Food & Drink Process & Packaging Issue 10 2016 - Page 22

Brewery Bottling Machine Biofilm Control On-line monitoring to detect biofilm formation on a bottling machine reduces the risk of product contamination and increases filling capacity of the bottling machine The Situation In the brewing and beverage industry, the potential build-up of biofilm on air-exposed surfaces of bottling units creates a high risk of product contamination. Wet surfaces, splashing product and air-borne micro-organisms promote biofilm build-up where product-spoiling or pathogenic micro-organisms can develop. Aerosols and splashes resulting from the high speed motion of bottles that are filled but still open, can transfer biofilm from the surfaces of the filling machine to the product. Several probes were installed at This risk is routinely managed different locations on the bottling by employing excessive cleaning machine (Figure 1) providing a measures and in many cases biocide continuous, on-line signal that overdosing on a time-based schedule. corresponded to the actual biofilm Condition based cleaning (CBC) as a cost reducing alternative to time based cleaning formation rate on the surfaces and level of contamination risk. The signal was used to initiate a cleaning regime when the biofilm level reached CBC was implemented in a brewery a pre-defined limit replacing the using ONVIDA’s onvi-CONTROL rinsing at regular intervals. In this way monitoring devices for on-line unnecessary time-based cleaning measurement of biofilm formation on measures were avoided and the filler a bottling machine. surfaces were cleaned only when necessary. Figure 1 onvi-CONTROL probe in the area of filler out-feed Figure 2 shows the signal from two probes and the pre-defined critical control level of biofilm atta