SHILLONG, Nov 06: Three faculty members of the North Eastern Hill University (NEHU) have come up with an energy efficient, economically viable and environmentally friendly technology for treatment and bio-detoxification of azo dye contaminated wastewater effluents from industries.
In a release issued on Tuesday, the inventors - Dr. Mihir. K. Sahoo (Department of Chemistry, NEHU), Prof. R. N. Sharan (Department of Biochemistry, NEHU) and Bhauk Sinha of the Department of Chemistry, NEHU informed that the patented and innovative technology, which, to their knowledge, is the first of its kind, provides a novel, efficient, cost effective, and practical one-step solution to the burning problem of the modern industrialized India and, indeed, the world.
“Our ‘green’ technology provides know-how for an ecologically friendly one-step process of treatment of industrial effluent wastewater comprising azo dyes, which is abundantly produced by many industries, including textile, leather and paint industries among others,” prof. Sharan said.
“In this technology we have successfully identified and overcome the factors responsible for continuing bio-toxicity in the wastewater effluents after treatment with the technology available today. Our novel technology combines the powers of UV radiation and chemical oxidation systems in a unique formulation to exploit optimum and simultaneous outcome of wastewater treatment as well as bio-detoxification,” he said while adding that as a result, the wastewater treated by the novel technology is successful in completely removing the pollutants as well as bio-toxicity of the effluents making it environmentally benign to bio-flora and fauna and fit for release into the environment.
This is also achieved in the most optimal frame of treatment time, thereby, significantly reducing electrical energy consumption.
Spelling out a few of the advantages over the existing technologies, prof Saran said that The time of treatment of the wastewater is reduced to about 25%of the conventional, present day methods for complete removal of an azo dye; The electrical energy consumption is reduced by about 40% over the existing technologies, thereby making it cheaper for industries; The effluent generated after treatment is non-toxic to E. coli (microorganism) and are likely to be equally non-toxic to other bio-flora and fauna; Roughly calculating the case of treatment of 1000 liters of wastewater containing azo dyes, our innovating technology offers the following advantages over the average of existing technologies.