电凝聚(EC)是地下水和废水处理的新兴技术之一,因为它结合了混凝的好处,沉降,浮选,和电化学氧化过程。在过去的十年中,已经进行了广泛的研究工作来实施EC技术,以处理富含化学需氧量(COD)的工业废水,以保护淡水流(例如,河流,湖泊)免受污染。提出了对利用EC处理高COD废水的最新文献的全面回顾。此外,提出了改进EC技术和拓宽其应用范围的建议。本文介绍了工业废水处理中常用的一些技术。然后,将EC工艺与那些处理富含COD的废水的技术进行了比较。EC工艺由于能够处理大量的废水而被不同的研究小组认为是最有特权的技术。之后,彻底审查了EC作为富含COD的废水的单一和联合处理的应用。最后,这篇综述试图强调EC的潜力和局限性。与批量操作模式下的EC工艺相关,最佳操作条件是在10V和60分钟的电压和反应时间,分别。这些最后的值保证了>90%的高COD去除效率。这篇评论还得出结论,EC工艺的相当大的操作成本似乎是严重的缺点,并使其成为处理富含COD的废水的不可行方法。最后,这篇综述试图强调EC的潜力和局限性,并建议在连续流EC系统领域进行大量值得注意的研究对于将该技术作为令人信服的废水技术引入至关重要。
Electrocoagulation (EC) is one of the emerging technologies in groundwater and wastewater treatment as it combines the benefits of coagulation, sedimentation, flotation, and electrochemical oxidation processes. Extensive research efforts implementing EC technology have been executed over the last decade to treat chemical oxygen demand (COD)-rich industrial wastewaters with the aim to protect freshwater streams (e.g., rivers, lakes) from pollution. A comprehensive
review of the available recent literature utilizing EC to treat wastewater with high COD levels is presented. In addition, recommendations are provided for future studies to improve the EC technology and broaden its range of application. This
review paper introduces some technologies which are often adopted for industrial wastewater treatment. Then, the EC process is compared with those techniques as a treatment for COD-rich wastewater. The EC process is considered as the most privileged technology by different research groups owing to its ability to deal with abundant volumes of wastewater. After, the application of EC as a single and combined treatment for COD-rich wastewaters is thoroughly reviewed. Finally, this
review attempts to highlight the potentials and limitations of EC. Related to the EC process in batch operation mode, the best operational conditions are found at 10 V and 60 min of voltage and reaction time, respectively. These last values guarantee high COD removal efficiencies of > 90%. This
review also concludes that considerably large operation costs of the EC process appears to be the serious drawback and renders it as an unfeasible approach for handling of COD rich wastewaters. In the end, this
review has attempted to highlights the potential and limitation of EC and suggests that vast notably research in the field of continuous flow EC system is essential to introduce this technology as a convincing wastewater technology.