14 apr 2026
Biological degreaser: what it means and how ozone water compares
The term biological degreaser appears in searches from people looking for a cleaning product that removes grease from hard surfaces without synthetic chemicals. But what makes a degreaser biological? And how does a biological degreaser compare to other alternatives such as ozone water? Those questions are less straightforward than they appear, because the term is used in the market in diverse ways. Some manufacturers use biological as a synonym for plant-based origin. Others refer to the biodegradability of the ingredients. Others still use it as a marketing label for products that are less aggressive than traditional petroleum-based degreasers. All those meanings partly overlap but are not identical. This article explains what a biological degreaser means in practice, what categories exist and how ozone water as a technology fits into the broader landscape of chemical-free and biological cleaning solutions for daily use on hard surfaces in the kitchen and other spaces. Understanding that landscape makes it easier to choose the right approach for each specific cleaning task and environment, based on actual properties rather than marketing terminology. The choice of the right cleaning approach always involves weighing effectiveness, practical usability and personal or professional requirements against each other. This article provides the factual foundation for that choice, without promotional language or unverifiable claims.
Biological degreaser: explanation of the term, the three categories and a factual comparison with ozone water as a residue-free and chemical-free alternative.
Biological degreaser: ask your question
What is a biological degreaser: definition and context
A biological degreaser is a cleaning product that removes grease from hard surfaces without synthetic petroleum chemicals. The term is used in the market in diverse ways and is not legally defined for cleaning products in the EU. Anyone wanting to make an informed choice is well advised to look at the actual properties of a product rather than relying solely on the label.
Three categories under the biological label
In the degreaser market three categories fall under the biological label. The first are plant-based degreasers: made from citrus extracts, coconut derivatives or soy. They work through emulsification — they surround fat molecules so that they can be rinsed away with water. They are mild in character but require rinsing and sometimes leave a slight plant-based smell or film behind.
The second category are biodegradable degreasers. These are degreasers whose ingredients are broken down after use by micro-organisms in the environment. Biodegradability is a property of the substances after use, not of the cleaning action itself. A product can be biodegradable while still containing chemical surfactants that leave temporary residues on the surface.
The third category are certified products with a recognised label such as the EU Ecolabel. Those labels set requirements for ingredients, biodegradability and sometimes also packaging. They offer the most certainty for anyone who wants transparency about the composition of the product.
Ozone water: a separate category
Ozone water falls outside all these categories. It contains no plant-based ingredients and has no biodegradability profile in the classic sense. The ozone reverts directly during use to oxygen and water. There are no ingredients that end up in the environment after use. That property makes ozone water technically a separate category: not a chemical cleaning product, but an activated water solution that cleans through oxidation and then completely returns to the basic components of water and air. The systems from ozonreiniger.com produce ozone water on site via electrolysis. The fresh ozone water is used directly for cleaning via the two-cloth method. No rinsing needed. More about the working principle is on the ozone water explanation page.
Practical comparison: biological degreaser versus ozone water
For the user choosing between a biological degreaser and ozone water, the practical comparison is most relevant. Biological degreasers are ready to use in a bottle, require no equipment and are widely available in supermarkets and drugstores. They are immediately deployable without upfront system costs. Ozone water requires a one-off investment in a device. After that investment, operational costs are low: electricity and water. No cleaning products need to be purchased for daily cleaning tasks. Over the longer term that can be advantageous, depending on intensity of use and the price of replacement products. More about available systems is on the ozone water machines page.
Residues and rinsing: the practical difference
An important practical difference between plant-based degreasers and ozone water is the need for rinsing. Plant-based degreasers contain surfactants that are rinsed away after degreasing. That extra step takes time and water. With ozone water the active substance reverts after the cleaning reaction directly to oxygen and water. There is no film-like residue and no rinsing needed. For surfaces that come into contact with food that is a relevant difference: no residues means no risk of cleaning product residues transferring to food. That property makes ozone water particularly suitable for daily maintenance of kitchen surfaces, worktops, refrigerator exteriors and other surfaces in the direct vicinity of food processing. More about the kitchen application is in the article about the natural degreaser in the kitchen.
