Does swapping cone polishers for a whitener cut a rice mill's carbon?
No. The BEE and SAMEEEKSHA report for the Ganjam rice mill cluster lists the CO2 reduction as nil, because a whitener and a cone polisher use about the same power. The case rests on better rice quality and a higher market price, not energy.
What the report says
- Cluster: about 250 rice mills around Berhampur, Hinjilicut, Bhanjanagar and Ganjam.
- Typical mill: 1 tonne an hour, 28 MWh a year, 14 kWh per tonne.
- Electricity use of the old cone polisher and the new whitener is about the same, so no saving.
- Environmental section: no impact on GHG emissions.
Why do it anyway
Cone polishers are old, give low polish and lower yield, and sell at a lower price. The report found rice from whiteners fetched about Rs 10 to Rs 15 more per quintal. For 14,000 quintals a year that is Rs 1.4 to Rs 2.1 lakh.
What to avoid
Do not describe this upgrade as a carbon saving in a loan or buyer file. List it as a quality and price upgrade, and keep the energy savings claims for projects that cut kWh, such as drives and motors.
Downtime
About one week for dismantling and fitting, in the report's assumption.
Worked CO2 of the mill itself, from the report's numbers
- Electricity: 28 MWh a year, or 14 kWh per tonne.
- At 0.675 kg CO2 per kWh (FY 2025-26): 28,000 x 0.675 = 18,900 kg, or 18.9 t a year.
- Per tonne of production: 14 x 0.675 = 9.45 kg CO2.
- After the swap the report expects about the same figures.
The Rs per quintal gap is the report's 2010 estimate.
What Senseible does here
Senseible reads the mill's electricity bills into kWh and CO2 per month, so energy claims in a loan or buyer file match what the bills show.
Last reviewed 2026-11-03.