Waste Management Technologies

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.


Immobilized Oxidation Reactors (Ior) For Wastewater treatment

Technology Outline

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.

Salient Features/ Highlights/ Advantages

Low Footprint requirement; No odour emission; Minimum sludge production compared to conventional technology; The technology can be integrated with membrane separation

Business Case and Translation Status

Implemented in many industries in India and Abroad including leather, textile, pharmaceutical, chemical, pesticide manufacturing industries, automobile industry, Sea food Processing industries and Dye intermediate manufacturing industries. It is also implemented for municipal wastewater treatment. The technology is already commercialized.

Sole From Fleshing's Waste

Technology Outline

About 0.5 million tons of fleshing waste is globally generated every year from leather industry. Disposal of this huge quantity of fleshing waste is a major challenge faced by tanners worldwide. A technology has been developed for manufacture of activated carbon from fleshing waste, which can be used for rubber compounding to develop various rubber products like soles, tyres etc. The waste generated by leather industry is utilized by the leather industry itself for manufacture of shoe soles thus internalizing the waste. Also, the usage of carcinogenic carbon black in rubber compounding will be replaced with this product.

Salient Features/ Highlights/ Advantages

a.Tannery

  • Avoid the disposal offleshing waste into landfill
  • Enables wealth from fleshing waste
  • Reduce the environmental pollution load

b.Rubber Industry

  • Avoid the use of carcinogenic filler carbon black
  • No imprint on carpet
  • Good vulcanized rubber

Business Case and Translation Status

The technology is easy to adopt for a tanner with shoe manufacturing unit. The investment cost will relate to only machineries for pyrolysis. The raw material can be sourced from the tanneries. This technology also provides ample scope for new start-ups as the initial investment cost is not high and returns are attractive. The product is ready for commercialization.

Sequential Toxic-Anoxic Bio Reactor (Soabr) Technology For Reduction Of Primary Chemical Sludge In Wastewater treatment

Technology Outline

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

Salient Features/ Highlights/ Advantages

Low foot print requirement, Low electrical energy consumption, Low operation cost, Minimum sludge production compared to primary chemical sludge.

Business Case and Translation Status

The product is already commercialized.

Secure Landfill(Slf)

Technology Outline

For secure storage of chemical sludge generated from Common Effluent Treatment Plants (CETPs) and Effluent Treatment Plants (ETPs). This secure landfill finds enormous potential applications for eco-friendly secured disposal of sludge and solid wastes.

Salient Features/ Highlights/ Advantages

Secure landfill (SLF) for disposal of solid and sludge comprises rigid, monolithic, impermeable, horizontal and vertical liner to prevent leakage of leachate from landfill. Significant amount of solid wastes are generated by several processing industries such as chemicals, leather, textile etc. The structure of the present invention may be used for the secured disposal of these solid wastes. Moreover, the structure may also be used as a secure landfill to dispose the sludge generated from industrial effluent treatment plants. Secure landfill not only enhances the waste holding capacity by 3 times but also improvises the limitations associated in current practice in liner system. Horizontal liner is integrated with plurality of crests and troughs for collection of leachate in vertical direction. Arranging an array of troughs sloping towards sidewall not only enhances the leachate collection rate but also reduces the length of travel of leachate.

Business Case and Translation Status

The product is already commercialized.

Preparation Of Compost From Animal Hair Waste (Process Based Technology)

Technology Outline

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.

Salient Features/Highlights/ Advantages

  • The compost is organic in nature
  • The supplementation of compost enhances the yield of paddy crop
  • Preparation of compost provides technological solution to the disposal of solid waste, hair

Business Case and Translation Status

Process package and Engineering package have been prepared separately and these two will constitute the Technology document The product is already commercialized

Co-Digestion Of Tannery Solid Waste For Biogas Generation

Technology Outline

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.

Salient Features/ Highlights/ Advantages

  • Protection of environment ie air, water and soil from contamination due to dumping of waste
  • Disposal problem of fleshing and WAS in tannery sector can be minimized
  • Odour and groundwater pollution problem can be minimized
  • Biogas generation from tannery solid waste
  • Minimization of carbon release into environment and thereby reduction in carbon foot print
  • No additional treatment cost due to reusing the produced energy from the waste for operation the plant
  • Improves the aesthetic value in and around leather complexes

Business Case and Translation Status

From the inception stage of the implantation of the Pilot Plant at Calcutta Leather Complex (CL(), Kolkata, CLCTA management is aware of the project activities and with their continuous support, the pilot plant has been successfully implemented and commissioned. For continuous operation and maintenance of the Plant, a tripatiteMoU has been signed between CSIR-CLRI, MSME&T, Kolkata and CLCTA, Kolkata. The technology has been aemonstrated to tanners. The plant is under operation.


For further information

Head, Project Planning & Business Development
CSIR-Central Leather Research Institute

Adyar, Chennai, Tamil Nadu, India - 600 020

+91 44 24437191 +91 44 24912150

ppbd@clri.res.in & clriinfo@clri.res.in