Ethanol vs Biodiesel vs Compressed Biogas (CBG): Comparing Biofuel Options

India's transition to cleaner fuels is moving along several paths at once. Ethanol, biodiesel, and Compressed Biogas (CBG) are three of the country's key biofuel options, but they serve different parts of the energy market.

Ethanol is primarily used to replace petrol, biodiesel is blended with diesel, and CBG is positioned as a renewable alternative to CNG and natural gas.

Their feedstocks, technologies, supply chains, government policies, and commercial challenges are also very different.

As India's biofuel industry enters a new phase, understanding these differences is important for producers, investors, farmers, and businesses looking at opportunities in renewable energy.

India's Three Major Biofuel Opportunities

The simplest way to distinguish the three fuels is by what they replace:

• Ethanol → Petrol
• Biodiesel → Diesel
• CBG → CNG / Natural Gas

This also determines how each market develops.

Ethanol benefits from established agricultural and fuel-distribution networks. Biodiesel depends heavily on collecting waste oils and fats from fragmented sources. CBG requires the aggregation of agricultural and organic waste and access to gas distribution infrastructure.

As a result, the three markets are currently at very different stages of maturity.

Ethanol: India's Most Mature Biofuel Market

Ethanol is currently India's most successful large-scale biofuel programme.

It is produced from feedstocks such as sugarcane, molasses, and sugarcane juice, maize, broken rice, and other grains. It is blended with petrol under the Ethanol Blended Petrol (EBP) Programme.

Where Does Ethanol Stand in 2026?

India has reached the 20% ethanol-blending milestone, advancing the target that was originally set for 2030. Government data shows ethanol blending increased significantly over the past several years, reaching almost 18% during ESY 2024-25.

The next stage, however, is less certain. As of July 2026, the government has said that no decision has been taken to increase the nationwide base blending level beyond E20. Higher blends could be considered after further technical studies and stakeholder consultations.

Why Ethanol Scaled Quickly

Several factors supported rapid industry growth:

• Clear blending targets
• Procurement by oil marketing companies
• Administered ethanol prices
• Expansion of distillery capacity
• Wider feedstock options
• Government support for ethanol production

This gave producers greater demand visibility and encouraged significant investment in production capacity.

The Next Challenge

Ethanol's success has created a new question: what happens to capacity if domestic demand does not grow beyond E20 quickly?

Producers now need to consider capacity utilisation, feedstock costs, higher-value applications, flex-fuel vehicles, 2G ethanol, and potential future increases in blending.

The industry has therefore moved from a pure capacity-expansion phase toward a more complex phase focused on efficiency and market development.

Biodiesel: A Market With Significant Room to Grow

Biodiesel is intended to play a role similar to ethanol, but in the diesel market. India's National Policy on Biofuels has an indicative target of 5% biodiesel blending in diesel by 2030.

Biodiesel can be produced from:

• Used Cooking Oil (UCO)
• Animal fats and tallow
• Non-edible oils
• Acid oils
• Other waste-based lipid feedstocks

As of 2026, the actual blend rate is still below 1%. Production has grown, expected to rise to roughly 640 million litres in 2026, but that's a small fraction of what a genuine 5% blend would require nationally.

|| Related Read: Ethanol-Diesel Blending

Why Has Biodiesel Lagged?

The biggest challenge is feedstock collection.

Unlike sugarcane or maize, which can move through established agricultural supply chains, used cooking oil is generated in relatively small quantities across thousands of restaurants, hotels, food processors, commercial kitchens, and other establishments.

Collecting, transporting, aggregating, and processing this material economically requires a well-developed supply chain.

The government's Repurpose Used Cooking Oil (RUCO) initiative has sought to create a formal ecosystem for collecting UCO and converting it into biodiesel and other products. However, fragmented collection remains a major industry challenge.

Biodiesel's Emerging Opportunity

The opportunity extends beyond road transportation.

Used cooking oil is also an important potential feedstock for Sustainable Aviation Fuel (SAF). As global demand for lower-carbon aviation fuels grows, biodiesel and SAF producers could increasingly compete for the same waste-based feedstocks.

That makes India's UCO collection infrastructure strategically important for more than one renewable-fuel market.

CBG: India's Emerging Waste-to-Energy Opportunity

Compressed Biogas (CBG) represents a different approach to biofuel production. CBG is purified biogas that can be used as a renewable alternative to CNG and, in suitable applications, natural gas.

It can be produced from a wide range of organic materials, including:

• Cattle dung
• Crop residues
• Press mud
• Food waste
• Municipal organic waste
• Other biodegradable biomass

This gives CBG an important connection to both renewable energy and waste management and comes with its own set of trade-offs worth understanding.

