Common And Unexpected Uses For Olive Oil Pomace
- 01. Oil byproduct with purpose: what olive oil pomace is used for
- 02. What olive oil pomace actually is
- 03. Main uses of olive oil pomace in industry
- 04. Refined olive pomace oil in cooking
- 05. Animal feed and soil amendments
- 06. Energy, biofuels, and bioplastics
- 07. Cosmetics, soaps, and personal-care products
- 08. Scientific and environmental context
- 09. Key applications and typical uses at a glance
Oil byproduct with purpose: what olive oil pomace is used for
Olive oil pomace is the solid residue left after the first extraction of virgin or extra-virgin olive oil, consisting of skins, pulp, fruit fragments, and small amounts of residual oil. This material is now widely repurposed into several high-value products, including refined olive pomace oil for cooking, animal feed and organic fertilizer, and even biofuels and cosmetics.
What olive oil pomace actually is
Olive oil pomace is produced after olives are crushed and the main oil is separated via pressing or centrifugation, leaving behind a wet, fibrous mash often called "alperujo" in Mediterranean mills. Modern plants typically separate stones from the pulp, producing "stoned olive pomace," which is easier to dry and handle for downstream uses.
Despite being a byproduct, pomace retains significant value: it contains residual oil (roughly 3-8 percent by weight in dried pomace), proteins, fibers, and bioactive compounds such as polyphenols, tocopherols, and pigments. These components make it more than just agricultural waste; they underpin its use in food-adjacent, nutritional, and industrial applications.
Main uses of olive oil pomace in industry
The most common industrial pathway for olive oil pomace is secondary oil extraction, producing olive pomace oil-a refined vegetable oil approved for human consumption under EU and Codex Alimentarius standards. This oil is typically solvent-extracted from the dried pomace, then refined, bleached, and sometimes heat-treated to remove odors and colors, yielding a neutral-tasting oil suitable for high-heat cooking.
Large olive mills in Spain and Italy, which together process over 70 percent of the EU's olives, have increasingly integrated pomace-oil lines to improve circularity and reduce waste. A 2026 University of Córdoba study estimated that roughly 60-70 percent of pomace generated in modern EU mills is now processed for olive pomace oil, with the remainder diverted to compost, energy, or feed.
Refined olive pomace oil in cooking
Refined olive pomace oil is widely used in commercial kitchens, fast-food chains, and food-service operations because of its high smoke point and cost efficiency. Thermal stability tests commonly place its smoke point around 460°F (238°C), which is higher than many extra-virgin olive oils and comparable to several refined vegetable oils.
In practice, olive pomace oil appears in:
- frying and deep-frying operations for pizza bases, battered fish, and frozen snacks, where its neutral flavor and resistance to oxidation help maintain consistent taste and color over many hours of frying.
- oven roasting and grilling of meats and vegetables, where the oil's stability reduces the formation of off-flavors and visible smoke at high temperatures.
- baking and confectionery, where it substitutes partly or fully for butter or other vegetable oils in products such as focaccia, biscotti, and hummus-based spreads.
For home cooks, olive pomace oil is often positioned as a lower-cost alternative to extra-virgin olive oil for high-heat methods, though it is generally not recommended as a premium finishing oil due to its milder aroma and flavor.
Animal feed and soil amendments
Dried stoned olive pomace has long been used as a feed supplement, particularly in Mediterranean livestock systems where it is mixed with barley, corn, or other grains. Research on dairy buffaloes and sheep in southern Italy and Spain has shown that including 10-15 percent dried stoned olive pomace (DSOP) in rations can increase milk concentrations of tocopherols and retinol without markedly altering yield or fat content.
Poultry and ruminant trials conducted between 2019 and 2023 indicated that DSOP inclusion can improve feed efficiency and digestibility, likely due to its fiber and residual lipid content, but also highlighted the need to limit inclusion levels to avoid antinutritional effects from polyphenols and salts. Across these studies, typical "safe" inclusion levels ranged from 5-12 percent of dry matter depending on species and stage of production.
When not used for feed, olive pomace is often composted into organic fertilizer or applied directly as soil amendment in orchards and vineyards. Composting stabilizes the material, reduces salt content, and converts labile organic matter into humus that can improve soil structure and water retention in Mediterranean-type soils.
Energy, biofuels, and bioplastics
Because olive pomace contains residual oil, lignocellulosic fibers, and fermentable sugars, it is increasingly attractive as a feedstock for renewable energy and biobased materials. In many olive-producing regions, mills already burn dried pomace in biomass boilers to generate heat and electricity for the factory, reducing reliance on fossil fuels and cutting operational costs.
Emerging routes include gasification and anaerobic digestion processes, which convert pomace into syngas, biogas, or biochar-a carbon-rich solid that can be added to soil to improve cation-exchange capacity and sequester carbon. A 2026 sustainability assessment of these pathways estimated that pomace-based gasification could offset up to 1.2-1.8 tons of CO₂ equivalent per ton of pomace, depending on system efficiency and local energy mix.
Researchers are also exploring pomace-derived platform molecules for bioplastics and biopolymers by extracting sugars and lignins and transforming them into biodegradable films and packaging materials. These technologies are still largely at pilot scale, but early lifecycle analyses suggest that integrating pomace valorization into the broader circular economy of the olive-oil sector can significantly lower net greenhouse-gas emissions per ton of finished oil.
Cosmetics, soaps, and personal-care products
Refined olive pomace oil is valued in cosmetics for its stability, emollient properties, and naturally occurring vitamin E and vitamin A derivatives. Manufacturers often use it as a base or carrier oil in lotions, creams, and hair conditioners, where it helps soften skin and reduce transepidermal water loss without leaving a heavy greasy feel.
