Garlic Oleoresin Extraction Plant
Garlic Oleoresin Extraction Plant
Mechotech designs and manufactures industrial solvent extraction plants for Garlic Oleoresin, derived from Allium sativum. The oleoresin contains allicin (formed enzymatically from alliin upon crushing), diallyl disulfide (DADS), diallyl trisulfide (DATS), and ajoene — sulfur-containing organosulfur compounds responsible for garlic's distinctive pungency and its powerful cardiovascular and antimicrobial bioactivity. Our plants are specifically engineered to manage the volatility and reactivity of garlic's sulfur compounds during extraction.
Mechotech's Garlic Oleoresin extraction plants employ food-grade ethanol extraction at tightly controlled low temperatures (20–35°C) to capture allicin and its transformation products before they volatilise. The extraction process begins immediately after crushing fresh garlic to maximise allicin yield before enzymatic conversion completes. Closed-loop solvent recovery and nitrogen-blanketed processing preserve the integrity of the labile organosulfur compounds. All systems comply with ATEX Zone 1, WHO-GMP, and FSSAI standards, and include HPLC allicin standardisation.
Manufacturing Process
Raw Material Preparation
Dried garlic flakes or fresh garlic cloves (Allium sativum) are inspected for quality. For fresh garlic processing, cloves are crushed immediately before extraction to initiate alliinase-catalysed conversion of alliin to allicin. Dried garlic is rehydrated to 15–20% moisture before crushing to activate residual alliinase enzyme activity prior to solvent contact.
Solvent Extraction
Crushed garlic is immediately loaded into SS 316L percolators cooled to 20–35°C and extracted with food-grade ethanol (95%) at low temperature. The cold extraction conditions capture allicin and partially converted thiosulfinates before they transform into DADS, DATS, and ajoene. Total extraction time is 2–4 hours per batch to minimise allicin degradation.
Miscella Filtration
The pungent, yellow-amber garlic miscella is filtered through a horizontal sparkler filter and polished through 2-micron cartridge filters under nitrogen pressure. Filtration speed is maximised to reduce allicin residence time at room temperature and prevent further organosulfur transformation during the filtration stage.
Evaporation & Concentration
Filtered garlic miscella is concentrated in a falling-film evaporator at 40–50°C under high vacuum (−0.09 MPa) to minimise thermal exposure of allicin and DADS. A wiped-film evaporator completes solvent stripping to below 25 ppm ethanol. The entire evaporation train is nitrogen-padded to prevent thiosulfinate oxidation during concentration.
Standardization
Concentrated garlic oleoresin is analysed by HPLC for allicin content and by GC-FID for total organosulfur profile (DADS, DATS, ajoene). The fixed oil content is determined gravimetrically. Batches are blended to the customer-specified allicin-equivalent level (typically expressed as 1000–3000 ppm allicin potential) and adjusted with food-grade MCT oil for viscosity.
Packing & Storage
Finished garlic oleoresin is filled into food-grade amber glass jars, lacquer-lined tins, or HDPE drums under nitrogen blanketing to prevent allicin oxidation and sulfur compound volatilisation. Containers are stored at 5–10°C in odour-isolated, dedicated garlic cold storage to prevent cross-contamination of other facility products.
Applications
- Food flavouring in processed meats, sauces, dressings, soups, and ready meals for consistent, standardised garlic intensity without variability from whole spice
- Cardiovascular nutraceutical supplements — allicin and DATS are extensively studied for their LDL-cholesterol reduction and blood pressure-lowering properties
- Antimicrobial pharmaceutical preparations leveraging allicin's broad-spectrum antibacterial, antifungal, and antiviral activity
- Functional food ingredient in garlic capsules, tablets, and softgels targeting immune support and cardiovascular health claims
- Animal feed additive to improve gut health, replace antibiotic growth promoters, and reduce pathogenic bacteria load in poultry and swine
- Biopesticide formulations — garlic oleoresin demonstrates effective repellency and ovicidal activity against aphids, whiteflies, and spider mites
- Personal care — garlic-derived allicin incorporated in topical formulations for athlete's foot, nail fungal infections, and antimicrobial skin care
Key Features
Low-Temperature Allicin Capture
Extraction at 20–35°C and evaporation at 40–50°C are specifically designed around allicin's thermal instability (half-life <24 hours at 23°C). Cold-temperature processing maximises allicin capture before it converts to DADS and DATS, giving customers a choice of allicin-rich or organosulfide-rich product profiles.
Explosion-Proof Design
All electrical equipment in ethanol-handling zones is ATEX Zone 1 / IECEx certified. Given the strong odour profile of garlic extractives, the plant is enclosed in a dedicated negative-pressure zone with activated carbon air scrubbing to manage sulfur compound emissions to atmosphere.
Solvent Recovery System
Multi-stage falling-film evaporation with refrigerated condensers achieves over 95% ethanol recovery per batch. A dedicated activated carbon guard bed on the vent line captures residual garlic sulfur volatiles, preventing air emissions and maintaining the solvent recovery system free from organosulfide fouling.
GMP Compliant Construction
All product-contact surfaces are SS 316L with mirror-polish finish. The garlic oleoresin plant is physically isolated from other spice extraction trains to prevent cross-contamination with this intensely odorous material. CIP circuits use dilute citric acid followed by ethanol sanitisation to effectively remove garlic residue between batches.
Multi-Spice Platform
The low-temperature extraction platform is also optimised for processing onion (quercetin, sulfur volatiles) and leek oleoresins, enabling allium-specialist manufacturers to operate a single production line for the full allium oleoresin product range.
Frequently Asked Questions
How is allicin content measured and reported in garlic oleoresin?
Does processing temperature significantly affect allicin content in the final oleoresin?
How is the strong garlic odour managed in the facility during processing?
Can the plant process odourless garlic to produce odourless alliin-standardised extract?
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