Grinds - Coffee
Grinds - Coffee
Mechotech designs and manufactures turnkey natural colour extraction plants for coffee grinds. In the Mechotech catalogue, Grinds - Coffee is listed in the Brown Colour group alongside Bark - Oak Bark / Birch, Hulls - Walnut, Roots - Dandelion, Plant - Yellow Dock, Woody Stems - Ivy, Shoots - Golden Rod and Leaves - Tea / Sumac. Mechotech’s article on coffee grounds describes the brown as melanoidins, tannins and chlorogenic-acid derivatives — water-soluble, stable across a wide pH range and heat-tolerant.
Mechotech’s coffee grinds plant is configured around the water-soluble brown pigments and the target colour extract. It is built in SS 316L with integrated solvent recovery, automation and full documentation, and is delivered as a commissioned turnkey system. Because the pigments are robust, extraction is centred on hot-water leaching, with mild alkali as an option to raise yield; the route is established during process development and pilot validation.
Technical Specifications
| Product | Grinds - Coffee Natural Colour Extraction Plant |
|---|---|
| Raw Material | Coffee grinds (spent coffee grounds) |
| Plant Part / Feed Form | Spent coffee grounds, collected and dried (exact feed form confirmed with the client) |
| Colour Group | Brown Colour |
| Pigment Class | Melanoidins, tannins and chlorogenic-acid derivatives (water-soluble, pH-stable brown) |
| Extract Type | Natural colour extract (liquid concentrate or dried powder, per specification) |
| Extraction Method | Closed jacketed SS 316L extraction with food-grade solvent (alcohol / aqueous), multiple cycles at controlled temperature |
| Product-contact Material | SS 316L |
| Filtration System | Plate-and-frame filter press with cartridge polish filters |
| Concentration System | Falling-film / vacuum evaporator with solvent recovery |
| Drying System | Spray or vacuum dryer |
| Automation | PLC-based |
| Plant Capacity | Configured to requirement |
| Utility Requirements | Steam, chilled/cooling water, compressed air and power (project-specific) |
| Compliance | GMP hygienic design; full documentation for qualification |
| Final Product Form | Natural colour extract (brown colourant) |
Plant Capacities
| Plant Scale | Raw Material Throughput | Typical Use |
|---|---|---|
| Pilot | Configured to your feedstock and trial plan | Product development, parameter validation |
| Semi-Commercial | Configured between pilot and commercial scale | Scale-up trials, contract manufacturing |
| Commercial | Configured to raw-material supply and confirmed buyer volume | Commercial production |
Capacity is configured to raw-material supply, confirmed buyer volume and investment timeline; a pilot plant is recommended to validate parameters before scaling.
Manufacturing Process
Raw Material Preparation
Spent coffee grounds are collected, dried and screened so that the feed is uniform and free of foreign matter.
Extraction
The prepared grounds are extracted with hot water, or with food-grade solvent where the route requires it, in closed jacketed SS 316L extractors over multiple cycles; mild alkali can be evaluated to raise yield.
Filtration
The extract (miscella) is clarified through a plate-and-frame filter press followed by cartridge polish filters.
Concentration & Solvent Recovery
The miscella is concentrated in a falling-film / vacuum evaporator, with solvent recovered through the condenser return system so that heat exposure of the pigment stays low.
Standardisation
The concentrate is assayed for colour strength and adjusted to the declared target specification before the final finishing step.
Drying & Quality Control
The standardised Coffee Grinds extract is spray- or vacuum-dried where a powder is required, then released after the agreed assay, residual-solvent, heavy-metal, microbial and moisture tests.
Major Plant Equipment
- Raw material cleaning and size-reduction system
- Closed jacketed SS 316L extraction vessels
- Solvent storage tanks
- Plate-and-frame filter press
- Cartridge polish filtration
- Falling-film / vacuum evaporator
- Solvent recovery unit and condensers
- Standardisation / blending vessel
- Spray or vacuum dryer
- CIP system
- Automation and instrumentation
Plant Output
Applications
- Natural colour and dye ingredient supply
- Food and beverage colour applications (subject to approval of the specific colour in each market)
- Cosmetic and personal-care colour applications
- Nutraceutical and Ayurvedic / herbal formulations
- Pharmaceutical standardised ingredient supply
Key Features
SS 316L Construction
Electropolished SS 316L product-contact surfaces with CIP operation between batches.
Closed-Loop Solvent Recovery
Integrated condenser-return recovery reuses solvent between batches and reduces solvent loss.
Robust Brown Pigment Recovery
The brown pigments are water-soluble and stable across a broad pH range, so extraction does not need the acid protection that anthocyanin colours require.
Standardised to Specification
In-process and batch-release assay are used to check the finished extract against its declared target specification.
Gentle Concentration
Vacuum concentration keeps heat exposure low for temperature-sensitive colour compounds.
Scalable Batch Capacity
Plants are configured to requirement from pilot scale upward, with modular expansion.
Frequently Asked Questions
Does Mechotech supply the complete machinery for Grinds - Coffee?
What specification can the Grinds - Coffee plant achieve?
What production capacities are available for the Grinds - Coffee plant?
Which raw material is processed in the Coffee Grinds plant?
What gives coffee grounds their brown colour?
How does this page differ from Mechotech’s other coffee pages?
Which related colour pages does Mechotech list with Grinds - Coffee?
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