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Science & Tech.
Pradeep Kumar

13/06/21 10:00 AM IST

New waste water treatment technology

In news

New wastewater treatment technology can reduce costs for low and medium scale enterprises

Technology
  • The technology uses a combination of Electrocoagulation and Electroflotation Enhanced Membrane Module (ECEFMM) techniques for waste water treatment.  
  • Electrocoagulation is a waste water treatment technique that uses electrical charge for changing the particle surface charge, allowing suspended matter to form aggregates, and electroflotation is the separation of suspended particles from water using hydrogen and oxygen bubbles generated by passing electricity through water.
  • In the developed module, electrocoagulation and electrofloatation are adjoined with membrane in a single indigenous setup.
  • The turbulence created because of the hydrogen bubbling through the feed medium or the waste-water resists the deposition of oil over the membrane.
  • The synergistic effect of hydrogen bubbling and rotation of the membrane module creates substantial turbulence within the solution and on membrane surface.
  • On application of electric field during membrane separation, membrane fouling is substantially reduced, and membrane longevity is also enhanced by restricting the membrane ageing for prolonged time period.
  • Thus, it requires less frequent membrane replacement, thereby reducing the maintenance costs to a great extent.
Significance
  • The recovered spent oil after oily wastewater treatment can be further used as an industrial burner oil, furnace oil, mould oil, hydraulic oil and so on.
  • Thus, it creates a huge revenue generation scope for low-income groups by selling this collected spent oil.
  • In a zone of densely concentrated garages, installation of one setup will serve the purpose of wastewater treatment and thereby extend the opportunity towards other low-income group users to control the water pollution level within PCB regulations.
  • It is aligned with the ‘Make in India’ initiative. 
Source: PIB

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