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Related Concept Videos

Coagulation01:06

Coagulation

Colloidal solids are solid particles suspended in solution. They are usually negatively charged, attracting a compact primary layer of positively charged ions, which attract more counterions to form an electrical double layer. Electrostatic repulsion between the charged double layers prevents the particles from colliding, stabilizing the colloids. These solids are often undesirable because they can contain toxins that are difficult to remove. Coagulation is a technique that helps aggregate and...
Biological Treatment of Effluent and Waste Water01:30

Biological Treatment of Effluent and Waste Water

Biological wastewater treatment relies on the metabolic activity of microorganisms to remove pollutants from sewage. In modern treatment systems, this process is organized into sequential stages that progressively reduce solid material, dissolved organic matter, and microbial contamination. Each stage plays a distinct role in improving water quality and preparing the effluent for safe discharge or reuse.Primary and Secondary TreatmentPrimary treatment is a physical process that removes large...
Microbial Wastewater Treatment01:30

Microbial Wastewater Treatment

Microbial communities in aquatic ecosystems play a key role in the natural breakdown of contaminants introduced through domestic and industrial effluents. Acting as biological catalysts, these microbes change and mineralize a wide range of organic and inorganic pollutants under different redox conditions.In oxygen-rich surface waters, aerobic heterotrophs lead organic matter breakdown, using oxygen as the terminal electron acceptor to efficiently oxidize substrates to carbon dioxide and water.

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Related Experiment Video

Updated: Jun 25, 2026

Procedure to Evaluate the Efficiency of Flocculants for the Removal of Dispersed Particles from Plant Extracts
10:37

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Published on: April 9, 2016

Statistical Optimization of Vegetable Washwater Treatment Using Electrocoagulation.

Ablema Sephora Tanoe1, Patrick Drogui2, Mahdieh Khajvand1

  • 1Institut National de la Recherche Scientifique (INRS-ETE), Université du Québec, Québec, Quebec, Canada.

Water Environment Research : a Research Publication of the Water Environment Federation
|June 24, 2026
PubMed
Summary

Electrocoagulation (EC) effectively treats vegetable washwater (VWW), significantly reducing pollutants like total suspended solids and phosphorus. This cost-effective method offers a viable solution for managing agricultural wastewater.

Keywords:
TSS removalelectrocoagulationneonicotinoidsresponse surface methodologyvegetable washwater

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Area of Science:

  • Environmental Engineering
  • Water Treatment Technologies
  • Agricultural Wastewater Management

Background:

  • Vegetable washwater (VWW) presents significant disposal challenges due to high pollutant loads.
  • Existing treatment methods may be energy-intensive or inefficient for complex VWW matrices.
  • Developing sustainable and cost-effective VWW treatment is crucial for the agricultural sector.

Purpose of the Study:

  • To investigate and optimize the electrocoagulation (EC) process for treating VWW from root vegetable washing.
  • To determine the most efficient operating conditions for pollutant removal and energy minimization.
  • To assess the efficacy of EC in reducing specific contaminants like total suspended solids (TSS), turbidity, phosphorus, neonicotinoid insecticides, and color.

Main Methods:

  • Preliminary electrocoagulation (EC) experiments were conducted to establish operational parameter ranges.
  • Response surface methodology (RSM) was employed for statistical optimization of the EC process.
  • VWW samples from potato, leek, and red beet washings were treated using a 500-mL reactor with aluminum electrodes.

Main Results:

  • Optimal EC conditions (0.32 A for 8.8 min) achieved 99% TSS and 98% turbidity reduction, and 93% total phosphorus reduction for Farm 1 VWW.
  • EC treatment generally met the regulatory discharge limit for TSS (50 mg/L), with Farm 4 being an exception.
  • Significant reduction in neonicotinoid insecticides (38%) and true color (from 283 to 60 UCV) was observed.
  • Energy costs for VWW clarification ranged from CAD$0.06/m³ to CAD$0.09/m³.

Conclusions:

  • Electrocoagulation is a highly effective technology for treating vegetable washwater, achieving substantial reductions in key pollutants.
  • Optimized EC parameters provide a cost-effective and energy-efficient solution for VWW management, meeting most regulatory discharge standards.
  • EC demonstrates potential for removing emerging contaminants like neonicotinoids and improving the aesthetic quality of VWW.