In soap-making, pomace oil is blended with other vegetable oils to create mild, creamy olive oil soaps that saponify readily and produce a stable lather. Its cleansing and moisturizing balance makes it suitable for sensitive-skin formulations, and its natural antioxidants can slow product rancidity, extending shelf life in emulsions and balms.
Extracts from the solid olive pomace itself-rich in polyphenols such as hydroxytyrosol and oleuropein-are also being incorporated into anti-aging serums, toners, and masks. These polyphenols are believed to exert antioxidant and anti-inflammatory effects on skin cells, though most supporting data currently come from in-vitro and small-scale clinical studies rather than large-scale randomized trials.
Scientific and environmental context
The European olive-oil sector generates an estimated 10-15 million metric tons of wet pomace annually, a volume that has driven decades of research into effective valorization strategies. Until the 1990s, much of this material was simply landspread or stored, creating odor, runoff, and salinization issues; stricter EU environmental regulations in the 2000s pushed the industry toward more engineered recovery systems.
A 2026 composite sustainability analysis by the University of Córdoba evaluated three main pomace-management routes: extraction of olive pomace oil, composting for fertilizer, and gasification for energy. Across economic, environmental, and social indicators, the study concluded that extraction of olive pomace oil currently ranks as the most sustainable option, because it simultaneously generates saleable oil, residual biomass for energy, and reduced environmental liability.
From a resource-efficiency perspective, integrating pomace recovery into mill operations can increase the overall oil yield from a given ton of olives by roughly 10-15 percent, significantly improving the resource-use efficiency of the olive-oil supply chain. This has encouraged broader adoption of "zero-waste" mill designs in Spain, Italy, and Portugal, where new facilities are increasingly required to demonstrate closed-loop pomace handling before they receive permits.
Key applications and typical uses at a glance
Table 1 below summarizes the main applications of olive oil pomace and its derived products, along with indicative usage contexts and approximate scales where available.
| Product or pathway | Primary use context | Typical scale or inclusion level |
|---|---|---|
| Refined olive pomace oil (for cooking) | Food industry frying, restaurant kitchens, domestic high-heat cooking | Often used at 100% in fryers or blended with other oils; retail share in EU olive-oil categories ≈ 15-20% by volume in countries like Spain and Portugal |
| Dried stoned olive pomace for animal feed | Dairy buffaloes, sheep, and some cattle rations | Commonly 5-12% of dry matter in experimental and commercial diets; higher levels may reduce palatability or digestibility |
| Composted pomace as organic fertilizer | Olive groves, vineyards, and arable fields | Variable; often 5-20 tons per hectare per application, depending on soil type and salinity |
| Biomass combustion / gasification | On-site mill energy generation, grid-connected biomass plants | Pomace can supply 30-60% of a mill's thermal energy needs when fully valorized |
| Pomace-based cosmetics and extracts | Skin and hair care, soap-making, aromatherapy carrier oils | Typical raw-material inclusion in emulsions: 3-10% pomace-derived oil; extracts used at lower percentages |
Expert answers to Common And Unexpected Uses For Olive Oil Pomace queries
What is olive oil pomace exactly?
Olive oil pomace is the solid residue left after the initial mechanical extraction of virgin or extra-virgin olive oil, composed mainly of skins, pulp, crushed pits, and small amounts of residual oil and water. Modern mills typically separate stones and dry the pomace before further processing, which determines whether it is used for secondary oil extraction, animal feed, composting, or energy.
Is olive pomace oil safe to eat?
Refined olive pomace oil is considered safe for human consumption in the EU, the United States, and other major markets when it meets regulatory purity and labeling standards. It must be labeled as "olive pomace oil" and is often blended with a small amount of virgin olive oil to reintroduce some flavor and antioxidants; health authorities generally treat it similarly to other refined vegetable oils in dietary guidelines.
Can olive oil pomace be composted?
Yes, olive oil pomace can be composted into organic fertilizer, although it often requires pretreatment (such as drying, stone removal, and mixing with bulking agents) to reduce salinity and accelerate decomposition. Properly composted pomace can improve soil organic matter and structure, but mills must manage moisture and salt content carefully to avoid harming plants or leaching into groundwater.
Is olive pomace oil the same as extra-virgin olive oil?
No; refined olive pomace oil is not the same as extra-virgin olive oil in production method, flavor, or nutritional profile. Extra-virgin oil is mechanically extracted from fresh olives without heat or solvents, preserving delicate aromas and higher levels of certain polyphenols, while pomace oil is solvent-extracted from residual solids and refined, yielding a more neutral, higher-smoke-point oil at lower cost.
What are the environmental benefits of using olive oil pomace?
Using olive oil pomace in extraction, feed, composting, or energy production reduces the volume of waste that must be landfilled or stored, cutting odor, runoff, and methane emissions from decomposition. Studies suggest that integrated pomace valorization can cut the carbon footprint per ton of olive oil by 10-20 percent and improve the overall circular economy performance of the sector.
What percentage of olive oil pomace is turned into edible oil?
Data from EU olive-milling regions in 2025-2026 indicate that roughly 60-70 percent of pomace is processed for olive pomace oil, while the remaining 30-40 percent is typically directed to compost, energy, or animal feed, depending on local regulations and infrastructure. This share has increased over the past decade as mills have upgraded to more integrated recovery systems and as markets for refined pomace oil have expanded in food-service and industrial cooking.