Building India's agri-residue feedstock supply chain to make CBG blending and SAF mandates commercially deliverable

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Problem Overview: Underutilized biofuel refineries due to fragmented, unstructured feedstock supply

India produces an estimated 230 million tonnes of surplus agricultural residue annually, including rice straw, sugarcane bagasse, and wheat straw [1]. At the same time, India’s CBG and emerging SAF blending mandates are expected to significantly increase demand for biomass-derived fuels over the next decade.

The primary challenge for these fuels is not the feedstock availability; it lies in the supply chain setup and operational issues. While early SAF demand may be met through Used Cooking Oil (HEFA pathway), scaling will increasingly require technologies such as Alcohol-to-Jet (ATJ). Large infrastructure investments, like Indian Oil's upcoming ATJ plant in Panipat could face feedstock reliability and aggregation challenges without robust biomass supply systems. Similarly, operational CBG plants face poor unit economics and low methane yields due to inconsistent feedstock quality, moisture content, and biomass composition. Since transportation and logistics can account for 20-30% of operating expenses, many bio-energy pathways may require decentralized aggregation systems to remain economically viable. The current ecosystem lacks organized aggregation models and affordable technology to ensure a reliable, year-round supply of standardized feedstock.

Core Bottlenecks: Lack of aggregation, preprocessing, & quality-standardization infra

1. Limited Time-Window

Farmers have a 15 to 20 day period [2] to harvest between paddy and wheat sowing. If aggregators cannot quickly mobilize equipment and labor to bale the residue, the farmer burns the field to prepare the soil

2. Logistics Inefficiency

Raw residue has a very low bulk density of 50 to 80 kg/m³ [3]. Transport costs make up 20 to 30% of operating expenses. Moving raw straw more than 50 kilometers reduces the aggregator profit margin, requiring a decentralized depot model.

3. Quality Verification

Biomass is collected without measuring quality on site, such as moisture, ash, and calorific value. Plants get inconsistent batches, leading to 20 to 30% methane yield losses in CBG digesters and rejections at SAF refineries.

Existing Approaches and Technology Readiness

Farm-gate Baling & Densification

Technically mature, but deployment bottlenecked by working capital and lack of depot networks

Multi-feedstock/NIR Quality Sensing

Essential software/hardware for yield optimization

Decentralized Pretreatment -Enzymatic Hydrolysis/thermochemical

Technology validated in pilots outside India, not commercial or available in India

Where is the white-space for innovation?

The mandates are binding, but the supply chain lacks a system that turns field-level burning into fuel ready for refineries. There is a need for a complete procurement model that uses seasonal complementarity, like rice straw in November, sugarcane in January, and wheat in May. This model should provide refineries with a year-round supply contract.

Engineering Innovation

1. Low-cost, durable NIR sensors to measure moisture and calorific value at the collection point

2. Developing decentralized pre-processing facilities to extract lignins and reduce volume for logistical hurdles.

Business Model

A multi-crop, multi-region procurement entity structured around seasonal complementarity

How we identify climate innovation opportunities?

Footnotes
  1. Ministry of Power
  2. A. Dutta et al.: A state of the art review in crop residue burning in India
  3. N. Said et al.: Influence of densification parameters on quality properties of rice straw pellets
  4. Calculated from 1% CBO demand at 15% agri-residue share plus IOCL Panipat 2G ethanol at 50% capacity
  5. Calculated from 5% SAF mandate and 5% CBO at 25% agri-residue share
  6. Calculated from agri-residue diverted at 1.515 t CO2e/t avoided burning (IPCC) + CBG substitution of natural gas at 2.75 kg CO2e/kg (TERI)
 
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Author: Bansal Shah

Last Updated On: June 5, 2026

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