ayad jameel alkhafaji ( Professor )
Faculty of ( Head of the Department )
[email protected]
patent Designing and manufacturing of Laser Sterilization unit for raw milk work by artificially managed
The research involved the design and manufacture of a non-thermal laser system to sterilize raw milk, 650 nm (Allowed internationally) , optional power and Sterilization period , using 50, 60 and 70mW and 0.5, 1.0, 1.5 , 2.0 minutes, the operation of the system in terms of discharge, radiation power and sterilization time was self controlled ( artificial intelligence) , by using an Arduino electronic board , that is organized and controlled using a personal computer, tablet or even mobile device , after installation of control programs, In C programming language .this sterilization system consist of two tanks ( raw milk and sterilized milk) and laser sterilization channel (30 x 5 x 5 cm), laser lamps have been fixed almost vertically in the inner top surface of this channel, to give the radiation towards the bottom of the channel , a mirror was fixed horizontally in the bottom of channel .The sterilization channel is equipped with pumps to make disturbing in the milk flow . The results were compared with the sterilization of raw milk in the conventional method at 121 ° C for 15 minutes. The main results were as follows: The laser system achieved a 100% kill rate for all microbiological tests such as total count of bacteria, E coli , salmonella and yeasts and fungus , at alaser power of 70 mW and 1.5 and 2.0 minutes , superior to the thermal method in the total count of bacteria that recorded 4.33 × 104CFU and the same with the rest of the districts, The laser system achieved a productivity of 68.0 tons / day, and an annual net profit of 61.2 million ID/year, compared to thermal sterilization 0.09 tons / day and net profit 50.3 thousand ID/year , with same percentage of kill rate 100% , and we notice that is a big difference in daily production and annual profit which indicates the economic efficiency.The size of the sterilization unit is the determinant of the laser system's productivity, which can be multiplied many times easily by increasing the size of the sterilization channel by increasing the number of laser heads used .