UV disinfection principle
UV rays can be divided into UV-A (320-400nm) , UV-B (275-320nm) , UV-C (200-275nm) and vacuum ultraviolet rays according to their biological effects. In water treatment, the UV-C part of ultraviolet rays is actually used. In this band, the ultraviolet rays around 260nm have been proven to have the highest sterilization efficiency.
Guanyu UV sterilizer integrates comprehensive sciences such as optics, microbiology, mechanics, chemistry, electronics, and fluid mechanics. A specially designed high-efficiency, high-intensity, and long-life UV - C light generator is used to generate strong UV- C light to irradiate the flowing water. When bacteria and viruses in the water are exposed to a certain dose of UV- C light (wavelength 253.7nm), their cell DNA and structure are destroyed, and cell regeneration cannot proceed, thereby achieving water disinfection and purification. The spectrum with a wavelength of 185nm can also decompose organic molecules in the water, generate hydrogen radicals, and oxidize organic molecules in the water into carbon dioxide, thereby achieving the purpose of removing TOC.
Ultraviolet disinfection has the following advantages
★High efficiency sterilization rate: Ultraviolet rays can generally achieve a sterilization rate of 99%-99.9% for bacteria and viruses within one to two seconds.
★Broad-spectrum sterilization: The broad-spectrum sterilization of ultraviolet light is the highest at present, and it has a high efficiency in killing almost all bacteria and viruses.
★No secondary pollution: UV sterilization does not require the addition of any chemical agents, so it will not cause secondary pollution to the water body and the surrounding environment. It does not change any components in the water.
★Safety and environmental protection: Traditional disinfection technologies such as chloride or ozone use highly toxic and flammable substances. However, there is no such safety hazard in the ultraviolet disinfection system.
★Low cost: Ultraviolet disinfection equipment has the advantages of small footprint, easy installation, low operating cost and small total investment. The operating cost is 1/2 of chlorine disinfection.
Guanyu UV sterilizer disinfection equipment features
★ Imported lamps: high efficiency, long life
The equipment uses imported lightsources/Philips ultraviolet lamps, which have high-intensity output, high conversion rate, long life, good reliability, and good continuous sterilization and disinfection effect;
★ Professional customized ballast
The electronic ballast used in the equipment with stable performance and high matching is specially produced and customized for this product, and has the characteristics of strong adaptability, high matching, long life and complete protection functions;
★ Imported quartz sleeve
The high purple transmittance and high sterilization rate casing is made of pure imported raw material quartz from Pacific Ocean, which has good matching and high purple transmittance (the ultraviolet purple transmittance is above 93%).
★ Big brand pharmaceutical (food) grade 316 (304) stainless steel raw materials
The product adopts customized production of plates and pipes, and the main parts are cut, punched and cut by laser. The product has uniformity, consistency, interchangeability, aesthetics, high precision, small error, easy installation, fast and efficient, saving time, effort and labor
Factors Affecting the Sterilization Effect of Ultraviolet Light
★ Ultraviolet transmittance (UVT)
The important factors that affect the UV sterilization effect are the UV transmittance of the sterilization medium (water) or the medium absorptivity (absorbance). The UV transmittance and the medium absorptivity are affected by factors such as dissolved organic matter, inorganic matter and undissolved suspended matter in the water.
★ Total suspended particulate matter (TSS)
The effect of suspended particles on the sterilization effect of ultraviolet rays is also very obvious. Suspended particles can absorb and reflect ultraviolet rays, thereby preventing ultraviolet rays from irradiating the DNA of bacteria and viruses. In addition, suspended particles will also accelerate the scaling and contamination of the quartz sleeve, thereby affecting the sterilization effect.
★ Particle size
The size of particles in the water has a great influence on the effect of UV sterilization, because large suspended particles will form shadows and dead corners for the protection of bacteria and viruses. Usually the effluent from the secondary sedimentation tank is more conducive to UV sterilization, and the average size of suspended particles in the water should be less than 30um.
★ Exposure time
Exposure time is related to flow rate. When designing a UV system, it is usually designed according to the peak direct flow rate. The smaller the flow rate, the longer the exposure time, and the greater the effective dose of the system.
