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Indian researchers develop wastewater treatment solution

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New Delhi, Sep 10: Indian researchers have developed an “improved” wastewater treatment solution that can completely reuse dye wastewater from textile industry, eliminating its toxicity and making it suitable for domestic and industrial usage.

It reduces the water treatment costs and facilitate the reuse of the water in dry regions.

The current three-stage treatment process for wastewater consisting of primary, secondary, and tertiary treatment is unable 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 set government standards and is also limited due to the high cost of AOPs involving continuous supply of chemical reagents.

“This is because 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 and especially aquatic life. In order to remove this toxicity, an upgraded solution with the AOP technology is the need of the day, a release from the Department of Science & Technology (DST) said.

Working towards this, researchers from the Indian Institute of Technology, Kanpur, with Malaviya National Institute of Technology, Jaipur, and MBM College, Jodhpur, have developed a modified AOP solution.

The completely modified treatment process consists of the primary dosing step followed by the sand filtration step, another AOP and subsequent carbon filtration step.

It eliminates the need for the conventional primary, secondary, and tertiary processes resulting in maximum colour removal and meets the inland water discharge standards.

Department of Science and Technology (DST), Water Technology Initiative (WTI), along with the Indian National Academy of Engineering (INAE) supported the development of this technology at a pilot level in collaboration with Laxmi Textile Prints, Jaipur for the commissioning of this pilot-scale plant at Textile Industrial Park, Jaipur.

The “much-improved” AOP technology targeting zero discharge water management system is being utilized for the 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 mineralizing recalcitrant organic matter from effluent wastewater.

It is a direct replacement of the existing treatment plant processes and consists 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 nano-mat fibre filtration process. Having been set up on a pilot basis, it remediates industrial wastewater.

The technology has resulted in the recuperation of 50 per cent of the treatment cost incurred from conventional processes for water treatment (especially due to the high cost of sludge disposability) in the water-scarce regions of Rajasthan.

Further, scaling up of this plant to 100 kilo litres/day capacity to meet the current industrial requirement is underway with automated plant operations, said a release.

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Maharashtra government tells HC, Param Bir Singh non-traceable

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Call me “Dada”, not “Sir”, Tripura CM Biplab Kumar Deb to employees

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Agartala: In what appears to be a step to boost the morale of the government employees, Chief Minister Biplab Kumar Deb on Sunday asked the government employees to call him “Dada” instead of “Sir”. “Call me Dada, not sir. It enhances the warmth of the relationship”, Deb told a gathering of government employees.

Deb exhorted the government employees of the state especially ASHA and Anganwadi workers of the state asking them not to dishearten as the state government was eager to improve their pay structure.

“I salute the ASHA and Anganwadi workers of my state. The level of dedication that my sisters have shown during the pandemic period deserved applause. I know, they want to hear good news from me and I am assuring you all that this government will not disappoint anyone”, Chief Minister Biplab Kumar Deb told a gathering of government employees at Badharghat sports school field organized by Vivekananda Vicha Manch (VVM).

VVM has emerged as a big platform of government employees, of late, and Sunday’s public rally was its first big gathering to thank the Chief Minister for the series of steps his government took for the welfare of the employees.

“I know what challenges you people are facing. Nothing is hidden in front of me. I am assuring you all everything will be taken care of in the due course of time”, he added.  Lauding the efforts of government employees Deb said, without them no government office can function.

“Due to the efforts of government employees, people can access the benefits of the state sponsored welfare schemes. But, for a prolonged period the employees did not get their right to do something freely. They were trapped in the clutches of unions. In the previous regime, Left sponsored unions used to enjoy supreme power which had reduced the whole work culture of the state to tatters. In 2018, you people showed courage and voted BJP to power”, said Deb.

“Despite fund constraints, the state government is positively working on the issues of DA and other factors pertaining to the interest of the government employees. Our government has already addressed a number of issues related to financial benefits. The ad-hoc promotion, increment for Group D, Group C employees, regularization of SSA teachers, seventh pay scale, UGC scale for professors, special benefit for LTC are to name a few. All these indicate what we want to do and we shall do what we promise”, the Chief Minister said.

The Chief Minister also asked the officials not to call him “sir” suggesting them to refer to him as “Dada” as it makes the relationship stronger and cherished. The Chief Minister also distributed clothes among children of Badharghat sports school during the programme. State BJP President Manik Saha, Minister Ram Prasad Paul, Minister Sushanta Chowdhury, MLA Mimi Majumder, state BJP Vice President and president of Vivekananda Vichar Manch Rajib Bhattacharjee also spoke on the occasion.

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