Shenzhen Shuitianlan UV sterilizers work for drinking water, feed‑water, domestic water, sewage and reclaimed‑water. Without changing physical and chemical properties of water, they are widely used in secondary water supply, food production, drinking‑water systems, water supply‑drainage, chemical industry, swimming pools and many other sectors. Featuring compact size, light weight, low power consumption, long service life and low cost, they show remarkable advantages compared with other sterilization methods.

1. Product Introduction

This is a low‑flow UV disinfection unit equipped with high‑intensity, odor‑free UV germicidal lamps of world‑leading standard. Its reactor cylinder is made of food‑grade 304 stainless steel with specially treated inner walls. Pre‑treated water flowing through the cylinder receives sufficient irradiation at 253.7 nm wavelength for effective disinfection. Since physical and chemical properties of water remain unchanged, this equipment serves as an ideal option for drinking‑water, food‑beverage, chemical, electronic, pharmaceutical, sewage and reclaimed‑water scenarios.

The horizontal‑configured unit delivers fast, highly‑efficient disinfection. Under standard water‑treatment requirements, 10‑second UV exposure achieves a 99.99 % kill rate against bacteria and viruses in water.

UV‑treated water retains its original physical and chemical characteristics and generates no secondary contamination. Operation is simple and user‑friendly. Standard products for different flow rates are available. Routine maintenance mainly consists of replacing UV lamps and cleaning quartz sleeves.

With small footprint, light weight, low power draw, long service life and low operating cost, the equipment presents prominent advantages over competing sterilization technologies and enjoys extensive application.

Main components: UV lamp, quartz sleeve, ballast, sealing assemblies, reactor tank, water inlet and water outlet.

2. Working Principle of UV Disinfection

According to biological effects, ultraviolet radiation falls into UV‑A (320‑400 nm), UV‑B (275‑320 nm), UV‑C (200‑275 nm) and vacuum‑UV bands. Water disinfection primarily utilizes the UV‑C band; maximum germicidal efficiency occurs near 260 nm.

Shuitianlan UV sterilizers integrate optics, microbiology, mechanical engineering, chemistry, electronics and hydrodynamics. High‑efficiency, high‑intensity long‑life UV‑C generators produce strong UV‑C rays to irradiate flowing water. When bacteria, viruses and other pathogens in water absorb adequate UV‑C energy (253.7 nm), their DNA and cellular structures are damaged, prohibiting cell reproduction and realizing water disinfection and purification.

The 185 nm spectral line decomposes organic molecules in water, generating hydroxyl free radicals that oxidize organics into carbon dioxide, thereby removing total organic carbon (TOC).

3. Advantages of UV Disinfection

1. High disinfection efficiency: A 1‑2‑second UV exposure generally reaches a 99 %‑99.9 % inactivation rate for bacteria and viruses.

2. Broad‑spectrum disinfection: UV provides one of the broadest‑spectrum disinfection performance, effectively inactivating nearly all water‑borne bacteria and viruses.

3. Zero secondary pollution: No chemical agents are dosed. Water composition and surrounding environment remain free from secondary contamination.

4. Safe and reliable operation: Conventional disinfection such as chlorination or ozone employs toxic, flammable disinfectants. UV systems avoid such hazards.

5. Low capital and operating‑maintenance cost: UV equipment occupies little space and requires simple civil structures, cutting total investment. Operating expenses are also low: for thousand‑ton‑scale water‑treatment projects, operating cost is approximately half that of chlorination.

4. Equipment Features

1. High‑performance UV‑C (LL or LH) ultraviolet lamps World‑leading low‑pressure high‑intensity UV lamps are adopted with guaranteed service life of 8 000‑10 000+ operating hours.

2. High‑purity, high‑transmittance quartz sleeves with UV transmittance exceeding 90 %.

3. Advanced dedicated constant‑intensity UV ballasts ensure stable system performance under complex working conditions.

4. High‑quality 304 / 316 stainless‑steel reactors with specially polished inner surfaces to maximize disinfection performance.

5. Microorganism Inactivation Performance

Table 1 Germicidal efficiency of UV technology against common bacteria and viruses (UV irradiance: 30 mW/cm²)

6.Optimal Operating Water‑Quality Conditions