Environment -Friendly Processes: Electrocoagulation and Activated Carbon Filtration for Reuse of Textile Wastewater

Document Type : Review Articles

Authors

1 chemistry, faculty of education, ain shams university, Cairo, Egypt

2 October High Institute for Engineering & Technology, Giza, Egypt

Abstract

Electrocoagulation is a simple method used for removing contaminants and recycling wastewater by using aluminum, stainless steel and iron electrodes. Textile wastewater was collected from the textile processing industry. This promising treatment consists of two steps, electrocoagulation as a first step completed with Activated carbon filtration as a second step reported in this work. The contaminants of the solution combined in the situ forming metal hydroxide flocs, which filtered as a precipitate or skimmed as a float. To revenue the best advantage of this system, the two processes should run in a rational sequence. Several important parameters, such as applied potential, Electrode material and conductivity were studied to achieve higher removal efficiency. Scanning electron microscope (SEM) analysis, Atomic force microscopy (AFM) and the electrical connection of electrodes were investigated. The results showed clearly that the stainless steel electrode can enhance effectively color removal by 98.8 %, reduced COD to 256 mg /L, while Activated carbon filtration can almost remove the total dissolved solids (TDS) and, turbidity. The findings showed that in textile wastewater at pH=10.5 the stainless steel is superior to iron and aluminum as a sacrificial electrode material and Mono-polar Connection in Parallel is the best connection as it decreases the potential difference, and energy Consumption was 2.5 kWh/m3.

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History

  • Receive Date: 15 February 2021
  • Revise Date: 08 March 2021
  • Accept Date: 04 April 2021

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