Why are wastewater treatment plants switching from chlorine disinfection to UV disinfection?

The core drivers for wastewater treatment plants switching from chlorine disinfection to UV disinfection are environmental protection (eliminating harmful byproducts and residual chlorine toxicity), operational safety (eliminating hazardous chemicals), and effective control of chlorine-resistant pathogens. UV disinfection also offers significant advantages in meeting increasingly stringent regulatory requirements, reducing long-term operating costs (taking into account chemical, safety, and envir…

What are the applications of ultraviolet light in wastewater treatment?

(1) Disinfection: Inactivation of microorganisms. As the core disinfection process, it is usually used alone or in combination with chlorine disinfection, depending on the use of the wastewater and relevant standards.(2) Removal of organic matter in water: Combined with oxidants such as ozone and hydrogen peroxide, it forms ultraviolet advanced oxidation technology (UV-AOPs) to remove organic matter in water.

What is Photo-Fenton technology?

Photo-Fenton is an Advanced Oxidation Process (AOP) that combines UV photocatalysis with the Fenton reaction. It utilizes UV light to generate hydroxyl radicals for efficient degradation of refractory organic pollutants. Compared to traditional Fenton, Photo-Fenton continuously regenerates Fe2+ through UV irradiation, reducing iron sludge production and improving oxidation efficiency. Onyx Photo-Fenton equipment features a proprietary UV reactor design with over 40% improvement in light energy utilization.

What is UV-AOP (UV Advanced Oxidation Process)?

UV-AOP is an advanced oxidation process centered on ultraviolet light. It uses UV to activate oxidants (such as H2O2, O3) to generate hydroxyl radicals with an oxidation potential of 2.8V, second only to fluorine, capable of non-selectively degrading most organic compounds. This process is commonly used in chemical, pharmaceutical, and dyeing industries for refractory wastewater treatment, effectively reducing COD, removing color and toxicity, and improving biodegradability (B/C ratio) for subsequent biological treatment.

How to choose the right UV disinfection equipment?

Selecting UV disinfection equipment requires comprehensive consideration of: (1) Treatment capacity (peak flow rate) determines equipment sizing; (2) Water quality parameters (UVT, turbidity, suspended solids) affect dose design; (3) Disinfection requirements (target microorganisms and log reduction) determine UV dose; (4) Installation method (open channel/in-pipe) depends on site conditions; (5) Maintenance needs (automatic cleaning, lamp replacement cycle) affect long-term operating costs. Professional manufacturer consultation is recommended for sizing calculations. Onyx provides free water quality analysis and system design services.

What is the lifespan of UV lamps and when should they be replaced?

The effective service life of low-pressure amalgam UV lamps is generally 12,000 hours, and medium-pressure UV lamps approximately 4,000-6,000 hours. Lamps should be replaced when UV output intensity drops to 70%-80% of the initial value, or when the PLC system detects insufficient dose. Regular monitoring of UV intensity sensor readings is recommended, along with maintaining a lamp replacement log. Onyx equipment features an intelligent lamp life management module that automatically alerts for replacement timing.

What are the differences between UV disinfection and ozone disinfection?

Main differences between UV and ozone disinfection: (1) Principle - UV damages DNA photochemically, ozone destroys cell structure through strong oxidation; (2) Residual - UV leaves no residual or byproducts, ozone requires decomposition of residual ozone; (3) Contact time - UV disinfects in seconds, ozone requires minutes; (4) Operating cost - UV is lower (electricity only), ozone requires higher power for oxygen generation; (5) Application - UV suits high-flow continuous water treatment, ozone suits color/odor removal and advanced oxidation. Both can be combined for synergistic disinfection effects.

What industries and wastewater types is Photo-Fenton technology suitable for?

Photo-Fenton technology is widely applicable to the following industrial wastewater treatment: (1) Chemical wastewater (pesticides, fine chemical intermediates); (2) Pharmaceutical wastewater (antibiotics, synthetic drug residues); (3) Dyeing wastewater (dye intermediates, high-color wastewater); (4) Electroplating wastewater (heavy metal complex breaking); (5) Landfill leachate (high-concentration refractory organics); (6) Coking wastewater (phenol and cyanide degradation); (7) Paper mill wastewater (lignin degradation). Particularly effective for wastewater with B/C ratio below 0.3, significantly improving biodegradability before entering biological treatment systems.

