Choosing and defending a disinfection technology is a design-level decision with decades of operating and capital cost consequences — and even at a plant that never touches that original decision again, a Class A operator is expected to understand the tradeoffs well enough to evaluate whether the existing system is still the right fit as effluent quality, permit limits, or costs change over the life of the facility. This guide takes the technology overview from the earlier guides in this module to full comparative depth, then goes deep on UV system design and validation — the area where Class A-level technical judgment is most directly tested.
Full Technology Comparison: Chlorination vs. UV vs. Ozone
Disinfection Effectiveness
All three technologies can reliably meet typical fecal coliform/E. coli permit limits when properly designed, dosed, and maintained — but they are not int