Steribeam UVC-Tunnels for 3-4 logs disinfection inside 0.2-2 l Jars at up to 15000 jars per hour
Posted: 22 September 2014 | | No comments yet
Disinfecting inner surfaces of jars on conveyer lines with UVC light at high production rates is the preferred choice of non-invasive (clean) disinfection…
Disinfecting inner surfaces of jars on conveyer lines with UVC light at high production rates is the preferred choice of non-invasive (clean) disinfection. This production step is necessary to assure a safe filling jars with a product and then cupping them. The major challenge here is in delivering UVC light in sufficient doses to jar´s areas between jars opening and its strait walls.
This challenge is positively resolved by our UV optics and is proved in tests for these places in jars as shown on the photo for 1.9l (64Oz) and 048l (16Oz) jars for peanut butter. Arrows show the direction of UVC light from above into jars and positions of UVC sensors to measure UVC doses. Jars were prepared to test custom UVC optics while imitating jars in-line advancements.
The maximum speeds can be reached for simplest cases of disinfecting from common E-coli, Salmonella and Listeria at 3 to 4 logs (99.9% to 99.99% reduction). De-activating common spores requires higher UVC doses up to 80-100 mJ/cm², see Table 2 below. Lids are disinfected while sliding on rails under a UVC module. Respective equipment is possible to construct as custom-made. The exact UVC doses can nbe established during plus disinfection tests at a food lab on customer jars along with a selection of a UVC disinfection process allows to customize UVC tunnels for disinfection of both inner and outer surfaces of jars at speeds up to 15000 J/hr. The design and costs of such tunnels depend on jars size, its rate per hour and disinfection requirements. Higher production speeds and 3 -4 logs deactivation rates for common spores can be also reached with compact PUV tunnels.
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