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UV dose design

In the water treatment disinfection/oxidation process, the design of UV dose, selection and configuration of lamp models must follow the six steps of "required dose → water quality parameters → hydraulic conditions → lamp selection → dose calculation and verification biological verification or CFD simulation → fault point design".


Introduction

1. Required dose

Actual dose requirements（Dose Target）

According to the standard




Drinking water (including direct drinking water)

40 mJ/cm²




Class A sewage discharge

20 mJ/cm²




Recycled water reuse

40-60 mJ/cm²




Medical wastewater

60-80 mJ/cm²




ballast water（IMO）

60 mJ/cm²




 

2. Determine the UVT254 transmittance, flow rate, TSS, and other water quality parameters.

3. Select the photochemical reaction flow pattern and effective UV power requirements based on hydraulic conditions.

4. Select the most suitable lamp and configuration.

Low-pressure high-intensity lamp (LPHO)

Medium-pressure lamp (MP)

Low-pressure amalgam lamp

5. Dose calculation and verification (RED)

6. Fault point design

The lamp configuration should be designed based on the maximum flow rate fluctuation of the system, the attenuation coefficient before lamp replacement due to aging, and the worst-case scaling factor that the cleaning system can achieve.

Through these steps, the UV system can achieve a balance between regulatory compliance, cost-effectiveness, and ease of operation and maintenance.

Customer UV Dosage Design Requirement Form (link)

ONYX UV Photochemical Intelligent Dosage Design and Equipment Recommendations (link)



Parameter

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