From SATAT to GOBARdhan

The SATAT initiative, launched in 2018, was designed to encourage CBG production from waste and biomass and create an ecosystem around its purchase and distribution.

The policy environment has now evolved further through the GOBARdhan framework.

CBG blending obligations for CNG (Transport) and PNG (Domestic) segments under city gas distribution networks are scheduled to increase from 3% in FY2026-27 to 4% in FY2027-28 and 5% from FY2028-29 onwards.

This is important because it creates a stronger demand signal for CBG producers.

The framework also includes support mechanisms such as capital assistance, feedstock aggregation support, and measures intended to improve project viability. Eligible greenfield projects can receive capital assistance of up to ₹2 crore per tonne per day (TPD) of installed CBG capacity.

CBG's Major Advantage: Multiple Products

A CBG plant does not produce only gas.

The anaerobic digestion process also produces digestate that can be processed into Fermented Organic Manure (FOM) and other organic soil amendments, a co-product model not unlike how ethanol distilleries monetise DDGS as a by-product.

This creates the possibility of multiple revenue streams:

Organic waste → CBG + Organic Manure

For India, where agricultural waste and organic waste are available in large quantities, this circular-economy model could become increasingly important.

Ethanol vs Biodiesel vs CBG: Side-by-Side Comparison

Factor	Ethanol	Biodiesel	Compressed Biogas (CBG)
Replaces	Petrol	Diesel	CNG / Natural Gas
Major feedstocks	Sugarcane, maize, broken rice, other grains	Used cooking oil, animal fats, non-edible oils	Cattle dung, crop residues, press mud, organic waste
Market maturity	Mature	Developing	Emerging
Key policy	Ethanol Blended Petrol (EBP) Programme	National Policy on Biofuels / RUCO	SATAT / GOBARdhan
Blending target/status	E20	5% indicative target by 2030	5% CBG obligation from FY2028-29
Major challenge	Demand and capacity utilisation beyond E20	Feedstock collection and cost	Feedstock aggregation and project economics
Key by-products	DDGS and other co-products	Glycerol	FOM / organic manure
Main opportunity	2G ethanol, flex-fuel and higher blends	UCO and SAF	Waste-to-energy and circular agriculture

What Does This Mean for India's Biofuel Industry?

The three markets highlight an important lesson: biofuel growth depends on more than production technology.

Feedstock availability, logistics, government policy, infrastructure, and reliable offtake all have to develop together.

Ethanol: The Proven Model

Ethanol demonstrates how strong policy support and assured demand can rapidly scale a biofuel industry.

Its next challenge is determining how the market develops after E20 and how producers manage capacity and feedstock economics.

Biodiesel: The Supply-Chain Challenge

Biodiesel has significant potential, but its growth depends heavily on developing efficient UCO and waste-feedstock collection networks.

The opportunity could become even more valuable as biodiesel competes with or complements emerging SAF markets.

CBG: The Emerging Growth Story

CBG has gained stronger policy momentum through mandatory blending obligations and new project-support mechanisms.

Its success will depend on whether developers can solve the practical challenges of feedstock aggregation, plant utilisation, financing, transportation, and gas offtake.

The Future of India's Biofuel Mix

India's biofuel transition is unlikely to be dominated by a single technology.

Instead, different biofuels will serve different parts of the energy system.

• Sugarcane and grain → Ethanol → Petrol
• Used cooking oil and waste fats → Biodiesel / SAF → Transport and Aviation
• Agricultural and organic waste → CBG + Organic Manure → Gas and Agriculture

This diversity is one of India's biggest advantages. Agricultural residues, food waste, animal waste, and other organic resources can be converted into energy while also creating additional economic value.

For producers and investors, the opportunity lies in identifying the right feedstock, technology, location, and end market rather than treating all biofuels as the same industry.

Ethanol, Biodiesel or CBG: What Comes Next?

Ethanol, biodiesel, and CBG represent three different stages of India's biofuel journey.

Ethanol is the most mature market and has demonstrated the impact of blending mandates and assured procurement. Biodiesel remains a significant opportunity, but its growth is constrained by feedstock collection and economics. CBG is emerging as a promising waste-to-energy market, supported by stronger policy measures and mandatory blending requirements.

The next phase of India's biofuel transition will depend on how effectively the industry connects feedstock, technology, infrastructure, policy, and demand.

For companies operating across the biofuel value chain, this creates opportunities not only in fuel production but also in waste aggregation, feedstock processing, logistics, by-products, and circular-economy solutions.

At Edhas Biofuel, we continue to explore the technologies, feedstocks, and market developments shaping India's renewable-fuel industry.