Determination of design parameters of ozonated water disinfection system used in livestock production

The main purpose of this thesis is to use ozone instead of chemicals in disinfection processes for biosecurity in dairy farms. An ozonated water application system was set up and this system was used for the disinfection The system basically consists of an ozone generator, water tank, ozone water pump and a control panel. Trials were carried out at TNKU, Faculty of Agriculture, Experimental Farm. The maximum concentration of 3 ppm was reached after 11th minute of the ozonation in the water tank of the. Then the washing was done at the following surfaces; the concrete floor of maturity area (BZ), the ceramic wall of milking parlor wall (SY), the PVC inner surface of the calf hatch (PY) and the surface of rubber cow bed (KY), Effectiveness of disinfection with ozonated water was found out by analyzing samples that taken from the surfaces before washing (YO) and after washing (YS). Total Mesophilic Aerobic Bacteria (TMAB) and Total Mold-Yeast (TKM) of the samples were determined in lab. According to the results; the highest TMAB and the highest TCM were detected on the PY surface in YO. These were 7.31 log cfu/cm2 and 5.15 log cfu/cm2, respectively. A very significant decrease of 3.63 and 2.46 in YS was achieved on these surfaces. YS values were also found to be desired level since the values of other YO were much lower. Design parameters that determined at this thesis are: The tank and delivered component of the ozonated water should be made from stainless steel. Otherwise, surface such as PVC, aluminum, rubber and polyester can be corroded by in a short time. The amount of ozone dissolved in the washing water (ozone concentration) should be at least 3 ppm. During washing, the surface should be exposed to ozonated water for at least 10 seconds.