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Coffee Extraction & Concentration Plants
Specialty Food, Beverage & By-Product Processing

Coffee Extraction & Concentration Plants

A soluble coffee extraction and concentration plant takes roasted and ground coffee, extracts the soluble solids with hot water, concentrates the extract and, where powder is wanted, dries it.

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Large stainless-steel extraction vessel with a hinged manway lid, a vapour column and an insulated shell-and-tube condenser in a plant hall

Coffee Extraction & Concentration Plants

The feed is roasted coffee, so green-bean cleaning, hulling and roasting sit upstream in a separate scope. The product is a liquid extract, a concentrate, or after drying an instant powder or granule. A buyer should settle first whether the end product is concentrate or powder, which roast and blend the line will run, and whether the flavour of the finished product justifies an aroma recovery circuit. Those choices decide the number of extraction stages, the evaporator type, the dryer and the steam demand. Spent grounds leave the line in large volume, wet and rich in oil, so a route for them belongs in the site plan from the start, often as boiler fuel.

Roasted beans are ground to a size that exposes the soluble material without choking the extraction column. The grounds then pass through several stages of hot-water extraction, usually in columns connected in series so that fresh water meets the most exhausted grounds and the strongest extract leaves the freshest. Grind size, water temperature and the number of stages are process choices, and a darker roast gives a different extract from a lighter one, so the roast is fixed before extraction targets are written. The extract is clarified and then concentrated by evaporation, which drives off water but also carries volatile aroma away with it. Where flavour matters, the aroma is stripped from the extract with steam first, held aside and added back to the concentrate before drying. Drying is the largest choice: spray drying gives high throughput and lower running cost but loses more volatile flavour, while freeze drying keeps more aroma at higher capital and energy cost. Instant granules are normally agglomerated after drying. Steam is the main utility, and the spent grounds can fire the boiler that makes it.

Indicative Capacity Range

  • 100–5,000 kg feed/day

Key Specification Inputs

Extraction solvent/water, extraction stages, batch time, filtration and recovery.

Technical Specifications

TechnologyHot-water extraction of roasted and ground coffee, evaporative concentration and optional drying
FeedRoasted and ground coffee; roast degree and grind are fixed before the extraction is designed
Extraction ArrangementColumns in series or batch vessels, with the number of stages set by the target solids and the coffee type
Aroma HandlingOptional steam-stripping circuit, with the recovered aroma added back to the concentrate before drying
ConcentrationFalling-film evaporation, single or multiple effect, chosen by steam cost and flavour target
Drying OptionsSpray drying for throughput, freeze drying for aroma retention, or concentrate only with no dryer
Heat SourceSteam from a boiler that can burn spent grounds or another local fuel
Contact MaterialFood-grade stainless steel on all product-contact parts, with cleaning circuits for the extraction and evaporation sections
AutomationPLC control of extraction temperature, flow, evaporator and dryer, with batch records
UtilitiesSteam, cooling water, clean process water, electric power and compressed air
Final OutputLiquid extract, concentrate, or instant powder or granules, with wet spent grounds as a by-product

Typical Process Route

1

Fixing roast and grind

The roast level and grind of the incoming coffee are set before anything else, because they change the solids, flavour and filtering behaviour of the extract. Blends that vary from week to week make steady extraction harder.

2

Staged hot-water extraction

Ground coffee is extracted in several stages, usually in columns in series with water moving against the flow of grounds. Control the temperature and the water-to-coffee ratio, because both set the solids drawn out and how harsh the extract tastes.

3

Separating spent grounds

Grounds are drained and pressed to recover extract that would otherwise leave with them. Fines carried into the extract are removed in this step so that they do not foul the evaporator later.

4

Clarifying the extract

Remaining fines and sediment are taken out by a centrifuge or fine filter, leaving a clear liquid. Poor clarification shows up later as scale on heating surfaces and cloudiness in the product.

5

Aroma recovery

Steam strips the volatile aroma from the extract or from the first evaporation stage and condenses it separately. The aroma is kept cool and sealed until it is added back, since it is lost quickly to heat and air.

6

Concentration by evaporation

Water is evaporated under vacuum, often in a multiple-effect falling-film unit, to a high-solids concentrate. Short heat exposure protects flavour, and the number of effects trades capital cost against steam use.

7

Aroma add-back and drying

Recovered aroma rejoins the concentrate, which is then spray dried or freeze dried. Spray drying favours throughput and cost, freeze drying favours retained aroma, and the choice should follow the product and its price.

8

Agglomeration, cooling and packing

Powder from a spray dryer is often agglomerated into granules that dissolve better, then cooled and packed in moisture-proof packaging. Instant coffee takes up moisture quickly, so the packing room must be dry.

