Tamil Nadu CM Orders Bio-CNG Plants Across State

CM Pushes for Statewide Bio-CNG Network

Tamil Nadu Chief Minister Vijay has directed officials to establish bio-CNG plants across the state. The directive came during a review meeting on renewable energy and waste management in Chennai on Tuesday.

The plants will convert organic waste — from agricultural residue to municipal solid waste — into compressed biogas. This gas can then be used as fuel for vehicles and industrial applications, reducing dependence on imported fossil fuels.

Focus on Waste-to-Energy Model

Bio-CNG, also known as compressed biogas (CBG), offers a dual benefit: it tackles the growing problem of urban waste while producing clean energy. A senior official from the state's energy department confirmed that the government is now working on identifying suitable locations and private partners.

Under the plan, each plant will process hundreds of tonnes of organic waste daily. The generated gas will be upgraded to bio-CNG, which has a calorific value similar to natural gas.

Timeline and Implementation

The CM has asked for a detailed project report within three months. Officials must also assess the availability of feedstocks — such as sugarcane press mud, paddy straw, and food waste — in each district.

Industry bodies have welcomed the move. They point out that bio-CNG plants can create local jobs and reduce the burden on landfills. However, they have also flagged challenges around consistent feedstock supply and distribution infrastructure.

Reducing Imports, Boosting Green Fuel

Tamil Nadu imports a significant portion of its natural gas needs. By switching to domestically produced bio-CNG, the state aims to save foreign exchange and cut carbon emissions.

The transport department has been asked to prepare a roadmap for blending bio-CNG into the existing fuel supply for public buses and government vehicles. Several cities, including Chennai and Coimbatore, already run a small number of buses on compressed biogas.

Officials have not yet disclosed the total investment required or the number of plants proposed. They said the project will be executed in phases, with the first batch of plants expected to be operational within two years.

What Happens Next

The state government will now invite expression of interest from technology providers and developers. A cabinet note on the bio-CNG policy is expected in the next session of the assembly.