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Electrolysis has been used to improve the nutrient removal in biofilter system. However, the insufficient electron donor formed with the help of electrode limits the process of phosphorus and nitrogen removal. In this study, electrolysis with macrophyte assisted Vermifilter system (E-MAVF) was developed for the treatment of domestic wastewater. To address the issue of insufficient electron, different electrodes used for investigating made of scrap iron, graphite and carbon felt. Vertical E-MAVF systems were constructed using PVC material, featuring Canna indica as the macrophyte and Eisenia fetida earthworms to treat synthetic domestic wastewater at a hydraulic loading rate of 1.44 m3/m2/day. The electrode of scrap iron showed highest removal efficiency of COD of around 91.1% as compared to 82.4% graphite plate and 86.7% carbon felt foam. The improvement in removal of total nitrogen (TN) and total phosphorus (TP) also observed in scrap iron due to the formation Fe3+ and trapping FePO4 respectively. The order of TN and TP removal in different electrode was as Scrap iron > Carbon felt foam > Graphite plate. Thus, this study provides optimal electrode material for treatment of domestic waste in decentralized form.

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Investigation of Electrolysis with Macrophyte Assisted Vermifilter (E-MAVF) for Different Effective Electrodes in Domestic Wastewater Treatment

  • 会议论文

  • 发表日期：

    2025年

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  • Rajat Chandrakant Pundlik,
  • Rajesh Roshan Dash,
  • Puspendu Bhunia

摘要

Electrolysis has been used to improve the nutrient removal in biofilter system. However, the insufficient electron donor formed with the help of electrode limits the process of phosphorus and nitrogen removal. In this study, electrolysis with macrophyte assisted Vermifilter system (E-MAVF) was developed for the treatment of domestic wastewater. To address the issue of insufficient electron, different electrodes used for investigating made of scrap iron, graphite and carbon felt. Vertical E-MAVF systems were constructed using PVC material, featuring Canna indica as the macrophyte and Eisenia fetida earthworms to treat synthetic domestic wastewater at a hydraulic loading rate of 1.44 m3/m2/day. The electrode of scrap iron showed highest removal efficiency of COD of around 91.1% as compared to 82.4% graphite plate and 86.7% carbon felt foam. The improvement in removal of total nitrogen (TN) and total phosphorus (TP) also observed in scrap iron due to the formation Fe3+ and trapping FePO4 respectively. The order of TN and TP removal in different electrode was as Scrap iron > Carbon felt foam > Graphite plate. Thus, this study provides optimal electrode material for treatment of domestic waste in decentralized form.