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| Evaluating heat processing in the lab: innovative system offers direct and indirect heat - Ingredient Technology Today's dairy foods manufacturers want it all when it comes to rolling out new products: Long shell life, great flavor, inexpensive ingredients and simple process. In order to identify the means to achieve these goals, or at least get fairly close, it is helpful to have a pilot plant equipped to measure all the possible processing variables in order to evaluate ingredients. continued below... |
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"We were not quite sure if we could develop a laboratory system capable of heating by both direct steam injection and indirect in a heat exchanger, but we knew there definitely was a need for such a system," says David Miles, ., MicroThermics Inc., Raleigh, . "Nevertheless, when we put our minds to it, as the saying goes, where there is a will, there is a way. And, in fact, we did design the first Direct/Indirect Processor (DIP) earlier this year, and have been making more ever since."
The DIP system combines direct and indirect heat processing with vacuum cooling into one machine. The capabilities of this system include HTST and UHT pasteurization, along with aseptic and ESL (extended shelflife) processing. The system can process a variety of liquid and viscous products including milk, flavored dairy drinks, nutritional supplements, ice cream mix, juice concentrates, fruits juices and drinks, tea, coffee, pudding, cheese sauce and more.
"With the DIP laboratory system, product developers and process engineers can evaluate the effects of both direct and indirect heating on product quality and fouling," says Miles.
Bill Shazer, dir. of laboratory, Continental Custom Ingredients (CCI), West Chicago, Ill., says, "We purchased a DIP laboratory system in order to offer our customers all processing options when assisting them with product development. We want to be able to simulate any process our customers come to us with. We can with the DIP system. This has made CCI more valuable to its dairy clientele."
Prior to acquiring the DIP system, CCI only had indirect UHT processing capabilities in house. Whenever they needed to evaluate product with direct heat, it was necessary to schedule time at an equipment supplier's lab. "This cost money, took time and prevented us from turning samples around quickly for our customers," says Shazer. "With the DIP system, we turn samples around within a week.
"We no longer need to schedule production runs," he continues. "The DIP system operates daily and has a very quick clean up of about an hour, as opposed to our old indirect system that took three to four hours."
The DIP system uses two styles of heating (direct and indirect), two variable-speed product pumps, a uniquely designed central connection panel and a hold-tube bank to provide unparalleled flexibility.
"It's also very nice and compact," concludes Shazer. At 70 inches long, the DIP laboratory system can be rolled through a standard doorway.
"What's really great is that the DIP system works smoothly with any of our other options including electric steam generators, in-line homogenization and ultra-clean filling," concludes Miles.
MicroThermics Inc. 919/878-8045 Write in 400 .com