Hygienic design and the hidden cost of cleaning in modern production

A production line stops. Cleaning teams move in, hoses and detergents ready. Conveyor frames are sprayed down, belts removed, panels opened and surfaces scrubbed. Once sanitation is complete, the line can finally start again. For most manufacturers this routine is so familiar that it rarely attracts attention. Cleaning is simply part of the process.

Yet the design of the equipment being cleaned often determines how long that process takes, how much water and energy it consumes and how reliably hygiene standards can be maintained. The way machinery is engineered therefore influences far more than regulatory compliance. It also shapes the efficiency of everyday operations.

Across all manufacturing sectors, companies are under pressure to reduce costs, minimise downtime and operate more sustainably. Hygienic design sits directly within this challenge. Equipment that supports efficient sanitation allows cleaning to be completed more quickly and consistently, helping production lines return to operation sooner.

Where microorganisms find their opportunity

Food production environments often provide conditions that microorganisms find favourable. Warm temperatures, moisture and organic residues can all support microbial growth. During production, small amounts of product may remain on equipment surfaces, particularly in areas where residues are difficult to remove completely. If moisture remains after cleaning, these locations can allow microorganisms to survive and establish themselves within the production environment.

Once bacteria become established, they may spread through the process, increasing the risk of contamination and potentially compromising product safety. Preventing these microbial harbourage points is therefore a central challenge in hygienic manufacturing.

The operational challenge of cleaning

To control contamination risks, manufacturers rely on regular sanitation procedures. However, cleaning is also a period when production stops. In many facilities sanitation routines take longer than necessary because equipment was not designed with cleaning in mind. Complex assemblies, difficult-to-reach surfaces and components that must be dismantled before washing can all extend the cleaning process.

Where production lines run multiple products or frequent changeovers, these delays quickly accumulate. Every additional step during sanitation extends the period when the line is idle, reducing available production time.

Over weeks and months these interruptions translate into lower line efficiency, increased labour requirements and higher operating costs.

Sanitation approaches in modern production

Production facilities use a range of sanitation approaches depending on the product and manufacturing process. Some systems rely on Clean in Place procedures where cleaning solutions circulate automatically through enclosed equipment. Others require Cleaning Out of Place methods, where components are removed and washed separately before being reassembled. In many environments manual sanitation also remains an important part of routine cleaning.

Regardless of the method used, sanitation procedures must be consistent, repeatable and capable of removing residues effectively. This is essential not only for maintaining hygiene standards but also for meeting regulatory requirements such as Good Manufacturing Practice (GMP) as well as programmes based on Hazard Analysis and Critical Control Points (HACCP) principles and Global Food Safety Initiative (GFSI) benchmarked standards. However, when equipment design complicates cleaning procedures, sanitation cycles often become longer and more resource intensive.

Designing equipment for effective sanitation

Hygienic design addresses these challenges by removing the structural features that make cleaning difficult. Effective engineering focuses on simplifying sanitation and maintenance tasks. Smooth, rounded surfaces reduce areas where residues can accumulate, while unnecessary seams, fasteners and complex assemblies are minimised wherever possible. Materials must also withstand demanding sanitation conditions, including repeated exposure to high pressure cleaning, elevated temperatures and aggressive detergents.

Structural geometry plays an important role as well. Equipment should allow effective drainage so that water does not collect. Where components join together, they should be welded or sealed appropriately to maintain hygienic integrity even when temperature variations occur.

When these principles are applied consistently, equipment becomes easier to clean, maintain and operate, allowing sanitation procedures to be completed more efficiently while supporting reliable hygiene control.

Hygienic design in practice

The importance of hygienic design becomes particularly clear when looking at equipment installed at Critical Control Points (CCPs) within the production line. Product inspection technologies such as checkweighers, metal detection systems and x-ray inspection are often positioned directly within the product path or at transitions between hygiene zones. At these stages contamination risks must be carefully controlled in order to help protect product safety.

Because of this positioning, inspection equipment operates in some of the most sensitive areas of the production environment. If hygiene standards are not maintained at these points, contamination may move further along the line before it is detected.

For this reason, the hygienic performance of inspection equipment is just as important as its detection capabilities. Surfaces must be accessible for sanitation, structures should allow effective drainage and components must withstand frequent cleaning procedures.

When these design principles are applied effectively, product inspection systems can be cleaned as easily as the surrounding production equipment. Cleaning teams can therefore treat them as an integrated part of the line rather than as complex machinery that requires special handling.

Looking beyond washdown ratings

Not all equipment marketed as washdown ready delivers the same hygienic performance. Many systems advertise ingress protection ratings such as IP65 or IP66, indicating resistance to dust and high-pressure water jets.

While these ratings confirm durability during cleaning, they do not necessarily indicate how easily a machine can be sanitised. When evaluating equipment, manufacturers should therefore look beyond the rating itself and consider how the design supports real sanitation procedures. Questions worth asking include whether the system can be cleaned quickly and thoroughly, whether components are accessible without tools and whether the design supports existing cleaning protocols rather than simply surviving them. When hygiene is built into equipment from the beginning rather than added later, the benefits extend throughout the production process.

When hygiene failures reach the headlines

Occasionally the importance of hygienic design becomes visible on a much larger scale. Food safety incidents have repeatedly demonstrated how weaknesses in processing environments can lead to serious consequences.

In 2008 and 2009, a large outbreak of Salmonella Typhimurium linked to peanut products in the United States resulted in more than seven hundred confirmed illnesses across 46 states. Investigators traced the source to contaminated peanut butter and peanut paste, triggering one of the largest product recalls in U.S. food industry history.

Another widely reported incident occurred in 2011 when cantaloupes grown in Colorado were linked to a Listeria outbreak. The outbreak spread across multiple states and ultimately resulted in more than 140 infections and over 30 deaths, making it one of the deadliest foodborne outbreaks recorded in the United States.

More recently, a 2025 investigation connected a Listeria monocytogenes outbreak to frozen supplemental shakes. The United States Food and Drug Administration reported that the outbreak strain had been detected within the manufacturing facility itself, showing how contamination can originate within the production environment rather than the raw ingredients alone. This reinforces the importance of equipment designed to support effective sanitation.

Hygienic design as a long term investment

Hygienic engineering is sometimes viewed as an additional cost when equipment is purchased. In reality it should be considered a long term operational investment.

Every extra minute spent cleaning, every damaged component and every unexpected repair contributes to the overall cost of ownership. Over time these operational costs often exceed the initial purchase price of the equipment itself.

Well-designed systems help reduce these hidden expenses. They lower water and chemical consumption, minimise wear on components and shorten changeover times between products. They also reduce the risk of cross contamination when production lines switch between different SKUs.

Product inspection technologies illustrate how relatively small design decisions can create meaningful operational benefits. Checkweighers with open stainless-steel frames allow faster washdowns. Metal detection and x-ray inspection systems with sloped surfaces reduce the likelihood of water pooling. Conveyor belts designed for tool free removal simplify maintenance and sanitation routines. Individually these features may appear minor, but together they can significantly improve overall production efficiency.

Every sanitation cycle pauses production while cleaning teams prepare the line for the next run. How long that process takes is rarely determined by cleaning procedures alone. The design of the equipment being cleaned plays an equally important role.

Machines that are easier to access, dismantle and drain allow sanitation routines to be completed faster and with fewer resources. When hygienic design is considered from the outset, cleaning becomes more predictable and the line returns to production sooner.