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Cassava Flour Processing Plants
Starch, Flour, Edible Oil & Food Processing

Cassava Flour Processing Plants

A cassava flour plant makes a fine, unfermented flour from peeled whole roots by grating or chipping, pressing, drying and milling.

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Cassava Flour Processing Plants

Because the fibre stays in the product and no starch is washed out, there is no separation stage, and water use is lower than on a starch line. The feed is fresh roots with high dry matter and low levels of bitter cyanide, handled within a day or two of harvest. The flour goes to bakers, noodle and snack makers, composite-flour blenders and households, with peel and press liquor as the main residues. A buyer should settle the root supply and variety, the flour fineness, moisture and colour to be sold, and the pack format. The design is then decided by the press, the dryer and its heat source, because the cyanide removal and most of the running cost sit in dewatering and drying. Peeling comes first, since the peel carries more cyanide than the flesh. Finished flour is sensitive to moisture, so the milling, sifting and packing area is planned with dust control and dry storage in mind.

Roots are peeled and washed, because cyanogenic glycosides are concentrated in the peel, and then grated to a mash or sliced into chips. Grated mash goes to a screw or hydraulic press that squeezes out juice, which carries the soluble cyanide and a large share of the water. The pressed cake is lumpy, so a disintegrator and sifter loosen it before it enters a flash dryer, where the large surface area of the loose particles gives fast drying at fairly high air temperatures without scorching. Dried material is milled and screened to the required fineness. The route is unfermented, so the safety work is physical: grating, pressing and drying do the detoxification, and drying alone cannot be relied on. That makes the press a food-safety item as well as a dewatering machine. The main design choices are peeling method, grater or chipper, press type, flash dryer or a cabinet or tray dryer for chips, and the heat source. Heat generation deserves the closest look, because flash dryers with an inefficient heat source have been shut down in Nigeria when the flour became too costly to make. Milling and screening are sized for the fineness the buyer's customers specify.

Indicative Capacity Range

  • 1–20 tonnes fresh roots/day

Key Specification Inputs

Cyanogenic compound reduction, water balance, dewatering, drying.

Technical Specifications

TechnologyPhysical, unfermented route: peeling, grating or chipping, pressing, drying and milling
FeedFresh whole roots with high dry matter and low bitter cyanide, processed within a day or two of harvest
PeelingMechanical peeler or manual peeling station, chosen by root shape, labour cost and loss tolerance
Size ReductionGrater for wet mash, or chipper or slicer for a chip-drying route
DewateringScrew or hydraulic press, the step that removes soluble cyanide with the juice
Cake HandlingDisintegrator and sifter ahead of the dryer to give loose, uniform particles
DryingFlash dryer for loose cake; cabinet or tray dryer where chips are dried
Heat SourceBiomass, gas, oil or electric heating, chosen by local fuel cost and supply
Milling and SievingMill and screen set by the fineness the market asks for, with dust extraction
UtilitiesWash water, electric power for grater, press, mill and fans, and fuel for the dryer
Final OutputDry cassava flour graded by fineness, sacked, plus peel and press liquor

Typical Process Route

1

Root Selection and Receiving

Fresh roots with high dry matter and low bitterness are accepted and weighed in, and manufacture starts within a day or two of harvest. Old or woody roots lower both flour quality and throughput.

2

Peeling and Washing

A mechanical peeler or a manual peeling station removes the skin and rind, where most of the cyanide sits, and a washer clears soil. Peeling is part of the safety route, not only a cleaning step.

3

Grating or Chipping

A grater turns the roots into a wet mash, or a chipper or slicer cuts them into chips if the line dries chips instead. The route decides what the press and dryer must handle.

4

Pressing

A screw or hydraulic press squeezes the mash, removing water and the soluble cyanide in the juice. Press performance sets how heavy the load on the dryer is, and the liquor needs a handling route.

5

Disintegrating and Sifting

The pressed cake is broken up and sifted so that the dryer receives loose, uniform particles. Lumps dry slowly and leave damp centres.

6

Drying

A flash dryer takes the loose cake with hot air and dries it in seconds, while a cabinet or tray dryer suits chips. The heat source and burner control decide how much fuel each tonne of flour costs.

7

Milling and Sieving

Dried material is milled and screened to the fineness the buyer sells, with oversize returned for re-milling. Fine flour dust is controlled here by extraction and by keeping the room clean.

8

Packing and Storage

Flour is bagged in a dry area and stored off the floor. Moisture quickly spoils flour, so packing material and storage conditions are part of the line.

