diffraction, and energy-dispersive spectroscopy are utilized to characterize flocs. The results reveal that a maximum COD removal efficiency of 77% can be achieved by utilizing NSP power, while a value of only 60% can be achieved by utilizing DC power. Additionally, NSP power consumes at least 24% less energy than DC power at a similar COD removal efficiency. The utilization of NSP power for textile wastewater treatment allows for high COD removal efficiency with a significantly lower SEC compared to traditional DC-powered EC. It is believed that the low SEC exhibited by NSP power could be useful for promoting the utilization of EC for wastewater treatment and could contribute to the reduction of the carbon footprint of this process.

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纳秒脉冲与直流电絮凝处理纺织废水的比较

提出了在电凝(EC)系统中应用纳秒脉冲电源处理纺织废水。在一个200ml EC反应器中，以单极平行排列的四个铝板用作电极。利用化学需氧量(COD)和比能耗(SEC)表征了nspo驱动EC的性能。以直流电源为基准。利用场发射扫描电子显微镜、x射线衍射和能量色散光谱来表征絮凝体。结果表明，采用NSP电源的COD去除率最高可达77%，而采用直流电源的COD去除率仅为60%。此外，在相似的COD去除效率下，NSP电源比直流电源至少消耗24%的能量。利用NSP电源处理纺织废水，与传统的直流供电EC相比，COD去除效率高，SEC显著降低。我们认为，NSP发电所表现出的低SEC有利于促进EC在废水处理中的利用，并有助于减少该过程的碳足迹。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Water and Environment Technology Environmental Science-Water Science and Technology

CiteScore

1.80

自引率

0.00%

发文量

审稿时长

43 weeks

期刊介绍： The Journal of Water and Environment Technology is an Open Access, fully peer-reviewed international journal for all aspects of the science, technology and management of water and the environment. The journal’s articles are clearly placed in a broader context to be relevant and interesting to our global audience of researchers, engineers, water technologists, and policy makers. JWET is the official journal of the Japan Society on Water Environment (JSWE) published in English, and welcomes submissions that take basic, applied or modeling approaches to the interesting issues facing the field. Topics can include, but are not limited to: water environment, soil and groundwater, drinking water, biological treatment, physicochemical treatment, sludge and solid waste, toxicity, public health and risk assessment, test and analytical methods, environmental education and other issues. JWET also welcomes seminal studies that help lay the foundations for future research in the field. JWET is committed to an ethical, fair and rapid peer-review process. It is published six times per year. It has two article types: Original Articles and Review Articles.