Calculation of Radiation Absorption Coefficient for Dirty Water in a UV Application

How to calculate the radiation absorption coefficient for dirty water in a UV application?

UV disinfection systems are used to kill bacteria in water. UV Lamps emit radiation that has germicidal effect. In this industry, water transmittance is used to describe the quality of water. The solution of how to calculate the radiation absorption coefficient for dirty water in a UV application is given below. Solution is valid for all versions where the absorption coefficient is defined in the way shown below.