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Photochemistry

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UV Photolysis

UV photolysis generally refers to the use of ultraviolet (UV) light to decompose substances, particularly pollutants.

Specific wavelengths of UV light (usually short-wavelength UV-C, such as 254 nm) can directly break the molecular bonds of certain substances (especially organic pollutants), causing a cracking reaction that breaks them down into smaller molecules, free radicals, or ultimately mineralizes them into CO₂ and H₂O. This is known as direct photolysis. It is primarily used for TOC removal in ultrapure water, residual chlorine removal and disinfection prior to RO membranes for purified water, and the decomposition and disinfection of ammonium chloride in swimming pools and water features.


Inquiry

Advantages

Parameter

Product Series

ONYX-EX-UPW-TOC

ONYX-Clear

ONYX-Extrem

Application

Ultrapure water TOC removal

Residual chlorine removal and disinfection before RO membrane of purified water

Decomposition and disinfection of ammonium chloride in swimming pools and water features

Inlet and outlet sizes

DN50-DN200

DN100-DN600

DN80-DN200

Lamp type

Low pressure lamps

Medium pressure lamps

Medium pressure lamps

Lamp life

12000h

9000h

9000h

Single lamp power

85w、155w(185, 254nm dual band)

1~12KW

1~3KW

Lamp power adjustment range

50-100%

50-100%

50-100%

Shell material

Stainless steel 316L

Stainless steel 304/316L

Stainless steel 316L

Cleaning drive system

/

Motor Drive

Motor Drive

Automatic Cleaning

/

Online Automatic Mechanical Cleaning

Online Automatic Mechanical Cleaning

UV intensity sensor

1 per device

1 per device

1 per device

Temperature sensor

1 per device

1 per device

1 per device

Installation location

Indoor

Indoor

Indoor

Control Cabinet Protection Level

IP54

IP54

IP54

Control System

Touch screen + PLC control

Touch screen + PLC control

Touch screen + PLC control

Power specifications

220V/50HZ

220V/50HZ

220V/50HZ

Head loss

<400mm

<400mm

<400mm


Technical Specifications

Parameter Specification
ModelUV Photolysis
Treatment CapacityCustomized, range 1 - 100,000 m3/day
UV Dose≥40 mJ/cm2 (meets NSF/EPA standards)
Lamp TypeLow-pressure high-output / Medium-pressure (optional)
Effective Lamp Lifespan12,000 - 17,000 hours
Reactor Material316L Stainless Steel / 304 Stainless Steel
Operating Temperature5 - 45 °C
IP RatingIP68 (lamp module) / IP65 (control cabinet)
Cleaning MethodAutomatic mechanical cleaning / Chemical cleaning (optional)
Control SystemPLC automatic control, SCADA remote monitoring supported
CertificationCE, NSF/ANSI 55, GB/T 19837

Application Scenarios

UV Photolysis is widely used in the following applications:

Technical Principle

UV disinfection technology utilizes ultraviolet light (wavelength 254nm) to damage the DNA/RNA structure of microorganisms, rendering them unable to reproduce and effectively sterilizing the water. Compared with chemical disinfection, UV treatment requires no chemical additives, produces no disinfection by-products (DBPs), achieves high inactivation efficiency against bacteria, viruses, and spores, and requires only seconds of contact time. It is a safe, environmentally friendly physical disinfection method.

ONYX UV equipment features optimized reactor hydraulic design ensuring uniform UV dose distribution, paired with an automatic cleaning system to maintain lamp transmittance for long-term stable operation. The equipment supports online UV dose monitoring and real-time operational status feedback, and can be seamlessly integrated into existing SCADA systems.

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Telephone:010-82890788

Email:services@onyxepi.com

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