Featuring the best of green in Chennai

Carbon Loops prevents food waste from reaching landfills in Chennai


Carbon Loops helps the city manage its food waste and provides organic fertilizers derived from such waste to farmers.

Product or concept

Sustainable management of food waste by converting it into compost and biogas.

Problem being solved

  • Preventing food waste from going to landfills that results in methane emissions.
  • Also, weaning farmers away from synthetic fertilizer use by providing them with organic fertilizers.

Process or technology involved

Business Model 1:

  • Biogas plants set up on the premises of establishments such as hotels, manufacturing units and educational institutions.
  • The biodegradable waste from the premises is used to generate compost and biogas.

Business Model 2:

  • The biodegradable waste is collected from clients.
  • The waste is composted at the composting and biogas generating facility of Carbon Loops.

Sustainability benefits

  • Sustainable farming through organic fertilizer use
  • Reduction of greenhouse gas emissions from landfills
  • Providing rural employment

User segments that will benefit

  • Educational Institutions, Offices
  • Hotels/restaurants
  • Small scale Farmers
  • Government Authorities
  • Apartment Complexes/Townships
  • Environmental NGOs

People or organizations involved

  • Company: Carbon Loops
  • People: Kern Agarwal and Ranjani Prabakaran

Innovations or USPs

  • An optimised shredder that reduces particle size to 5mm
  • Hydraulic agitator to reduce solid settlement in digester

Related engineering, science or business topics

  • Waste Management
  • Organic Farming
  • Mechanical Engineering
  • Biotechnology
  • Environmental Engineering
  • Bio-energy

Awards & recognitions

Currently, they have the distinction of being largest recycler after Chennai Corporation.

Other interesting highlights

  • They provide compost to a farmer at a price that is much lower than what organic compost currently costs from other sources.
  • The founders were banking professionals who had no prior experience with waste management or compost production!

Incubated at:

LIBA, Nungambakkam


What is a Biogas Plant? for Home Community and Industry

Biogas fact-finding mission

Take a journey for this topic: Learn more, experience stuff, do something...

Know more about the people behind this

This Chennai startup makes money from food waste : The article focuses on Carbon Loops' journey in establishing a biogas plant related enterprise.

Chennai Duo Stop 5000+ Tonnes of Waste From Reaching Landfills, Help Poor Farmers! : The article sheds light on the different means Carbon Loops went through to establish credibility in setting up biogas plants in the city.

Make a visit to get a first-hand experience

Carbon Loops : For more information regarding the company, you can contact them through their website.

Involve yourself/participate in activities

Purchase the product/solution

Carbon Loops - Products : For more details regarding the product, you can contact them through their website.

Connect with experts

Dr. R Saravanan : He is currently teaching in the Department of Mechanical Engineering at Anna University. He specialises in absorption cooling and heating systems, cogeneration and waste heat recovery, and energy conservation and management.

B-Sustain : B-Sustain has expertise in design, manufacturing and installation of biogas plants starting from small homes to large industries for varying applications.

Experiment through do-it-yourself projects

How to make Free Gas from kitchen waste | Mini bio gas plant | 100% free energy. : The video shows how one can set up a mini-biogas plant using water bottles.

DIY biogas digester : The video describes the different smaller components that go into assembling your own biogas plant at home.

Home made Biogas Plant : The video explains how one can make a biogas plant using the sintex tanks (1000 L capacity).

How To Make Free Gas from Fruit And Vegetables waste | Bio gas plant | : The video shows how one can make a simple biogas plant at their home.

Learn more

Fact Sheet - Biogas: Converting Waste to Energy : The article focuses on the feedstock and the end usage mixture obtained from a biogas plant.

How to make Biogas? : The articles provides details on the process of turning waste into biogas in a biogas facility.

Biogas Plant Development Handbook : The article runs anyone interested in biogas technology through the different aspects of project development involved in constructing such a plant.

What is Biogas? A Beginners Guide : The article answers the basic questions one has to know and to understand more about the uses of a biogas plant.

Advantages and Disadvantages of Biogas : The article specifies the various benefits and drawbacks in setting up a biogas plant.