Mango drying systems in Guinea
What the crop demands, what the country imposes, and what that means for capacity.
Guinea grows a great deal of mango and processes almost none of it. The reason is the same one that governs everything else in the country: the harvest runs into the rains, and Conakry receives over three metres of rain a year. Sun-drying is not merely inefficient here, it is impossible for much of the season.
The situation in Guinea
The wettest country in West Africa, and that governs everything. Conakry receives over three metres of rain a year, much of it in four months, and sun-drying during that window is not difficult so much as impossible. Guinea therefore has the region’s strongest case for controlled drying and the least of it installed — the crops are there, the harvest coincides with the rains, and there is no fallback.
Growing regions. Guinée Forestière in the south-east, Basse-Guinée around Conakry, Fouta Djallon in the middle
What mango drying demands
Mango is the crop that makes the case for controlled drying on its own. It arrives in a six-week wall of fruit, prices collapse exactly when volume peaks, and a large share of the crop is never picked up at all. Dried at 65–70 °C to 12–14 % moisture it becomes a twelve-month product with an export market that already exists.
Harvest calendar
April to July, running directly into the onset of the rains. By June the wet season is established across most of the producing zones.
The working campaign window as the trade runs it. It shifts a fortnight either way with the rains.
Process parameters
| Parameter | Value |
|---|---|
| Drying temperature | 65–70 °C |
| Final moisture | 12–14 % |
| Yield (fresh : dried) | 10 : 1 |
| Cycle time | 16–20 h |
Sizing starting points from ordinary processing practice, not a validated recipe for your product. Confirm against your own intake and your buyer’s specification.
Worked sizing example
For a unit taking 4 tonnes of fresh product a day, at a yield of 10 : 1:
Illustrative figures calculated from the yield and campaign window above. They size a conversation; they do not describe any existing installation.
Fuel available in Guinea
Forest Guinea: oil palm and coffee. Rice husk is the country’s most widespread residue, and also its ashiest.
- Base load. Palm kernel shell · Rice husk · Palm fibre (mesocarp)
- Supplement. Coffee husk and parchment · Cashew shell · Sawdust
See all 27 fuels and their properties
Market and buyer requirements
Domestic and regional, with an export opportunity that is currently unrealised because there is almost no processing capacity to build it on.
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The systems that hold this profile
Other crops in Guinea
Palm kernel · Coffee · Fonio · Fish
Mango drying elsewhere
🇧🇫 Burkina Faso · 🇨🇮 Côte d'Ivoire · 🇲🇱 Mali · 🇬🇭 Ghana · 🇸🇳 Senegal
Frequently asked questions
Why has Guinea not developed dried mango?
Because the April-to-July harvest runs directly into the rains, and Conakry receives over three metres of rain a year. Sun-drying is not inefficient here so much as impossible for much of the season, and there has been no alternative — which is exactly the gap a 65–70 °C chamber fills.
Does high humidity make chamber drying harder?
It makes it work harder: incoming air already carries moisture, so more energy goes into each of the roughly 9 kg of water removed per kilogram of dried mango. But the trade is a longer cycle against no product at all, which is easier than it sounds.
What fuel is available in Guinea?
Palm kernel shell is the best option at 4,200–4,800 kcal/kg and 550–650 kg/m³, abundant in Basse-Guinée and Guinée Forestière. Rice husk is the most widespread residue in the country but runs 15–22 % ash, so it belongs in a blend rather than alone.
Size a unit in Guinea
Tell us your daily fresh volume and target output, and we will size the chambers, the burner and the fuel available around your site.
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