What is the ultra violet light disinfecting process?

They are not reset, but replaced. But before doing that, change the lamp to see if it will work.

The meaning of the prefix ultra is: beyond in space, range, limits or what's ordinary etc. Examples include ultramarine, ultra-violet, ultra conservative etc

It derives from the Latin word "beyond".

1. Beyond; on the other side of: ultraviolet.
2. Beyond the range, scope, or limit of: ultrasonic.
3. Far beyond the normal or proper degree of: ultraconservative.

The UV index is how ultra violet is measured, the index ranges from 0-11 with 0 being the lowest danger of the UV rays and 11 being the highest danger of exposure to UV.

UV (ultraviolet) light is, according to Wikipedia, "electromagnetic radiation with a wavelength shorter than that of visible light, but longer than X-rays"
"It is so-named because the spectrum consists of electromagnetic waves with frequencies higher than those that humans identify as the color violet. These frequencies are invisible to humans, but visible to a number of insects and birds." (wikipedia)

Water disinfection is a purification process that kills or removes biological contaminations from water sources. In some cases, additional contaminations may be added to the water by the disinfection process.

The water purification process in not vey one sided. The purification process contains many steps. The steps that need to be progressed depend on the kind of impurities that are found in the water. This can differ very much for different types of water.

are the bulbs exposed to any sort of vibration?

Fill with Ultra Violet Coolant and then use black light to find.