How ozone reacts with fat molecules
To understand how ozone water works as a degreaser it is useful to know how ozone reacts with fat molecules. Fats are hydrocarbons — molecules built from carbon and hydrogen, sometimes with an oxygen group. Ozone has a strong tendency to react with carbon-hydrogen bonds. That reaction breaks the fat molecule into smaller, water-soluble fragments. Those fragments loosen from the surface and are absorbed by the microfibre cloth. After the reaction the ozone has been fully consumed: there is no ozone residue on the surface. The reaction proceeds quickly with freshly produced ozone water with sufficient dissolved ozone concentration. A full explanation of the degreasing action is in the article about ozone water as a degreaser.
When a certified biological degreaser is the better choice
There are situations where a certified biological degreaser is preferable. In professional environments where cleaning products must meet specific standards or certification requirements, such as HACCP-certified kitchens or certain healthcare facilities, a certified product is sometimes required. Also for heavy or stubborn grease deposits that have baked on or been present for a long time, a concentrated biological degreaser with a specific dwell time can be more effective than ozone water. Ozone water is strong for daily maintenance and for removing fresh and moderate grease contamination. The chemical-free approach for daily use is further explained in the article about the chemical-free degreaser.
The right choice: a summary
The choice of a degreaser depends on several factors: the nature of the contamination, the environment, residue requirements, logistical preference and desired frequency of use. Biological degreasers are widely available, certified variants offer the most transparency, and they are effective for diverse types of grease contamination. Ozone water is a simpler system for daily maintenance: no ingredients, no residues, no rinsing. Both approaches are not mutually exclusive. A certified biological degreaser for periodic or heavy cleaning, and ozone water for daily maintenance, is a combination that works well in many professional and domestic kitchens. The key is understanding the properties of both options and matching them to the specific situation. The team is available for questions via the contact form. A complete overview is on the guides page.
User experiences
💬 "I always used a biological degreaser in my kitchen, but was looking for something without smell and without rinsing. With ozone water I now have a system I use daily that leaves no residues. The difference in ease of use is significant." — User from Leiden, restaurant owner
Related articles in this series
This article is part of the natural degreaser cluster:
- Natural degreaser — cluster overview page
- Chemical-free degreaser — residue-free cleaning explained
- Natural degreaser kitchen — practical application
Terminology: biological, chemical-free, activated water
The terminology around alternative degreasers can be confusing. Biological, chemical-free, green, eco, natural and residue-free are used by manufacturers and information sources in diverse ways. It is useful to dissect those terms. Biological refers to the origin of ingredients or their biodegradability. Chemical-free strictly means no chemical substances are added to the product — ozone water qualifies because it contains only water and dissolved ozone. Residue-free refers to leaving no residues after use — ozone water leaves no chemical residues.
Those distinctions help to compare products objectively. A plant-based degreaser is biological in origin but not residue-free. A biodegradable degreaser has positive environmental properties after use but may leave residues during use. Ozone water is chemical-free and residue-free but not biological in the classic meaning of the word. All these properties are relevant, and weighing them depends on the priorities of the user and the requirements of the environment.
Daily degreasing: routine and result
Daily degreasing with ozone water is quick and straightforward. After cooking or at the end of the working day, worktops, kitchen surfaces and other greasy surfaces are sprayed with fresh ozone water and wiped down with a microfibre cloth. The total time required is minimal. The result is a clean, odour-free and residue-free surface. Done daily, it prevents grease deposits from building up and becoming harder to remove. That preventive approach is more efficient than periodic intensive cleaning of accumulated grease layers. Explanation of daily use in the kitchen is on the ozone water cleaning page. For questions about specific applications, the team is available via the contact form.
Limits of ozone water for degreasing
Ozone water is not a universal solution for all types of grease contamination. For heavily baked-on grease deposits, carbonised residues or extreme soiling, specific cleaning products or mechanical removal methods may be required. Ozone water is optimal for daily maintenance and the removal of fresh and moderate grease contamination on hard surfaces. That honest characterisation of possibilities and limits is typical of how ozonreiniger.com communicates about its products: transparent about what the product can do, and clear about what it cannot. That honesty builds the trust that is the foundation of a lasting relationship between the product and its user. More information and a complete overview of all articles in the natural degreaser series is available on the ozone water machines page and via the contact form.
Further reading
A complete overview of all articles is on the guides page. The ozone water cleaning page provides practical explanation of daily use on different surface types.