We’ve been pasteurising and sterilising for ages. Why renew these guidelines now?

Bengt Eliasson: “Pasteurisation and sterilisation are well established, most widespread and important methods to preserve liquid food. This is why the initial guidelines for continuous pasteurisation and sterilisation were the very first guidelines that EHEDG published to optimise food safety in the food industry. That was back in 1992. Since then, new technologies and new legal requirements and regulations have emerged. EHEDG translates all those new developments into practical guidelines that the food industry and its suppliers can work with to comply with all requirements. EHEDG also wants to help its community members to find the information they need more efficiently. Therefore, all EHEDG working groups recently agreed to structure their guidelines in a new format. So now the guidelines for the pasteurisation and sterilisation of liquid food are published in this new, more user-friendly format.”

So what’s new?

“These new guidelines contain hands-on information aimed at food producers, machine equipment developers and plant designers who need to comply with the latest food hygiene regulations. The old versions of these guidelines focused primarily on milk production, thus limiting the possible applications of these guidelines. The renewed guidelines also cover the production of other liquid foods and high acid products like fruit juices. They provide practical technical frameworks that include a wide array of topics ranging from general considerations regarding the applied pasteurisation and sterilisation techniques to hygienic process design and technical matters concerning effective flow diversion, recirculation and cleaning and control processes. All information is presented in line with the new EHEDG guidelines format that structures information into categories like design, production and maintenance aspects. For those who want to go one step further, these guidelines also contain useful information on techniques to optimise energy efficiency and minimise maintenance intervals.

Do these renewed guidelines cover everything we must know?

“There’s always more to know, but these publications are very comprehensive. They contain guidelines that help readers to make sure that correct temperatures and processing conditions are maintained, that any unacceptable deviation in key process variables results in an automatic flow diversion or shutdown and that the production process is stopped before fouling becomes significant or before thermophilic bacteria growth becomes too intensive. The guidelines relate to the importance of hygienic design in the different stages of the pasteurisation and sterilisation processes. The guideline on pasteurisation, for example, states that the process equipment downstream of the holding tube must be hygienically designed and hence cleanable, possible to disinfect and bacteria tight. This guideline furthermore offers means to prevent the risk of mixing pasteurised and unpasteurised products. Moreover, both of these guidelines even include practical guidelines on how to utilise hygienic design principles to tackle specific regional legislation requirements.”

You mentioned energy efficiency. How sustainable is hygienic design?

“Energy efficient solutions in general, and heat recovery techniques in particular, are becoming more and more important for food producers. They are willing to invest in new techniques to optimise efficiency - not only to save energy, water, and chemicals but also to maximise their productivity by minimising cleaning time intervals and waste. Hygienic design offers many possibilities to save energy and minimise downtime. These guidelines contain several chapters that help EHEDG community members to make sustainable choices to minimise contamination risks and to save energy and money. The guidelines illustrate that investing in hygienic design solutions is economically viable. By applying hygienic design we can shorten CIP times, make the production more efficient by overall increasing availability and reduce the total cost of production. Since investing in hygienic design improves overall efficiency, it’s is a cost saving investment it. It also avoids recalls and public health hazards.”

Is there a link between hygienic design and new forms of energy re-use?

“The guidelines also illustrate how certain systems work, for example, a system that enables producers to preheat their products by heat recovery using a secondary circuit. Heat recovery systems are in general more complex regarding plant design, but the results are very satisfying because they require significantly less energy. Even when investment budgets are limited, these guidelines offer interesting options. In sterilisation processes, for example, it’s also possible to preheat a product after the holding section with a sterilised product in a regenerative heat exchanger, making for less complex plant designs and realising the same amount of energy savings.”

So it’s not the germs we need worry about then - it’s our inner terrain.

“Exactly. And let me conclude with yet another quote of the great Louis Pasteur, who not only discovered the power of pasteurisation, but who also had a very clear vision on how to handle food safety in general: ‘Whether our efforts are, or not, favoured by life, let us be able to say, when we come near to the great goal, I have done what I could.’"

Improving online presence of EHEDG

On the plenary meeting of the EHEDG World Congress, the EHEDG Sub-Committee Communications illustrated how each member has the power to make EHEDG well known around the world and on all levels of food processing companies. 

6 easy steps  to a higher social media exposure for EHEDG 

Step 1: Go to your LinkedIn account and type in the upper left search window: EHEDG

Step 2: Or go directly to: www.linkedin.com/company/ehedg/

Step 3: The EHEDG LinkeIn Company Page will show up. Click on the button 'Follow'.

Step 4: From now on you will receive all of the EHEDG social media updates in your timeline.

Step 5: If you like a post, show others that you like it by clicking on the 'like' button.

Step 6: Even better: share the post or post a comment. This will multiply the reach of the post.

For more insights on the new communication strategy of EHEDG, please read the interview with the chairman of the EHEDG Sub-Committee Communication Karl-Heinz Bahr in EHEDG Connects Magazine. 

On behalf of the EHEDG Sub-Com Communication and global food safety: THANK YOU!