In response to the above problems, the application effect of UV disinfectors in the secondary water supply industry can be optimized through process combination, equipment upgrading, and management strengthening, so as to build a full-process water quality prevention and control system.
1. Adopting Combined Disinfection Processes
To make up for the shortage of no sustained bactericidal ability, it is recommended to adopt the "UV + low-dose chlorine" combined disinfection process: UV is responsible for quickly inactivating most microorganisms, and low-dose chlorine (free residual chlorine controlled at 0.05-0.3 mg/L) maintains sustained bacteriostatic effect in the pipe network. This not only avoids excessive generation of disinfection by-products, but also effectively prevents secondary pollution and microbial reactivation risks; For high-demand scenarios, advanced oxidation processes such as "UV + H₂O₂" and "UV + TiO₂" can also be adopted to improve disinfection and organic matter removal effects.
2. Upgrading Equipment and Monitoring Systems
Select UV disinfectors with intelligent monitoring and early warning functions, integrate online UV intensity monitoring, water turbidity monitoring, and flow monitoring modules to feedback operating status in real time and automatically alarm when parameters are abnormal; Equip with automatic cleaning systems and standby lamp tubes to reduce reliance on manual maintenance; Add residual chlorine monitoring points (in combined disinfection scenarios) or rapid microbial detection equipment at the end of the pipe network to detect water quality problems in a timely manner.
3. Strengthening Operation and Management Specifications
Establish standardized operation and maintenance processes, regularly clean water tanks, pipelines, and quartz sleeves of UV disinfectors, strictly replace consumables according to the service life cycle of lamp tubes, and keep detailed operation and maintenance records; Configure standby power supplies and emergency disinfection plans for scenarios with unstable power supply; Strengthen influent water quality control, regularly test the effect of pretreatment, and ensure that UV disinfectors operate under optimal water quality conditions.
VI. Industry Application Trends
With the improvement of residents' requirements for drinking water quality and the tightening of environmental protection policies, the application of UV disinfectors in the secondary water supply industry will develop towards "intelligence, high efficiency, and combination". On the one hand, low-energy-consumption, long-life UV lamp tubes (such as LED UV lamps) and intelligent operation and maintenance systems will gradually replace traditional equipment, reducing operating costs and management difficulty; On the other hand, the "UV +" combined disinfection process will become mainstream, balancing disinfection effect, sustained bacteriostatic ability, and environmental protection requirements, providing more comprehensive guarantee for the water quality safety of secondary water supply.
