Titrations to determine bottle wash detergent or peracetic acid concentration can be complicated and some involve at least three reagents. However, new drop-test kits and test strips are available that make the whole process much easier.
Using ozonation as a final terminal disinfection in bottle washing can be effective, but only if used at the correct concentration. 0.4mg/l is not sufficient and concentrations of 0.8mg/l are required for effective disinfection. 0.4mg/l will disinfect the rinse water, but not the bottle surfaces.
Only certain treatments are allowed for natural mineral water and spring water. Natural mineral water ideally should receive no treatment at all. Make sure that your labelling complies with the regulations.
Reducing greening of bottles is possible by correct choice of bottle wash detergent. The best option is to use a detergent containing a disinfectant component and wash at temperatures above 60°C. Alternatively, pre-washing equipment and chemicals are available to handle this problem.
Is your Colilert® test working? Some conditions can give false positives.
Hydrogen peroxide disinfectants are ideal for use in the bottling plant and for cooler servicing because there are no taint problems and no residuals.
ATP meters have become smaller, more robust and distinctly more affordable. Measuring points include taps, reservoirs and drip trays.