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Integrated Spice Processing Plants
Essential Oils, Spices & Oleoresins

Integrated Spice Processing Plants

An integrated spice processing plant runs several spices through one shared line of cleaning, grinding, sieving, optional pathogen-reduction treatment, blending and packing, in place of a separate plant for each spice.

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Installed extraction plant hall with a platform of condensers and vessels, horizontal stainless-steel tanks and dried plant material spread on the floor

Integrated Spice Processing Plants

The feed is dry whole, cracked or leaf spice such as pepper, chilli, cumin, turmeric and ginger, and these differ widely in oil content, hardness and dust, so the list of spices drives the design. A buyer should settle which spices and forms arrive and in which months, what leaves the plant (cleaned whole, ground or blended), whether the market asks for a pathogen-reduction step and where it sits, and how strictly one spice must be kept out of the next. A mass balance for each spice, with cleaning losses and screenings, shows what the line must really handle. Oleoresin and oil recovery are separate plants and are not part of this shared line.

The shared front end is receiving, sampling and cleaning: sieves, a destoner and magnets take out stones, metal and foreign matter, and an aspirator removes chaff and dust. Dry does not mean pathogen-free, because low water activity limits growth but does not kill the organisms that arrive with the material from soil, transport and storage. The plant therefore needs a decision on whether a pathogen-reduction step is applied, where it sits and how it is tested on each spice. Steam, fumigation and irradiation act differently on each spice, changing colour, odour or volatile content, so one setting cannot be assumed to fit the whole range. After a steam step the spice must be dried again and cooled. Grinding follows, and the mill type follows the spice: oily or heat-sensitive spices lose aroma when the mill runs hot, so cooling air or chilled grinding may be specified. Sifters grade the powder and a blender combines spices to a recipe. Fine organic dust can burn or explode, so dust collection and explosion protection are part of the layout. Changeover between spices needs access for cleaning, because flavour and strong irritants such as chilli carry over, and a separate chilli grinding area is a common answer.

Indicative Capacity Range

  • pilot: 100–500 kg feed/day
  • commercial: 0.5–5 tonnes/day

Key Specification Inputs

Define feedstock, desired products, mass balance, utility loads and scope.

Technical Specifications

TechnologyShared line for cleaning, size reduction, grading, blending and packing of several dry spices
Feed FormsWhole, cracked, leaf, root or seed spice, stated for each spice with its moisture
CleaningSieves, destoner, magnetic separator and air aspirator, chosen by what the incoming lots contain
Size ReductionHammer, pin or plate mill, with cooling air or chilled grinding for oily or heat-sensitive spices
GradingVibrating sifters with a screen set for each product size
Pathogen ReductionOptional steam or other treatment with re-drying and cooling, selected spice by spice
BlendingRibbon or paddle blender, sized to the recipe batch
Dust ProtectionDust collection with explosion venting or suppression around mills, sifters and blenders
Contact MaterialStainless steel on product-contact surfaces
AutomationPLC control of treatment and blending, with batch and lot records
UtilitiesElectric power for mills and air handling; steam or heat where treatment or drying is included; compressed air

Typical Process Route

1

Receiving, sampling and lot records

Each lot is weighed, sampled for moisture and foreign matter, and tagged to its supplier, because contamination often arrives with the raw material. Wet or mouldy lots are rejected or held apart.

2

Cleaning and destoning

Sieves, a destoner, magnets and an aspirator remove stones, metal, stems and dust. Dust control matters at this stage, because loose spice dust escapes easily.

3

Pathogen-reduction treatment (where specified)

Whole spice may pass through a steam or other treatment chosen and tested for that spice. The same setting can change colour, odour or volatile content differently from one spice to the next.

4

Re-drying and cooling

Steam treatment adds moisture, so the spice is dried again and cooled to a safe storage moisture before grinding or packing. Warm, damp spice grows mould in the bag.

5

Cracking and grinding

Mills reduce the spice to the size the customer wants. Oily or aromatic spices heat up in the mill and lose volatile aroma, so cooling air or chilled grinding is considered, and chilli is ground apart from other spices.

6

Sieving and grading

Sifters separate the powder by particle size and return oversize to the mill. Particle size affects flow, colour and how a blend sits in a food product, so it is specified.

7

Blending

Measured quantities of ground spice are mixed in a blender to a recipe until the mix is even. Cleaning between recipes is written down, because a trace of one spice shows up in the next.

8

Packing and dry storage

Spice is packed in moisture-barrier bags or tubs and stored dry and free of pests. Spice that takes up moisture can still support mould, even though dry spice is a low water activity product.

