Performance assessment of wastewater treatment plants (WWTPs) and application of electrocoagulation process to improve their operation

Sid Ahmed Tertouche, Sohbi Bellebia, Zohra Bengharez*, Zohra Zian, Salah Jellali

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

The present study aimed to assess the efficiency of two wastewater treatment plants (WWTPs) operating with different biological processes and to investigate the electrocoagulation process as alternative to improve their operation. Results revealed the consistent efficiency of urban WWTP that uses activated sludge process, the station operated with removal efficiencies higher than 91% for biological oxygen demand (BOD), chemical oxygen demand (COD) and total suspended solids (TSS) and produced high quality effluent whereas the efficiency of WWTP of an industrial complex using trickling filter process was in the monitored period very small and did not meet the minimum acceptable treatment efficiency of discharged wastewater. The treatment assays with electrocoagulation process using aluminium electrodes exhibited high COD removal particularly for plant of industrial site, the optimal operating conditions for the maximum COD removal are found to be the initial pH of 3, current density of 29.79 mA/cm2, electrolysis time of 5 min and charge loading of 26.11 F/m3. Under these conditions, the removal efficiency of COD is found to be 79%. Consequently, electrocoagulation process can be recommended to improve the performance of WWTPs. Nonetheless, the implementation of EC into industrial or municipal systems should be investigated more.

Original languageEnglish
Pages (from-to)5273-5284
Number of pages12
JournalPolish Journal of Environmental Studies
Volume30
Issue number6
DOIs
Publication statusPublished - 2021

Keywords

  • Biological process
  • Efficiency
  • Electrocoagulation
  • Optimization
  • Wastewater treatment plant

ASJC Scopus subject areas

  • Environmental Chemistry
  • General Environmental Science

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