Cleaning in the food industry: methods, detergents and equipment for safe production
In the food industry, the cleanliness of equipment and surfaces is not only a legal obligation, but also a decisive factor for consumer safety and product quality.
Every manufacturing process, from a dairy plant to an industrial frying line to a brewery, generates waste that must be disposed of with specific protocols.
Insufficient cleaning leads to cross-contamination, The right strategy ensures operational efficiency, longer equipment life and regulatory compliance.
Table of contents
Cleaning challenges in food processing
The waste generated in production varies according to the type of feed.
In the dairy sector, for example, there is the so-called milk stone, a scale of salts and proteins that adheres strongly to surfaces and requires mild acidic products to be removed without damaging equipment.
In industrial frying, the grease and carbon deposits affect both the taste and the stability of the oils, increasing costs and reducing the quality of the final product.
Breweries and wineries are faced with the accumulation of sugars, yeasts and cereal residues, which require alkaline and enzymatic solutions capable of dissolving organic matter without damaging the fermentation tanks and glassware.
In meat and poultry processing plants, the challenge lies in the removal of raw blood and protein, which can only be effectively removed with alkaline enzymatic detergents formulated to respect stainless steel and food grade plastics.
Even industries working with membrane filtration, such as decaffeinated coffee or juice production, require neutral or near-neutral detergents to remove biofilms without damaging sensitive materials.
Cleaning methods in the food industry
The choice of cleaning method depends on the type of installation, the volume of production and the nature of the waste.
Manual cleaning is still used on easily accessible surfaces, but is limited by its dependence on the operator and the time required.
The ultrasonic cleaning systems have proven highly effective on complex parts or removable components, as cavitation reaches hard-to-reach areas and removes debris invisible to the naked eye.
In large-scale installations, CIP (Clean in Place) systems have become the most widespread solution. This type of technology makes it possible to clean pipes, tanks and equipment without dismantling them, by means of programmed cycles that include rinsing, detergent and final disinfection.
In a complementary way, the automatic washing machines or pressure jetting systems are used for surfaces exposed to grease and oil that require a more intensive mechanical action.
Summary of cleaning methods:
🔹 Manual cleaningfor use on easily accessible surfaces such as benches or counters, using immersion detergents.
🔹 Ultrasoundhighly effective for complex parts and components, where cavitation removes debris in difficult areas.
🔹 CIP systems (Clean in Place)widely used in industrial plants, they allow cleaning of pipes, tanks and equipment without dismantling.
🔹 Automatic washing machines or pressure washersIdeal for large volumes or surfaces exposed to grease and oil.
Selection of suitable detergents
Detergent is at the heart of any cleaning protocol in the food industry.
In most processes the following are recommended mild alkaline cleaners, The water is able to remove fats, oils and sugars without generating excessive foam.
For the meat and dairy plants, the alkaline enzymatic detergents are the most effective, as they act on proteins and raw blood very effectively, without compromising the durability of the materials.
In cases where mineral encrustations are present, as is the case in dairy equipment, the following are used mild acid detergents which dissolve the milk stone without damaging the stainless steel.
For industries using filtration membranes, the safest option are neutral or very close to neutral pH detergents, This avoids the deterioration of sensitive materials.
In all cases, the choice of product must consider not only efficacy on the residue, but also compatibility with equipment materials and ease of rinsing to ensure that no chemical traces are left in contact with food.
Some key recommendations:
🔹 Mild alkalisrecommended for oils, fats and sugars.
🔹 Alkaline enzymesEffective in meat and dairy plants, they remove blood, proteins and biofilms without damaging sensitive materials.
🔹 Low foaming mild acidsIdeal against encrustations of minerals, oxides, salts or milkstone.
🔹 Neutral pH detergentsrecommended for delicate filtration membranes used in juice, decaffeinated coffee or cheese production.
Practical applications by sector
Each sector of the food industry applies specific protocols.
In dairy production, cycles often alternate alkaline and acidic detergents to ensure the removal of both fat and mineral deposits.
In industrial frying, the key is to keep fryers and oil tanks clean with mild alkaline solutions that dissolve grease and carbonised residues.
Breweries and wineries prioritise the cleaning of fermenters, pipes and glassware with detergents that respect the desired microbiology of the product, avoiding cross-contamination.
In meat and poultry plants, programmes focus on rapid removal of organic matter to prevent bacterial growth, using specific enzymatic detergents and high quality water rinses.
Case studies by sector
🔹 DairyA mild acidic cleaner is recommended to remove the milkstone and avoid ceramic encrustations.
🔹 Industrial fryingMild alkaline liquid detergents that remove adhering carbon and greasy residues without the risks of aggressive caustics.
🔹 Alcoholic beverages: cleaning with mild alkalis and enzymes, preserving purity in fermenters, tanks and glassware.
🔹 Meat and poultryalkaline enzymatic detergents that remove proteins and raw blood, protecting stainless steel surfaces.
🔹 Filtration membranesNeutral or near-neutral products are required to remove biofilms without damaging sensitive materials.
Benefits of effective cleaning
Well-implemented cleaning has a direct impact on food safety and consumer confidence.
Clean equipment reduces the likelihood of contamination, ensures that the final product maintains its organoleptic characteristics and avoids costly market withdrawals..
At the operational level, reduces production downtime, extends machine life and reduces the need for corrective maintenance.
In addition, a proper cleaning strategy ensures compliance with current health and safety regulations, which protects companies from sanctions and legal problems.