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Fruit & Vegetable Dehydration Plant
Drying & Dehydration Systems

Fruit & Vegetable Dehydration Plant

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Fruit & Vegetable Dehydration Plant

Fresh produce can hold up to 95 percent water, enough to support enzyme activity and microbial growth, so fruit and vegetables spoil quickly after harvest in warm climates. Dehydration takes out a controlled share of that water so the crop keeps, weighs far less to ship and can be sold as flakes, slices, granules or powder. This page is for fruit aggregators, juice makers, food processors and farmer cooperatives deciding whether to dry, and how. Four points need settling before a line can be sized: which crops and for how many months of the year, how much fresh produce arrives per hour, the form and moisture the buyer wants, and which heat source the site can rely on. A standalone raw-produce dehydration line is scoped project by project after engineering review, not offered as a fixed catalogue item.

Plant sizing begins with a mass balance. A fresh-input rate is converted, after trimming, peeling and water removal, into a much smaller finished output, so the dryer is sized on the water to be removed, not on the fresh or the dried tonnage alone. The line itself runs from receiving and washing through peeling and cutting, optional pretreatment such as blanching, drying, and then cooling, grading and packing. Drying is where the choice of dryer is made, and the range includes vacuum tray, fluidised-bed, vacuum paddle, freeze and spray dryers, each suited to a particular feed: pieces, granules, pastes or liquids.

Indicative Capacity Range

  • 100–5,000 kg wet feed/hour

Key Specification Inputs

Slice size, moisture target, heat source, food hygiene.

Technical Specifications

Project typeFruit and vegetable dehydration, engineered to each project
Range statusDrying equipment is available as listed items; a complete raw-produce dehydration line is scoped per project and is not a standard product
Dryers in the rangeVacuum tray, fluidised-bed, vacuum paddle, freeze and spray dryers
Crops consideredMango, banana, pineapple, apple, papaya, amla, berries, coconut, onion, garlic, tomato, carrot, beetroot, potato, chilli, ginger and leafy vegetables; each crop is confirmed per project
Finished formsFlakes, slices, granules or powders, according to the crop and the buyer's specification
Sizing methodMass balance running from fresh input, through preparation losses and water removal, to finished yield
Inputs to settle firstSlice size, target moisture and the heat source the site can rely on
Wetted materialSS 316L or another grade suited to the process, electropolished, with CIP capability on the listed dryers
Capacity basisSet to the requirement

Typical Process Route

1

Receive, Sort and Wash

Produce is checked on arrival, damaged or rotten pieces are taken out, and the batch is washed to remove soil, dust and other contamination before it goes further.

2

Peel and Cut

Where the crop needs it, skin is removed, and pieces are cut, sliced, shredded or diced to an even size, since slices of the same thickness need the same drying time. For hot-air drying most produce is cut into strips not more than 5 mm thick; the size for your crop is settled in the trial.

3

Pretreat

Blanching stops enzyme action that drying alone may not. It is chosen crop by crop and is not a universal step: most vegetables are blanched before drying, but not onions or garlic.

4

Dry

Water is removed under controlled temperature, airflow, humidity, load depth and time in the dryer. For hot-air drying the air is usually kept at about 50-70 degrees Celsius because higher temperatures cause discolouration, and the critical moisture level is about 10-15 percent depending on the commodity; garlic, for example, is dried to about 5 percent. Overdrying makes some products brittle, while too little drying leaves the product unstable.

5

Mill and Sieve for Powders

If a powder is required, the dried material is milled once it reaches a suitable moisture, then sieved to the target particle size.

6

Cool, Grade and Pack

Dried product is cooled, graded and packed in a way that protects it from moisture for the shelf life the buyer expects.

