B-Heavy vs C-Heavy Molasses

Imagine sugarcane juice moving through a mill's crystallisation process in stages, each stage leaving behind a progressively more exhausted molasses byproduct, and a mill facing a genuine choice at an intermediate stage, B-heavy molasses, still carrying meaningful residual sugar content, versus letting the process run to completion and diverting only the final, C-heavy molasses, the traditional ethanol feedstock left over after essentially all extractable sugar has already been crystallised out.

This distinction matters directly for the sugar-ethanol diversion economics covered elsewhere on this site, diverting B-heavy molasses to ethanol production yields considerably more ethanol per tonne of cane than waiting for C-heavy molasses, because B-heavy still contains sugar that would otherwise have been crystallised into saleable sugar, meaning a mill choosing B-heavy diversion is more explicitly trading away sugar output for higher ethanol volume, a genuinely more aggressive diversion strategy than traditional C-heavy-only ethanol production.

The government's ethanol blending programme, covered in detail elsewhere on this site under fertilisers and chemicals, has specifically incentivised B-heavy diversion through differentiated procurement pricing, offering ethanol producers using B-heavy molasses or direct cane juice a meaningfully higher price per litre than C-heavy-derived ethanol, precisely because B-heavy and direct juice routes deliver more ethanol volume toward India's blending targets per tonne of cane processed.

This pricing differentiation explains a genuine structural shift within the sugar industry's own economics, mills increasingly design their season's production plan around exactly how much cane to route toward B-heavy ethanol diversion versus conventional sugar crystallisation, a real-time trade-off decision that directly shapes both national sugar output, covered under the sugar export policy and minimum selling price discussions elsewhere on this site, and national ethanol supply simultaneously, from the same underlying cane crop.