Description
Mechanical breakdown of cocoyam with alkaline limestone to reduce soluble oxalates through chemical neutralization.
Technical
Calcium carbonate from limestone reacts with soluble oxalates (CaC₂O₄ + CaCO₃ → 2CaCO₃ + CO₂) forming insoluble calcium oxalate, while mechanical shear forces rupture cell walls to release bound oxalates. The process increases calcium bioavailability while reducing antinutrient content.
Culinary Significance
Essential for making safe, palatable cocoyam pastes used as thickeners and doughs in traditional dishes, preventing oral irritation and kidney stone risks.
Science
Primary Reaction
Acid-base neutralization
Parameters
Temperature
22°C optimal
18°C to 30°C range
Time
30 minutes
15 minutes – 60 minutes
Equipment
Basalt grinding stone (traditional)Granite mortar and pestleStainless steel grinders (modern)