The inactivation effect of ultraviolet disinfection on microorganisms in water
| type
|
name | Time required to kill 100% ( seconds ) | type | name | 100% kill (seconds) |
| Bacteria
|
Bacillus anthracis | 0.30 | Bacteria
|
Mycobacterium tuberculosis | 0.41 |
| Corynebacterium diphtheriae | 0.25 | Vibrio cholerae | 0.64 | ||
| Tetanus bacteria | 0.33 | Pseudomonas | 0.37 | ||
| Clostridium botulinum | 0.80 | Salmonella | 0.51 | ||
| Shigella dysenteriae | 0.15 | Enterobacteriaceae | 0.41 | ||
| Escherichia coli | 0.36 | Salmonella typhimurium | 0.53 | ||
| Viruses
|
Adenovirus | 0.10 | Viruses
|
Influenza virus | 0.23 |
| Bacteriophage virus | 0.20 | Poliovirus | 0.80 | ||
| Coxsackievirus | 0.08 | Rotavirus | 0.52 | ||
| ECO virus | 0.73 | Tobacco mosaic virus | 16 | ||
| Echovirus type I | 0.75 | Hepatitis B virus | 0.73 | ||
| Mold spores | Aspergillus niger | 6.67 | Mold spores
|
Soft spore | 0.33 |
| Aspergillus | 0.73-8.80 | Penicillium | 2.93-0.87 | ||
| Dung fungus | 8.0 | Penicillium toxigenicum | 2.0-3.33 | ||
| Mucor | 0.23-4.67 | Other Penicillium species | 0.87 | ||
| Algae
|
Blue-green algae | 10-40 | Algae
|
Paramecium | 7.30 |
| Chlorella | 0.93 | Green Algae | 1.22 | ||
| Nematode eggs | 3.40 | Protozoa | 4-6.70 | ||
| Fish diseases
|
Fung1 disease | 1.60 | Fish diseases
|
Infectious pancreatic necrosis | 4.0 |
| Leukoplakia | 2.67 | Viral hemorrhagic disease | 1.6 |
Common bacteria UV disinfection various sterilization effects required dosage
|
Product Name dose
|
90% | 99% | 99.9% | 99.999% | 99.9999% |
| Dose (uw.s/ cm² ) | Dose (uw.s/ cm² ) | Dose (uw.s/ cm² ) | Dose (uw.s/ cm² ) | Dose (uw.s/ cm² ) | |
| Escherichia coli | 3000 | 4800 | 6600 | 10500 | 15000 |
| Salmonella | 2700 | 4100 | 5500 | 7100 | 8500 |
| Rotavirus | 9100 | 19000 | 26000 | 36000 | 48000 |
Notes: above dimension is equipment length plus width, height and accessory equipment dimension can custom-make according to practical situation, other parameter are in line with actual product.Guanyu UV sterilizer labeled with GYA is auto cleaning style, GYM is manual cleaning style, GYC means common style, GYF means frame (open channel) style.
Dosage required for UV disinfection of bacteria and microorganisms (99.9% sterilization effect)
|
Product Name Product Name dose
|
99.9% |
Product Name Product Name dose
|
99.9% |
| Dose (uw.s/ cm² ) | Dose (uw.s/ cm² ) | ||
| BACTERIA | MOLD SPORES(Mold Spores) | ||
| Bacillus anthracis | 8700 | Aspergillus flavus | 99000 |
| Bacillus | 2500 | Mucor multiforme | 35200 |
| Bacillus subtilis | 11000 | VIRUSES | |
| Bacillus subtilis | 22000 | coli phage | 6600 |
| Tetanus bacteria | 22000 | Bacteriophage | 6600 |
| Corynebacterium diphtheriae | 6500 | Enteritis virus | 8000 |
| Escherichia coli | 6600 | Cold Viruses | 6600 |
| Micrococcus proteoglycans | 15400 | Poliovirus | 6000 |
| Mycobacterium tuberculosis | 10000 | Cryptospordium | 19000 |
| Salmonella Enteritidis | 7600 | Staphylococcus faecalis | 10000 |
| Shigella dysenteriae | 4200 | Streptococcus | 3800 |
| Staphylococcus aureus | 6600 | Vibrio cholerae | 6500 |
Best conditions for using UV sterilizer
Iron content: no more than 0.3ppm (0.3mg/L)
Suspended solids: not more than 10 ppm (10 mg/L)
Water hardness: not more than 120 mg/L
Water temperature: 5℃~60℃
Hydrogen sulfide: not more than 0.05 ppm (0.05 mg/L)
Manganese content: not more than 0.5ppm (0.5 mg/L)
Chroma: No more than 15 degrees
Application range of UV sterilizer
★Water disinfection for deep processing of food, beverages, pharmaceuticals, and fruits, etc.
★Ultrapure water for the electronics industry, outdoor water supply systems for military camps
★Disinfection of water used in hospitals and laboratories, and wastewater with high pathogen content
★ Drinking water disinfection in residential areas, office buildings, hotels, restaurants, water plants, etc.
★ Aquaculture, marine aquaculture, freshwater seedling cultivation, aquatic product processing, purification and disinfection, etc.
★ Disinfection of urban sewage, reclaimed water and landscape water
★ Water disinfection for swimming pools and water parks
★ Thermal power, industrial production cooling water, central air conditioning system cooling water disinfection
★ Disinfection of water used in biological, chemical pharmaceutical and cosmetic production
★Disinfection and purification required for high-end environments such as agricultural breeding, agricultural greenhouses, agricultural irrigation, etc.
Technical Parameters
|
Product Model |
Processed water volume m³/H |
Inlet pipe diameter DN |
Power W |
Working pressure MPa |
| GYC-UUVC-15 | 0.5 |
15 |
15 |
0.4 |
| GYC-UUVC-23 | 1 |
20 |
23 |
0.4 |
| GYC-UUVC-40 | 1.5-2 |
25 |
40 |
0.6 |
| GYC-UUVC-75 | 4-5 |
32 |
55 |
0.6 |
| GYC-UUVC-120 | 9-10 |
40 |
120 |
0.6 |
| GYC-UUVC-150 | 12-15 |
50 |
150 |
0.6 |
| GYC-UUVC-240 | 22-25 |
50 |
240 |
0.6 |
Note: The water treatment capacity of the above products is for reference only. Different industries and water qualities require different models. The selection parameters are subject to actual working conditions.