Process & Equipment Modules

  • Root receiving and weighing point
  • Peeling machine or manual peeling station
  • Root washer
  • Grater, or chipper and slicer
  • Screw or hydraulic press
  • Cake disintegrator and sifter
  • Flash dryer with burner or heat exchanger and cyclone
  • Cabinet or tray dryer for chip routes
  • Hammer or pin mill with screens
  • Sifter and fineness grading screen
  • Dust extraction at mill and packing
  • Bagging and packing station

Plant Output

Dry cassava flour in fineness gradesPeel for feed use or compostingPress liquor for controlled handling or treatmentOversize returned to the mill for re-milling

Applications

  • Composite flour with wheat for bread and pastry
  • Gluten-free baking mixes and flat breads
  • Stiff porridge and traditional dough-type staple meals
  • Noodles, biscuits and snack products
  • Thickener for soups, sauces and instant food mixes
  • Binder and adhesive use where starch purity is not needed
  • Dried peel, once separated, as an animal-feed ingredient

Key Features

  • Press as a Safety Item

    The press removes the soluble cyanide with the juice, so press type and dewatering performance are judged for food safety as well as for how dry the cake is.

  • Peeling Ahead of Grating

    Peel carries more cyanide than the flesh, so peeling and washing come before grating and carry part of the safety load.

  • Cake Breaking Before the Dryer

    A disintegrator and sifter feed the dryer with loose particles that dry quickly and evenly instead of in lumps.

  • Heat Source Under Scrutiny

    Fuel burner, heat exchanger and controls decide running cost, so the heat source is evaluated together with the drying duct.

  • Dust-Controlled Milling and Packing

    Fine flour dust is drawn off at the mill and sifter, which keeps the room clean and the product dry.

Country Pages for Cassava Flour Processing Plants

This product is listed on the pages of the countries below, each with its own enquiry route. Where Kadali has no office in a country, enquiries are handled from the Accra office.

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Frequently Asked Questions

What information is needed to size Cassava Flour Processing Plants?
Tonnes of fresh roots a day, how many hours and months a year the line will run, and the distance roots travel to the plant. Add the flour fineness, moisture and colour you will sell, the pack format, the local fuel for the dryer, and the water on site for washing. Press and dryer capacity follow the daily root volume, and the heat source follows fuel cost and supply.
What capacity range does Cassava Flour Processing Plants cover?
The indicative capacity range is 1–20 tonnes fresh roots/day. It is stated on a fresh roots basis per day, so restate your own volume on that basis and say how many hours a day the plant will run.
Why is cassava peeled before the flour route begins?
The cyanide concentration rises from the centre of the root outwards and is much higher in the peel. Peeling and washing therefore come ahead of grating and pressing, and they take out a large share of the cyanogenic material before any machine handles the flesh. A line that skips or rushes peeling puts more load on the press and the dryer.
Does cassava flour rely on fermentation to remove cyanide?
No. In this route detoxification is physical, through grating, pressing and drying, and it leaves no sour taste or smell. Drying alone is not enough: briefly sun-drying fresh pieces frees the cyanide poorly. That is why the press and the peeling step should be treated as safety equipment, with the flour tested before sale.
What should I compare when looking at presses?
The press squeezes out water and the soluble cyanide in the juice, so compare press type, how dry the cake leaves it, how easily it is cleaned and how well the cake can be broken up afterwards. Ask whether the dryer was sized for that cake dryness, and where the press liquor will go, since it holds the cyanide that was removed.
Why does the dryer heat source matter so much?
Flash dryers use a lot of heat, and many have been idled because an inefficient heat source made the flour too expensive to produce. Compare fuel use per tonne of flour, local fuel prices and burner control before comparing prices of the dryer itself. See industrial hot-air drying systems for the dryer options.
Is cassava flour suitable as a partial wheat replacement in bread?
Yes, as one non-wheat component in composite flours. Commercial-scale work has shown bread is possible with part of the wheat flour replaced, and the usable share depends on the recipe. A bakery customer will test a flour in its own formula, so fineness and colour consistency matter more than the headline replacement level.
Do I need a starch plant instead of a flour plant?
Choose flour if you want to sell a whole-root product and keep the plant simple, with lower water use and no effluent from fibre washing. Choose a cassava starch plant if your market wants pure starch, which needs wet milling and fibre separation. The two lines differ in water, machinery and customers, not just in the final stage.
How do I request a proposal for Cassava Flour Processing Plants?
Use the Request a Quote page and describe your project. Describe the flour you want to sell (fineness, moisture, colour, pack), your root supply and the volumes you expect.

Enquire about Cassava Flour Processing Plants

Send your raw material, target product and capacity to Kadali Africa Ventures for a technical proposal.

Request a QuoteWhatsApp