Biogas Sector and India's Strategic Energy Security Framework

#GS-3 #Economy #Infrastructure #Energy #Environment #Sustainable Development #Biogas #CBG

Why in News

Rising tensions in West Asia threaten India's imports of liquefied petroleum gas.
Around **90%** of India's imported gas passes through the vulnerable **Strait of Hormuz**.
India buys nearly **85%** of its required crude oil from international markets.
These supply risks have forced the government to speed up domestic energy production through biogas.

Biogas is a clean gas made when organic matter breaks down naturally without oxygen.
It consists mainly of methane and carbon dioxide along with small amounts of other gases.
Cleaning and compressing raw biogas creates Compressed Biogas (**CBG**).
Chemically, **CBG** works exactly like standard fossil-derived Compressed Natural Gas (**CNG**).

India depends on foreign countries for **85% of its total** crude oil needs.
Official prices for maize-based fuels grew at a **CAGR of 11.7%** between **FY22** and **FY25**.
This high price growth caused farmers to plant maize over other essential crops.
Under the **GOBARdhan** scheme, the central government gives grants up to **₹50 lakh per district** for community plants.
The government set aside **₹994 crore** to build gas pipelines that connect rural biogas units to the national network.

Bacteria break down wet waste like cow dung, crop leftovers, and sewage in airtight spaces.
Special bacteria convert complex fats and proteins into simple organic acids during the initial stages.
Methane-producing microbes then consume these acids to generate methane gas.
Purification systems strip out carbon dioxide and moisture to boost methane purity above **90%** before compressing it.

Using **CBG** in vehicle transport directly cuts foreign fuel dependency. For example, the **India-Japan Cooperative Biogas for Growth Initiative** powers green buses across multiple states.
Purified methane can run directly through city gas lines for home cooking. For instance, government rules mandate mixing **CBG** into local Piped Natural Gas (**PNG**) networks.
Off-grid biogas plants generate cheap electricity for remote farms. For example, **GOBARdhan** community plants convert cattle dung into power for running local farm tools.
Organic residue left after gas production serves as rich organic fertilizer. Integrated plants supply this natural fertilizer to improve soil health and replace costly chemical inputs.

Collecting seasonal crop waste like paddy straw from scattered small farms remains difficult and expensive.
Artificially high prices for biofuel crops like maize encourage single-crop farming, which reduces pulse production.
Modern purification machines require large upfront investments, making it tough for small businesses to get loans.
Most rural plants sit far from main gas pipelines, making fuel transport by road slow and costly.

India should follow the **Danish Model** by using animal dung and farm waste instead of food crops for energy.
The government should replicate the ethanol program that achieved **20%** petrol blending by late **2025** by offering fixed purchase prices.
Tax benefits like **accelerated depreciation** and income tax exemptions will encourage private companies to invest.
Using the allocated **₹1,558 crore** budget will help buy biomass collection equipment and build grid connection pipelines.

Programs like **GOBARdhan** have laid a strong foundation for green energy development.
Fixing supply chain delays and speeding up **SATAT** project execution will guarantee success.
Focusing on farm waste and giving financial incentives will turn rural waste into clean national energy.