Uganda uses two coffee processing methods, and the difference between them is what happens to the fresh cherry in the first hours after picking. Dry processing sends the whole cherry straight to a drying surface and produces kiboko. Wet processing pulps the cherry, removes the sticky mucilage by fermentation or machine, and produces parchment. Both end at the same place: clean coffee off a huller.
Which Coffee Processing Route Is Open to a Ugandan Farm
The choice is made by water, volume and altitude rather than by preference, and Uganda's own production pattern shows it. The ministry's coffee department puts the dry processed Robustas grown around the Lake Victoria basin at about 85 percent of Uganda's total annual production, and locates wet processing with the choice Arabicas above 1,500 metres in the Mount Elgon area, the highlands of Nebbi and the mountains of Kisoro and Rukungiri. Most Ugandan coffee is dry processed because most Ugandan coffee is lowland Robusta grown by households with no pulper and no washing channel.
Dry Processing Coffee Into Kiboko on the Farm
Dry processing is the simpler method and it is the one most Ugandan smallholders use. The cherry is dried whole, seeds still inside the fruit, mostly in the sun, and what comes out is known locally as kiboko. Arabica dried this way is called Drugar, short for dry Ugandan Arabica, and it is the route used in Kasese and parts of the south west while the rest of Uganda's Arabica is washed.
Three numbers govern the method. Drying begins immediately after harvest, because delay develops taints and moulds. The lot is finished when the dried cherries reach 13 to 14 percent moisture. And the coffee must not be rewetted at any point during the drying regime, which in practice means covering at night and before rain. Frequent stirring gives an even dry.
Where dry processing loses quality is in what goes onto the surface in the first place. The harvest often arrives with unripe and immature cherries, dried cherries, twigs and leaves mixed in, and on the department's own account it is usually not sorted before drying begins. Once the whole heap is dry it is all black and nothing can be separated by eye, which is why careful picking matters more on this route than on any other. The drying operation itself is covered in the coffee drying guide.
Wet Processing Coffee Into Parchment After Harvest
Wet processing is a sequence of machine and water operations, and each one has a failure mode attached. Understood as a chain, it runs: sort by flotation, pulp, remove the mucilage, wash, then dry.
Flotation comes first and costs nothing. Unripe cherries, over dried ones, twigs and leaves are lighter than ripe fruit, so they float off in a simple vat of water or in a mechanical washer separator that cleans the ripe cherry at the same time. This is the sorting step that dry processing does not get.
Pulping squeezes the wet bean out of the cherry and leaves the pulp behind. A hand pulper handles about 300 kg of fresh cherry an hour, and the same unit fitted with an electric motor or a small engine goes faster. Central pulping stations run units of up to 4 tonnes an hour. That spread is the reason pulping tends to be a group or station operation rather than a household one.
Full Wash and Semi Wash Processing in Uganda
After pulping, the bean still carries a sticky sugar coating called mucilage, and how it comes off is the whole difference between the two wet routes.
| Step | Full wash | Semi wash |
|---|---|---|
| Mucilage removal | Fermentation, 1 to 2 days | Machine, immediately |
| Washing | Thorough, in channel or vat | Combined with removal |
| Water per kg cherry | 2 to 10 litres | About 0.5 litres |
| Main risk | Over fermentation | Machine setting |
In the full wash route the mucilage is broken down by enzyme activity under controlled fermentation over one to two days, then the parchment is washed thoroughly until no trace of fermented mucilage remains. Washing is done in a channel or a vat, and because parchment is slightly denser than water the beans sink, so they have to be stirred continuously with rotary rods or by hand with spades. Coffee produced this way can be very good, and it is demanding: it needs plenty of clean water and close management of both the fermentation and the washing.
In the semi wash route the mucilage is taken off mechanically straight after pulping, with degradation and washing happening in one operation, so there is no fermentation at all. The handbooks describe pulper and mucilage remover units as a cost efficient way to produce good coffee consistently, with no fermentation tanks or washing systems to build, less water, and less risk of over fermentation. There is capital to find up front, and for semi washed processing those units are what the handbooks recommend.
