Environmental Monitoring to Ensure Safety and Compliance

 

Your manufacturing environment always defines the safety and quality of your products, especially in industries that directly impact our everyday lives, like food manufacturing and pharmaceuticals. Therefore, having an Environmental Monitoring Programme (EMP) has become a must for such manufacturing areas. So, let's go through an overview of environmental monitoring.

 Why do we need to have an Environmental Monitoring Programme (EMP)?

👉 To ensure the safety and quality of the product

👉To identify the potential risks and optimize the process

👉As a verification of existing controls, such as cleaning and sanitation programmes

👉To maintain compliance with regulations

When it comes to microbiology, EMP is key to protecting the product from microbial contaminants that may enter from the surroundings. Now, let's have a look at each component of EMP.

Surfaces Monitoring

Sterile pre-moistened swab samples are used in this method. First, the testing area should be selected according to the standard measurements. After wiping the selected area, the swabs are ready to be tested in the laboratory, where enumeration techniques are used to determine the number of microbes present in that location. 

A swab sample can be used to check different parameters according to your requirement; however, in most cases, we test the counts of organisms belonging to the Enterobacteriaceae group, including coliforms, E. coli, Salmonella sp., and Listeria sp.

When interpreting the results, we have to have a pre-defined acceptance limit for each location, which we build based on risk zone categorization. A prime example is that the acceptance limit for microbial counts on a food-contact surface is lower than that for the outer part of the same machine. 

Finally, we can come to a conclusion about the microbial safety of our product by considering all these factors. 

Air Quality Monitoring

Air acts as one of the major sources of contamination in a manufacturing environment. Although capturing microbes in the air is a complicated process, two methods are widely used in air quality monitoring: active microbial air monitoring and passive microbial air monitoring. The air samplers are used in active monitoring, while the sediment/settle plate method is used in passive monitoring. 

Here, we use a standard time period to perform the test, and a pre-solidified culture medium is used to facilitate the growth of microbes present in the air.  Then the samples are incubated in optimal growth conditions.

Air monitoring is usually conducted to get an idea of the total microbial count and yeast and mould counts. The final results are calculated by taking the exposure time and growth area into account. Then, it can be interpreted by comparing with our limits as discussed before.

Personal Hygiene Monitoring

The hands of people who work in the production process may introduce microbes to the product because they are involved in all activities from start to end. Therefore, maintaining good hygiene is mandatory, and regular monitoring will verify the hygiene status. 

Swab test and contact plate methods can be used for this purpose. Moreover, promoting good practices in your working area will minimize safety risks while improving personal hygiene.