This Clever Egg Washer Could Save 90 Million Chickens a Year
Regardless of which came first,
When an egg exits the hen, it's coated with a waxy protective cuticle. This coating prevents bacterial infections for the first week or so (the most critical time for an embryo) by clogging the shell's pores. The coating later wears off to facilitate gas exchange, allowing the developing chick to breathe. But in industrialized chicken propagation, newly laid eggs are often bathed in a hot (110-120 degree F) detergent wash that strips this coating, leaving the embryo exposed to all sorts of infection. Seriously, you ever see inside an industrial hen house? It's filthy. Even getting eggs wet after washing is enough to significantly increase the number of bad eggs.
So rather than scrub off the cuticle along with the bacteria, Dr. Craig Coufal, a poultry specialist with Texas A&M AgriLife Extension Service, and his team created an egg sanitizer that does away with the detergent altogether. Instead, Coufal's washer relies on hydrogen peroxide and UV light to clean them. Eggs are first doused in a fine mist of hydrogen peroxide, then exposed to the UV light. The hydrogen peroxide interacts with the UV rays to generate hydroxyl ions, which kill germs without disintegrating the cuticle.
Early lab tests are extremely promising, with zero chemical residue, no change to the yolk's texture or taste (as 120 degree detergent baths are wont to do), and low secondary infection rates, thanks to the intact cuticle. The machine is still in the prototype stage but Coufal's team is working to install a pilot machine in a local hatchery in the coming months. [ Texas Bionews ]