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CLRI has over the years built up a strong base of a wide range of technologies. Conscious efforts are made by this Institute to secure appropriate Intellectual Property (IP) Rights like PATENT (in India and abroad) and COPYRIGHT in respect of the new developments.
The technology comprises of four components each of which either comprised of immobilized bacteria in nano porous carbon/ iron doped nanoporous carbon/ enzyme immobilized nanoporous carbon. The components also generate hydroxyl radical for the oxidation of organics in wastewater. The nano porous activated carbon generate hydroxyl radicals from molecular oxygen by the carbon matrix at the outer pore surface area. The organics in wastewater are fragmented by immobilized martrices. The fragmented organics are oxidized by the hydroxyl radicals generated at the outerpore surface area ofthe nano porous activated carbon matrix.
Low Footprint requirement; No odour emission; Minimum sludge production compared to conventional technology; The technology can be integrated with membrane separation
The reactor can able to simultaneously remove colloidal and suspended particles with very minimum sludge production. The reactor comprises of oxic and anoxic zones. The oxic zone removes the suspended particles by interception method and anoxic zone digest the solids scavenged by the oxiczone
Low foot print requirement, Low electrical energy consumption, Low operation cost, Minimum sludge production compared to primary chemical sludge.
About 50-70 kg of hair is produced from one ton of raw hides during pretanning operations. A process has been developed for preparation of compost using the solid waste, hair. A suitable bacterial species has been identified for the degradation of hair waste followed by manufacturing of compost using keratin hydrolysate (product of hair degradation). The whole process could be completed within a time span of 9-10 days. The process provides technological solutions to address the issue of solid waste on one hand and provide scope for financial returns on the other.
Today tanneries in India face the twin problem of managing process solid waste i.e fleshing, a process solid waste and effluent treatment plant sludge. Fleshing pose serious environmental threat and reuse potential is scarce. Likewise, the treatment of effluent treatment plant's waste activated sludge (WAS) in a sludge digester demands huge investment cost. Keeping these two specific needs, technology has been developed for co-digestion of these two substrates i.e fleshing a process solid waste in combination with waste activated sludge (WAS) for biogas generation. A pilot scale demonstration plant of capacity 750 kg/day on wet weight basis has been implemented at Calcutta Leather Complex (CLC), Kolkata.
Adyar, Chennai, Tamil Nadu, India - 600 020
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subhendu@clri.res.in & clriinfo@clri.res.in