Assessing Removal Feasibility of high Organic Carbon from Groundwater of Ramjannagar Union at Satkhira District, Bangladesh using Electrocoagulation (EC) Technique

 Background

Ramjannagar is the seaside union of Shyamnagar Upazila in South-western coastal district Satkhira, where groundwater is the main source of consumption and domestic use. However, the deep aquifer contains straw colour water containing excessive organic carbon (>200mg/L) where general groundwater contain <2mg/L. High organic carbon may bind different heavy metals in groundwater which may have harmful health effects on the local community. So, it is important to investigate various water quality parameters and remove the colour or high organic carbon.

There are various treatment methods are now available which are categorised as physical, biological or chemical methods. However, all these methods have some disadvantages, and these drawbacks are sometimes alleviated through electrocoagulation (EC) technique. The author has already investigated the efficiency of this technique for various physicochemical parameters. Electrocoagulation is a low-cost technique which may have the potentiality to remove the colour/ organic carbon.

This study intended to assess the feasibility of Electrocoagulation technique to remove the colour and organic carbon. Different physicochemical parameters of groundwater quality would be investigated under a separate project.

 Objectives

  1. To assess the dissolved organic carbon in groundwater of the study area before and after Electrocoagulation (EC)
  2. To estimate the efficiency of EC to remove the colour and excessive organic carbon from groundwater of the Ramjannagar union of Satkhira district.

 Methods and Techniques

  • Plan of Action:
    1. Intensive literature review
    2. A sampling of groundwater from the study area.
    3. Set up Electrocoagulation (EC) instrument
    4. Water treatment using Electrocoagulation (EC) Technique
    5. Analysing the treatment feasibility

  (2) Methodology:

The following methodological approaches would be adopted to achieve the research proposal objectives:

  1. Investigation of geological and hydrological characteristics, including the position of aquifers and aquitards, the area of recharge, runoff and discharge, as well as streams, rivers, and surface water reservoirs.
  2. A collection of groundwater samples from tube wells for EC analyses.
  3. Dissolved organic carbon determination before and after EC to identify the removal feasibility of the colour and excessive organic carbon from the water using Electrocoagulation (EC) Technique.
  • Instrument required for the Study:
  1. Total Organic Carbon (TOC) analyser and Fluorescence Spectroscopy
  2. Electrocoagulation (EC) setup: Simplified EC technique is shown in Figure 1, where two iron or aluminium electrodes will work as anode and cathode but this proposed research will intend to use both types of electrodes for identifying the suitable one. Finally, treated water will analyse to calculate the removal efficiency of EC technique.

 Expected outcome/ Importance of the Study

Aesthetically, colourless water adds values to the community. Through EC treatment if the dark colour or high organic carbon has been removed, it will help the community aesthetically and reduce the risk of metal pollution from groundwater. So, this project intended to identify a potential technique to remove the main threats colour and organic carbon for future management perspective.