Either way, the wet parchment comes off the machine at 50 to 60 percent moisture and is dried on suitable raised surfaces until the bean inside reaches 12 to 13 percent. Good storage of dry parchment in clean sisal or jute bags on pallets is part of the method rather than an afterthought.
Where Coffee Processing Spoils the Cup and Costs the Farmer
The Arabica handbook carries a defect table that maps each processing step to what it does to the coffee when it goes wrong, and it is the most useful thing in the document for anyone choosing a route. Read it as a list of the risks you are taking on.
Two things about that list are worth noticing. Half of it happens after the water work is finished, which means a wet mill cannot save a badly dried lot. And nothing on it is reversible. Processing defects are not discounted back to a lower grade and then forgotten, they are the reason a consignment is refused.
Hulling Kiboko or Parchment Into Clean Coffee for Market
Hulling is the mechanical operation that takes the covering off: the husk in the case of kiboko, the parchment and film in the case of wet processed coffee. What comes off the huller in both cases is called FAQ, for fair average quality, and that is the product Ugandan exporters buy.
Huller speed is worth asking about, since it is one of the few machine settings a farmer can sensibly query. Hullers usually turn at 450 to 800 revolutions a minute, and higher speeds give a more polished appearance while also increasing breakages. A polished lot with more broken beans is not obviously a better lot, so the operator's speed choice is a real decision rather than a detail.
Out turn is the number that tells you what the hulling produced. Weigh a kilogramme of kiboko or parchment, hull it, winnow off the husk and weigh what remains: the handbook's worked example recovers 540 g from a kilogramme, being 54 percent. Fifty percent is the minimum for saleable kiboko and 50 to 60 percent is normal. The same figure is used as a yield conversion on the coffee yield per acre page and as a drying check on the post harvest handling page.
Sorting and Grading Clean Coffee for Buyers
FAQ is sorted by size over perforated sieves, and by weight either on a gravity table or pneumatically in a catador, which separates by how the bean behaves in moving air. Machines sort by colour, size, density and aerodynamic shape, and the handbooks are clear that hand sorting is still needed at the end for coffee going to export.
Grading proper assesses four things on a sample: bean size, moisture content, the quantity of defects and foreign matter. Size is read with screen trays numbered 10 to 20, where the number corresponds to a hole diameter in millimetres, so screen 14 is 5.60 mm, screen 16 is 6.30 mm and screen 18 is 7.10 mm. Larger screens command better prices, and roasters want uniform size because small light beans over roast when they are mixed with large heavy ones.
Then the safeguard that catches most lots: moisture must sit within the agreed standards and the coffee law at 13 to 14 percent at primary level and 11 to 12.5 percent at export level. Uganda publishes named export grades by region and by screen retention with defect tolerances attached to each, and the tolerances do not slide evenly with screen size, so read the tolerance for the grade you are actually selling into. Cupping, the tasting step, sits beyond grading and is where the processing decisions you made months earlier are finally priced.
Choosing a Coffee Processing Route as a Farm Business
Turning kiboko into FAQ is the step within reach of a Ugandan farmer group, and it is worth being exact about what it involves. The coffee is transported to a hullery, hulled for a charge per kilogramme, a commission is taken, and the group carries the weight loss that the out turn describes. The gain is that clean coffee sells as a different product at a different price, and the handbook works the margin through on its own figures, which the FAQ below summarises. That arithmetic only works if the lot arrives dry, clean and weighed.
Licensing is a real consideration and the published detail is thin. The regulator operates separate licence categories including pulpery operator and huller operator alongside processor, grader, buyer and exporter, each with its own application route. The category names are published; the requirements are not, because the pages that should carry them carry placeholder text instead. Coffee regulation in Uganda has also been reorganised, and the regulator's functions now sit as a department inside the ministry, so confirm the current requirements and fees directly with the ministry's coffee department rather than from any secondary description, including this one. No fee or condition is quoted here for that reason.
