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

Commercialization Status/ Techno - Economics:

  • Status of commercialization : This technology has been already commercialized.
  • Licensed to 15 clients (Both in in India and in oversees)
  • Major Raw Materials to be utlilized: Catalyst synthesized from agricultural solid waste
  • Validation level: 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.
  • Techno-Economics :
    • Low foot print requirement
    • Operational cost is much less than with conventional equivalent technology

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.

Commercialization Status/ Techno - Economics:

  • Status of commercialization : This technology is ready for commercialization
  • Major Raw Materials to be utlilized: For reactor construction - RCC/FRP materials required
  • Validation level: Bench scale studies for 4 L (Post tanning wastewater), 12 L (Post tanning wastewater) and 18 L (Sewage) was completed for a continuous run of 7,5 and 9 months respectively.
  • Handholding support: Training, Demonstration, Technology Document, Trouble Shooting, Technology Implementation
  • Techno-Economics :
    • Operational cost is much lesser than the conventional technology as no need of any chemical dosage required

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

Commercialization Status/ Techno - Economics:

  • Status of commercialization : This technology has been already commercialized
  • Licensed to one client
  • Major Raw Materials to be utlilized: Mineral salts that are locally available in the market will be utilized for degradation of hair. Composting materials like dry leaves, soil and saw dust.
  • Validation level: l kg to 500 kg level
  • Handholding support: Training, Demonstration, Technology Document, Trouble Shooting, Technology Implementation

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

Commercialization Status/ Techno - Economics:

  • Status of commercialization : This technology commercialization is under process
  • Major Raw Materials to be utlilized: Fleshing1s, Sludge
  • Validation level: Pilot scale plant is being implemented in Calcutta Leather Complex (CL(), Kolkata - Capacity of pilot plant is 750 kg per day on wet weight basis. The technology has been demonstrated to tanners. The plant is under operation.
  • Handholding support: Training, Demonstration, Technology Document, Trouble Shooting, Technology Implementation
  • Techno-Economics :
    • Elimination of ground water pollution and odor problems associated due to the disposal of solid wastes generated from the tanning industry
    • Biogas generation and use of Digestate as soil conditioner.

For further information

Head, Knowledge Portfolio Management Department (KPMD)
CSIR-Central Leather Research Institute

Adyar, Chennai, Tamil Nadu, India - 600 020

+91 44 24437273 +91 44 24912150

subhendu@clri.res.in & clriinfo@clri.res.in