Advancements in bioelectrochemical system-based wastewater treatment: A review on nanocatalytic approach

• Published in: Sustainable energy technologies and assessments 2021-12, Vol.48, p.101558, Article 101558
• Main Authors: Sahu, Reecha, Parkhey, Piyush
• Format: Article
• Language: English
• Subjects: Bioelectrochemical systems; Nanocatalysts; Nanoelectrodes; Wastewater treatment
• ISSN: 2213-1388
• DOI: 10.1016/j.seta.2021.101558

Bioelectrochemical systems (BES) utilize the principles of extracellular electron transfer by selective anaerobic microorganisms called as exoelectrogens and represent a multipurpose technology for energy production, product synthesis, product recovery and wastewater treatment. Although endorsed as a realistic alternative towards classical approaches of wastewater treatment, the BES systems, on account of high internal resistance have more or less failed to deliver on the promise. Nanoparticle based electrode development have been extensively studied as a possible measure to overcome this bottleneck and to achieve a practical BES system. Nanoparticles offer a series of advantages towards better electron conductivity, better stability and higher electrocatalytic activity thereby decreasing the charge transfer resistance and improving the energy efficiency of the system. With different strategies of developing nanocatalysts for BES electrodes, the system performance augments significantly. The review presents a synopsis of such approaches for enhancing the capability of anodic and cathodic electrode for removal of organic compounds and other pollutants using the BES systems and the current challenges that still exist to realise a competent real-world solution for wastewater treatment.