Machine choices and what each one costs to run are compared under coffee processing machines, and current indicative levels for kiboko, FAQ and parchment sit on the coffee price page. Buyers for each of those products are listed under where to sell coffee.
Where Uganda's Coffee Value Addition Actually Stops
It is worth knowing how far along the chain Ugandan coffee travels before it leaves, because it reframes what value addition means for a farmer. Uganda's own export declarations, read at the most detailed commodity code available, tell the story plainly.
Two readings of that, and both are useful. For a farmer, the reachable step is clean coffee rather than a roastery, because that is the step with equipment within reach, a buyer already waiting and a published price. For anyone drawn to the idea that Uganda should roast what it grows, the trade data says the country currently does almost none of it, which makes that an argument about building an industry rather than about a decision a smallholder makes next season.
A note on how those figures were read, since it matters. The declaration flag on Uganda's trade rows carries no information on an aggregated row and the world total for any commodity code is computed rather than declared, so the figures above come from summing Uganda's own bilateral declarations at six digit codes. They sum exactly to the published totals, which is the integrity check.
Frequently Asked Questions
Which processing method gives better coffee, wet or dry? Wet processed coffee is rated superior in physical appearance and in the cup, and it sells as a different product. That does not make it the right choice everywhere, because it needs clean water in quantity, equipment, and same day pulping. Uganda's pattern reflects that: about 85 percent of national production is dry processed Robusta, and wet processing concentrates in the high altitude Arabica areas.
What is the difference between kiboko, parchment and FAQ? Kiboko is whole cherry dried with the bean still inside, from the dry route. Parchment is the pulped and washed bean still in its papery covering, from the wet route. FAQ, or fair average quality, is the clean bean that comes off a huller from either route, and it is what exporters buy. They are three different products with three different prices, so never compare a quoted price for one against a quoted price for another.
How much water does wet processing need? Between 2 and 10 litres per kilogramme of fresh cherry in the full wash route. A pulper with a mechanical mucilage remover cuts it to about half a litre per kilogramme, which is the main practical argument for the semi wash route where water is scarce or has to be carried.
Can I ferment coffee for longer to improve the flavour? Not on the published guidance. Fermentation runs one to two days in the full wash route and over fermentation is listed as a named defect, along with poor hygiene in the fermentation tanks. No alternative timing is published in either national handbook, so extending it is an experiment on your own crop rather than a technique.
Is it worth hulling my own coffee before selling? The handbook's worked scenario puts the margin improvement from converting kiboko to FAQ at roughly 30 to 50 percent, after transport, loading, the hulling charge per kilogramme and a commission. Whether it works for you turns on your out turn, the hulling rate you are quoted and whether you can reach the buyers who purchase clean coffee. Get the hulling charge in writing per kilogramme, test your out turn first, and compare the result against the day's indicative prices for both products.
Do I need a licence to process coffee in Uganda? Separate licence categories exist for pulpery operator and huller operator, alongside processor, grader, buyer and exporter. The requirements and fees are not published in usable form, and coffee regulation has been reorganised so that the regulator's functions now sit as a department inside the ministry. Ask the ministry's coffee department directly before buying equipment, and do not rely on a secondary account of what a category requires.
Why does my hulled coffee have so many broken beans? Two common causes. Over dried coffee breaks easily during hulling and is listed as a named defect, so the problem may have started in the drying yard. And huller speed matters: hullers run at 450 to 800 revolutions a minute, with higher speeds giving a more polished look and more breakage, so ask what speed a hullery runs and whether it can be lowered for your lot.
Choosing a route is mostly a question of what equipment you can reach and what water you have. Compare quotations from more than one supplier of pulpers, mucilage removers, hullers, sieves, moisture meters and sisal or jute sacks, ask to see a machine running on your own coffee before paying for it, and confirm licence requirements with the ministry's coffee department rather than from a price list. This page sits in the value addition guides, drying is covered in the coffee drying guide, and the crop itself in coffee farming in Uganda.