Egg residue presents a unique challenge to ADD manufacturers: egg contains a selection of proteins (ovoinhibitors) that inactivate traditional detergent proteases in the washing cycle, diminishing their power to remove protein-containing food soils. Novozymes has recently cracked this problem with the development of a new protease, Ovozyme® 48 T, specifically engineered to resist the ovoinhibitors contained in eggs. Ovozyme 48 T offers unique benefits, including:
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Spotless, shiny tableware every time
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Exceptional performance on egg-containing soils
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High performance, providing more space in the tablet for other ingredients
Overcoming the ovoinhibitors
In nature, the ovoinhibitors contained in egg yolk and white protect the growing chick against attack from proteases released by invading bacteria. The problem is that, because almost all detergent proteases are derived from bacterial species, these ovoinhibitors are similarly effective in inactivating the proteases contained in dish-washing detergents. And this results in reduced cleaning performance not just on the egg residue, but on every protein-containing soil present in the same dishwasher load.
Niels Henrik Sørensen, a research scientist at Novozymes, explained to BioTimes that "Ovozyme 48 T is a novel engineered var-iant of Savinase,® one of our most successful proteases. In creating Ovozyme 48 T, we altered the protein sequence to make it resistant to inactivation by the ovoinhibitors contained in eggs. In short, we have created a very powerful protease for automatic dishwashing."
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Samples of ADD with Ovozyme® 48 T are available from Novozymes for demonstration purposes. |
Putting it to the test
Egg soils have long been a favourite of the independent test institutes due to their stubbornness. Here, commercial ADD formulations are commonly put to the test on tough egg soils such as egg and milk, egg yolk and minced meat. It is precisely on this soil spectrum that traditional proteases fall short of yielding the best results.
Ovozyme 48 T provides a solution. It matches the cleaning performance of conventional proteases in cycles where no egg soiling is present. But in the presence of egg residue, Ovozyme 48 T excels where traditional proteases fail - by delivering a perfectly clean and shiny result every time.
Emmanuel Petiot, Novozymes' regional European marketing manager, told BioTimes: "High performance results from independent test institutes are recognised as a great tool for success in the automatic dishwashing market, especially if the institutes are used by consumer associations. The key benefits of Ovozyme 48 T translate very nicely into important performance-related consumer claims, most notably the ability to deliver shiny tableware whatever the soil load."
Optimised cost performance
Until now, many ADD tablet manufacturers have been unable to take full advantage of the extraordinary cleaning power provided by enzyme ingredients. The problem is that ADD tablet formulations must fit into the small detergent dispenser to ensure that they are only released when the main washing cycle begins. Modern three-in-one ADD tablet formulations already contain pre-dosed detergent, salt and rinse aid, limiting the capacity available for the addition of enzyme ingredients. What is more, there is a growing trend for these tablets to be smaller and smaller.
Emmanuel Petiot told BioTimes: "Multi-ple traditional proteases or very high concentrations of a single traditional protease are required to overcome the ovoinhibitors present in egg-containing soil loads. It would be impossible to accommodate this quantity of enzyme in most ADD tablet formulations. Our newest protease, Ovozyme 48 T, has an exceptionally high performance even when present in small quantities in ever smaller tablets. This not only makes it remarkably cost-effective, but will also enable our ADD tablet manufacturer customers to pack more cleaning power into their tablet formulations within the all-important size constraints ."