Major Plant Equipment

  • Receiving, sorting and washing section
  • Peeling, cutting and size-reduction machines
  • Vacuum tray dryer
  • Fluidised-bed dryer
  • Vacuum paddle dryer
  • Freeze dryer (lyophiliser)
  • Spray dryer for liquid and puree feeds
  • Milling and sieving section for powder routes
  • Clean-in-place (CIP) skid
  • PLC panel and instrumentation

Plant Output

Dried flakes, slices and granulesFruit and vegetable powdersFreeze-dried product

Applications

  • Dried fruit and vegetable ingredients for food manufacturers
  • Onion and garlic dehydration for seasonings and processed foods
  • Dried flakes, slices and granules
  • Fruit and vegetable powders
  • Plants that handle several seasonal crops in turn
  • Dehydrated ingredients prepared for export buyers

Key Features

  • Sized on Water Removed

    A mass balance links fresh input to finished yield, so the dryer is sized on the water to be removed and not on fresh tonnage or dried output alone.

  • Dryer Follows the Product

    Pieces, granules, pastes and liquids need different dryers, and heat-sensitive crops call for gentler conditions. The choice is made from the product, not the other way round.

  • Hygiene Built into the Layout

    Food-contact materials, cleanable surfaces, drainage and a separation between raw and finished zones are planned from the start, with CIP on the listed dryers.

  • Planning for Seasonal Crops

    A line serving several crops through the year is feasible where cleaning, product compatibility and scheduling are managed.

Related Products

Frequently Asked Questions

What should I decide before asking for a dehydration plant?
Decide the crops and how many months they are available, the fresh tonnage per hour or day, the finished form and final moisture, and the heat sources the site can run. These govern dryer type, size and utilities.
Which dryers are in the range, and how do I choose?
The range includes vacuum tray, fluidised-bed, vacuum paddle, freeze and spray dryers. Broadly, pieces and slices suit tray-type drying, granules suit fluidised-bed drying, pastes suit paddle drying, and liquids or purees suit spray drying, a widely used technique for drying liquid products such as fruit juices into powder. Freeze drying is expensive and time-consuming but among the most gentle drying methods. For hot-air options see industrial hot-air drying systems.
How does the heat source affect the plant?
Dryers can be heated by steam, hot water, electricity, gas or biomass-fired air heaters, and some sites add solar assistance. The right choice depends on what is reliable and affordable locally, and it changes the utilities and the running cost. Weak grid supply or costly fuel is a reason to discuss the option early, including solar-assisted drying systems.
Why is finished output so much smaller than fresh input?
Fresh produce can hold up to 95 percent water, and the dryer removes it. Trimming and peeling remove more. Sizing therefore follows a mass balance, not a one-to-one comparison between fresh capacity and dried output.
What preparation do tropical crops need before drying?
Move produce to the plant quickly, keep it shaded, sort out bruised or damaged pieces, and wash thoroughly. Cutting to even size, and blanching where the crop calls for it, give more consistent drying. Agree the maturity at harvest with growers and test it on a trial run.
Can one line dry different crops?
A multi-crop plant can be considered for seasonal produce, provided cleaning, product compatibility, scheduling and food-safety requirements are managed. Onion and garlic are often dried on their own line, and the onion and garlic dehydration plants page covers that case.
Can I make powder as well as dried pieces?
Yes. Dried produce can be milled and sieved, or a puree or liquid can be spray dried. Sugar-rich purees can be sticky in a spray dryer, because the low glass transition temperature of the sugars makes the solids cling to the dryer walls, so a carrier agent may be needed; this is confirmed on trial. Choosing between the routes depends on the crop and on the particle size and flowability your buyer wants.
Should I run a trial before buying a dryer?
Yes. A pilot trial to establish the drying curve for your crop is recommended before commercial sizing; ask in your enquiry whether one can be arranged. See also the drying and dehydration systems category.
What do export buyers check on dried produce?
Expect requests for piece size or particle size, final moisture, colour and microbiological results, and traceability of lots. Dried produce takes moisture back from humid air, so moisture-proof packing and dry storage matter as much as the dryer in holding the specification through a tropical supply chain.
What should a quotation request contain?
Send the crop or crops, the fresh input per day, the product form, the target moisture, the available utilities and the location, plus season length. Then request a quote.

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