Influence of a Combined Treatment Process on Sterilization Performance in UV-C Water Disinfection

Water is the most important resource on our planet. It can only be consumed by humans if it is of a certain quality. A specific purity of water is also necessary for laboratory standards for experiments and tests. Therefore, it is necessary to clean and purify it. It is also important to ensure that the purification process is resource-saving, effective and efficient, at least to protect the environment. For this reason, new purification principles are constantly being researched, existing ones are improved, or different ones are combined to achieve better performance in a cost- and energy-saving way. This work investigates the effectiveness of combined water treatment using various purification processes in combination with UV-C disinfection. Primarily, the disinfection effect of new UV-C diodes in the wavelength range of 250 nm to 315 nm is investigated in different wavelength spectral setups. In addition, the level of disinfection is analyzed with varying parameters such as water temperature, flow velocity and voltage changes. The disinfection performance has also been evaluated in combinations of UV-C disinfection with ultrasound exposure and ozone as a negative example. The results of these studies will be used for the further development of a modular water treatment system. This system can be modified with different modules to purify water, add water constituents, or measure specific parameters simultaneously. The results will be used to develop and adjust different modules for the system.