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Improved water management system for toxic textile effluents developed

#GS3 #WATER POLLUTION #SCIENCE AND TECHNOLOGY#WATER MANAGEMENT SYSTEM

CONTEXT

  • Air pollution and Water pollution are one of the rising issues. These are not a new phenomenon like many environmental and anthropogenic changes, which we witness currently due to climate change. These problems started long ago, with the emergence of Industrialization.  
  • Both Air and Water pollution has led to adverse impacts on ecology and environment. It has also led to many health related issues for Humans and other species.
  • Over the years experts are trying to find technologies which can lead to sustainable development. 
  • Recently, Indian researchers have invented an improved water management system that can completely reuse dye wastewater from textile industries, eradicating its toxicity and making it suitable for domestic and industrial usage.
  • Also usually cost it the major hindrance in adopting these kind of technologies, but that is not the case with this technology.
  • This Technology can reduce water treatment costs and facilitate reuse of water in dry regions.
  • This technology is made by researchers of Indian Institute of Technology (IIT) Kanpur along with Malaviya National Institute of Technology, Jaipur, and MBM College, Jodhpur. This new Technology is also known as modified AOP Solution.

Current Water Management Technology- The stand-alone advanced oxidation process (AOP)

  • Currently three-stage treatment process for wastewater technology is being used, which consists of primary, secondary, and tertiary treatment. This technology is unable to to treat toxic industrial wastewater.
  • The stand-alone advanced oxidation process (AOP) treatment technique for colour and odour properties in industrial effluents (dye-based) may be insufficient to meet the set government standards and is also limited due to the high cost of AOPs involving continuous supply of chemical reagents.
  • Also, It cannot remove the synthetic industrial dyes and the effervescent colour and odour, which have a long-lasting carcinogenic and toxic effect on the ecological balance, especially aquatic life. 
  • Due to the above problems, developing a new AOP solution was the need of an hour.

Features of modified AOP SOLUTION

  • This completely modified treatment process comprising of the primary dosing step, followed by the sand filtration step, another AOP and subsequent carbon filtration step.
  • Also this system get rid of the conventional primary, secondary, and tertiary processes, resulting in maximum colour removal, and meets the inland water discharge protocols.
  • The much-improved AOP technology aiming zero discharge water management system is being used for complete reuse of industrial dye wastewater for domestic and industrial usage at a rate of 10 kilo litres/day.
  • The treatment of toxic and highly carcinogenic industrial dyes of textile effluents is performed using this AOP technology for degrading and converting wastewater into organic matter.

Cost Effective Solution

  • It is the correct solution of the existing treatment plant techniques and comprises of a low-cost solution of dye adsorption on acid-modified soil, followed by a photochemical reaction step within a photocatalytic visible light filter and a unique carbon and PAN (polyacrylonitrile) nano-mat fibre filtration process.
  • This new system will reduce the cost upto 50%. With more efficiency and less cost this technology will be a boom for some of the water scarce regions like Rajasthan.
  • The Ministry of Science and Technology is also planning to scale up this plant to 100 kilolitres/day capacity to meet the current industrial requirement. 

Source: The Hindu.

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