CSMCRI has standardised some processes to convert hazardous effluents into value-added products (VAP).
Bhavnagar-based Central Salt & Marine Chemical Research Institute (CSMCRI) has standardised few processes to convert hazardous effluents, discharged from dye manufacturing units into the value-added products (VAP) which could have multiple applications.
These VAP find applications in fertiliser, plastic and detergent manufacturing industries. Dye manufacturing units in Gujarat, which is a hub for the said industry, discharge tonnes of liquid waste that is hazardous for the environment. The research by CSMCRI, if implemented by the industry, could significantly reduce pollution due to dye industry.
"We have standardised a few processes to covert effluents discharged by dye manufacturing units like ammonium carbonate, dilute sulphuric acid and ammonium chloride through waste streams," said MR Gandhi, chief scientist - CSMCRI.
"Through these processes, by-products of dye units can successfully be converted into value added products such as Synthetic Hydro Talcite, Zeolite A and Ammonium Sulphate with a zero effluent discharge," he claimed. Out of the hazardous waste, the technology for deriving one of the products from both ammonium carbonate and aluminium chloride waste, Synthetic Hydro Talcite, has been licensed by the institute to Heubach, a leading pigment manufacturer based in Ankleshwar in Bharuch district of the state.
The company, which manufactures paint for Ferrari, is in the process of setting up a plant to manufacture this commercially viable product of international standards. An important additive Synthetic Hydro Talcite finds usage largely in the plastic industry, Gandhi said.
The product is expected to be commercially manufactured by early next year in Gujarat, he added. "The product also finds usage as a fire retardant. It is also used in making antacid drugs as it has the properties to stabilise acidity in human body," said Gandhi. It is proposed by the industry that more such products can be taken up by CSMCRI with the support of international body of dye manufacturers, Ecological and Toxicological Association of Dyes (ETAD), for which discussions are in progress.
State-run fertilisers and industrial products manufacturer Gujarat State Fertilisers and Chemicals (GSFC) has shown interest in the process of converting dye unit effluents into Ammonium Sulphate.
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