Process & Equipment Modules

  • Grinder for roasted coffee, where grinding is in scope
  • Extraction column battery with hot-water heater
  • Grounds press and conveyor
  • Extract centrifuge and polishing filter
  • Aroma stripping and recovery unit
  • Multiple-effect falling-film evaporator
  • Concentrate holding and blending tanks
  • Spray dryer or freeze dryer
  • Agglomerator and cooling section
  • Steam boiler suited to spent-grounds firing
  • Packing station with moisture-proof liners
  • PLC and HMI control panel

Plant Output

Liquid coffee extractCoffee concentrateInstant coffee powder or granulesRecovered coffee aromaSpent grounds for fuel or oil recovery

Applications

  • Instant coffee powder for jars and sachets
  • Freeze-dried coffee granules for premium instant products
  • Liquid coffee concentrate for beverage makers
  • Extract bases for ready-to-drink and cold-brew coffee
  • Soluble coffee for 3-in-1 sachet mixes and vending drinks
  • Coffee extract as a flavour in dairy, ice cream and bakery products
  • Spent coffee grounds as boiler fuel or as a source of coffee oil

Key Features

  • Countercurrent Extraction Columns

    Fresh water meets the most exhausted grounds, which draws out more soluble solids per kilogram of coffee than a single batch soak and gives a stronger extract.

  • Aroma Recovery Circuit

    Steam stripping and add-back keep volatile aroma that evaporation would otherwise lose. Where the point of add-back sits is a design choice worth asking about.

  • Low-Temperature Evaporation

    Vacuum evaporation, with several effects where steam is costly, concentrates the extract while limiting the heat the flavour is exposed to.

  • Dryer Matched to the Product

    Spray drying suits high throughput at a lower cost, freeze drying suits a premium product where aroma retention pays for the extra energy.

  • Spent-Grounds Handling

    Pressing and conveying the wet grounds to a boiler or a drying area is part of the line, not a separate afterthought.

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Frequently Asked Questions

What information is needed to size Coffee Extraction & Concentration Plants?
The kilograms of roasted coffee extracted per day and the hours the plant will run, the roast degree and grind, the target extract solids, and whether the end product is concentrate, spray-dried powder or freeze-dried granules. Also give the steam source and cost, cooling water, and where the spent grounds will go, since these set the boiler, evaporator and dryer.
What capacity range does Coffee Extraction & Concentration Plants cover?
The indicative capacity range is 100–5,000 kg feed/day. It is stated on a feed basis per day, so restate your own volume on that basis and say how many hours a day the plant will run.
Is freeze drying better than spray drying for instant coffee?
Neither wins on every measure. Spray drying gives high throughput and low running cost, but its high temperatures cause larger losses of volatile flavour. Freeze drying keeps more of the non-volatile and aroma character but costs more to build and run. Laboratory comparisons of dried coffee were done on specialty coffee, so for a mass-market blend the choice depends on the price the product must reach and how much aroma your customers expect.
Is an aroma recovery circuit worth adding?
Evaporation removes volatile aroma along with the water, and the loss lowers product quality. A steam-stripping circuit takes the aroma off first and adds it back to the concentrate before drying. It adds equipment, cooling and control, so it makes most sense for a product sold on flavour. Ask any proposal where the aroma is collected, how it is stored and where it rejoins the concentrate.
How many extraction stages and what grind should a proposal assume?
Instant coffee extraction uses finely ground coffee and several hot-water stages. A finer grind raises extraction but slows drainage and sends more fines downstream, so grind and stage count are linked. Compare proposals on the number of stages assumed, the grind they are based on and the solids of the extract produced. A design based on a different roast or grind from yours will not behave the same way.
How does roast level change the extraction plant?
In laboratory work, darker roasts gave more dissolved solids but a lower polyphenol content than lighter ones, and flavour differs too. Fix the roast and the blend you will run before extraction conditions and yield targets are written down. Switching roast later changes the extract composition, the evaporator duty and the dryer feed, so state it in the enquiry rather than leaving it open.
What happens to the spent coffee grounds?
Grounds from industrial extraction come out wet and still rich in oil, which makes them a good boiler fuel once pressed or dried. They can also be sold for oil recovery or composting. The volume is large compared with the powder made, so plan storage, a press or dryer, and a conveyor to the boiler or the dispatch area before the line is laid out.
How is this different from a coffee processing plant?
A coffee processing plant works on green coffee, with cleaning, hulling, grading and roast-and-grind. This plant starts from roasted and ground coffee and makes extract, concentrate or instant powder. Many projects need both, with roasting upstream, but they are separate scopes. For a leaf beverage extract the closest line is the tea extraction plant.
How do I request a proposal for Coffee Extraction & Concentration Plants?
Use the Request a Quote page and describe your project. Specify whether you want liquid concentrate or instant powder, the volume of roasted coffee you will extract and the quality target.

Enquire about Coffee Extraction & Concentration Plants

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

Request a QuoteWhatsApp