Process & Equipment Modules

  • Receiving hopper with sample point
  • Vibrating cleaner and destoner
  • Magnetic separator
  • Air aspirator
  • Steam treatment unit, where specified
  • Dryer and cooler for treated spice
  • Hammer or pin mill with cooling air
  • Vibrating sifter
  • Ribbon blender
  • Cyclone and bag-filter dust collector
  • Packing machine for bags or tubs
  • PLC and control panel

Plant Output

Cleaned whole spicesGround single spicesBlended seasoningsPre-cleaned spice for extraction linesScreenings, stones and dust for separate disposal

Applications

  • Ground single spices for retail packs and food service
  • Cleaned whole spices for domestic and export trade
  • Blended seasonings such as curry powders and suya-style spice mixes
  • Spice supply for meat, snack and noodle producers
  • Seasoning bases for stock cubes and soup mixes
  • Pre-cleaned, sized spice as feed for oleoresin or oil extraction

Key Features

  • Shared Front End

    One receiving, cleaning and sieving section serves every spice, so that equipment is not duplicated for each product.

  • Mill Matched to the Spice

    Mill type, speed and cooling are chosen for the oil content and hardness of each spice, which protects aroma and avoids clogging.

  • Treatment Tested Spice by Spice

    A pathogen-reduction step is placed in the flow and checked on each spice and form, because its effect on colour and aroma differs.

  • Quick Changeover

    Smooth internal surfaces, access doors and drain points let operators clean between spices and cut flavour carry-over.

  • Dust and Explosion Protection

    Collection hoods, cyclones, bag filters and explosion venting are laid out around the mills, sifters and blender.

Country Pages for Integrated Spice 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 Integrated Spice Processing Plants?
The list of spices with the form and moisture of each, how much of each arrives per day and in which months, and the products leaving the plant (cleaned whole, ground or blended). Add whether a pathogen-reduction step is needed, how much chilli the plant will handle, the packing format and the shifts per day. A mass balance by spice, including cleaning losses, sets the equipment sizes.
What capacity range does Integrated Spice Processing Plants cover?
The indicative capacity range is pilot: 100–500 kg feed/day; commercial: 0.5–5 tonnes/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.
Can all spices share one line?
The front end can: receiving, cleaning and sieving suit most dry spices. Grinding is where they diverge, because oily spices heat up in the mill, hard seeds wear screens, and chilli dust irritates and carries over into the next product. Many projects share cleaning and blending but give chilli its own grinding area. Decide this before the layout is drawn, since it sets the number of mills and the dust collection.
Does dry spice need a pathogen-reduction step?
Drying and dry storage are not a kill step. Low water activity limits growth, but pathogens can survive for long periods in dry spice, and contamination enters from soil, transport and storage. Surveys show a wide range of bacteria and fungi on cumin, cayenne pepper, ginger, white pepper and black pepper. Whether to add a treatment, and where, depends on the buyer's specification and the spice, so settle it with your customers before sizing.
Does one treatment suit every spice?
No. In sensory comparisons the same fumigation left black peppercorn unchanged but altered the look and smell of cumin, and vacuum steam changed the volatile profile of peppercorn. Irradiation left pepper, cumin and oregano unchanged, while onion powder changed colour and lost nearly all its measured volatiles. Test each spice and form against its sensory specification, and check that the method is accepted in the destination market.
How should finished spice be stored?
Dry and sealed. Moulds resist stress and can keep growing even at the low water activity of dry spice, so a lot that takes up moisture should be treated as a mould risk. Use moisture-barrier packing, keep stock off floors and walls, control pests and re-test moisture on lots held for long. Spice that arrives too wet needs drying first; see spice and herbal drying plants.
What dust precautions does a spice mill need?
Fine organic dust can burn or explode when dispersed in air and ignited, so mills, sifters, conveyors and blenders need dust collection, and the collector may need explosion venting or suppression. Keep hot surfaces and sparks away from dust, clear deposits routinely and earth metal parts. The extent depends on the spices and the particle size, so give the proposal your product list.
Where do oleoresin and spice oil fit in?
Not in the shared line. Oleoresin or oil recovery is a separate extraction or distillation plant that takes cleaned, sized spice as its feed. If your plan includes one, see spice oleoresin extraction plants and ask the proposal to show where the two plants hand over.
How do I request a proposal for Integrated Spice Processing Plants?
Use the Request a Quote page and describe your project. Write down the spices, the products you want from them, expected annual volumes and the markets you will sell into, then ask the proposal for a mass balance and a utilities list.

Enquire about Integrated Spice Processing Plants

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

Request a QuoteWhatsApp