What are the advantages of UV-AOP compared to traditional chemical oxidation?

Advantages of UV-AOP over traditional chemical oxidation (such as Fenton, sodium hypochlorite): (1) Stronger oxidation - hydroxyl radical potential 2.8V, much higher than conventional oxidants; (2) Non-selective - degrades most organic pollutants; (3) No secondary pollution - only H2O2 addition, no iron sludge byproducts; (4) Fast reaction - typically completes in seconds to minutes; (5) Precise controllability - adjusted via UV power and H2O2 dosage; (6) Small footprint - compact equipment suitable for existing plant retrofit projects.

How do UV disinfection systems handle low-temperature winter environments?

Impact of winter low temperatures and countermeasures: (1) Lamp startup - lamps need preheating in low temperatures; amalgam lamps recommended for better cold-start performance; (2) Water quality changes - lower winter temperatures increase microbial resistance; UV dose should be increased by 20%-30%; (3) Equipment insulation - open channel equipment needs thermal covers, in-pipe equipment can add electric heat tracing; (4) Operation monitoring - strengthen UV intensity sensor monitoring and adjust power output accordingly. Onyx equipment supports stable operation at -20C with a low-temperature protection module.

What certifications and standards do Onyx UV equipment meet?

Onyx UV disinfection equipment meets the following certifications and standards: (1) NSF/ANSI 55 certification (Class A UV disinfection equipment for drinking water applications); (2) GB/T 19837-2019 national standard for UV disinfection equipment in urban water supply and drainage; (3) CE certification (electrical safety and electromagnetic compatibility); (4) ISO 9001 quality management system certification; (5) UL certification (North American electrical safety). Product test reports are issued by third-party authoritative organizations, covering UV dose, sterilization efficiency, and electrical safety.

How to calculate the operating cost of UV disinfection systems?

UV disinfection system operating costs mainly include: (1) Electricity - UV lamps + ballasts + auxiliary equipment power, approximately 0.003-0.01 RMB/ton; (2) Lamp replacement - amortized over 12,000-hour lifespan, approximately 0.002-0.005 RMB/ton; (3) Cleaning maintenance - quartz sleeve cleaning (chemical/mechanical), approximately 0.001 RMB/ton; (4) Manual inspection - routine patrol + periodic maintenance. Total operating cost is approximately 0.006-0.016 RMB/ton, significantly lower than chlorine and ozone disinfection, making it the most cost-effective physical disinfection method.

ONYX is an environmental technology company

FAQs

Why are wastewater treatment plants switching from chlorine disinfection to UV disinfection?
2025-07-22

The core drivers for wastewater treatment plants switching from chlorine disinfection to UV disinfection are environmental protection (eliminating harmful byproducts and residual chlorine toxicity), operational safety (eliminating hazardous chemicals), and effective control of chlorine-resistant pathogens. UV disinfection also offers significant advantages in meeting increasingly stringent regulatory requirements, reducing long-term operating costs (taking into account chemical, safety, and environmental costs), and increasing public acceptance. While UV disinfection has specific application conditions and maintenance requirements, its environmental friendliness and safety make it the disinfection technology of choice for modern advanced wastewater treatment, especially for discharge into sensitive water bodies.
What are the applications of ultraviolet light in wastewater treatment?
2025-07-22

(1) Disinfection: Inactivation of microorganisms. As the core disinfection process, it is usually used alone or in combination with chlorine disinfection, depending on the use of the wastewater and relevant standards.
(2) Removal of organic matter in water: Combined with oxidants such as ozone and hydrogen peroxide, it forms ultraviolet advanced oxidation technology (UV-AOPs) to remove organic matter in water.
What is Photo-Fenton technology?
2026-08-05

Photo-Fenton is an Advanced Oxidation Process (AOP) that combines UV photocatalysis with the Fenton reaction. It utilizes UV light to generate hydroxyl radicals for efficient degradation of refractory organic pollutants. Compared to traditional Fenton, Photo-Fenton continuously regenerates Fe2+ through UV irradiation, reducing iron sludge production and improving oxidation efficiency. Onyx Photo-Fenton equipment features a proprietary UV reactor design with over 40% improvement in light energy utilization.
What is UV-AOP (UV Advanced Oxidation Process)?
2026-08-05

UV-AOP is an advanced oxidation process centered on ultraviolet light. It uses UV to activate oxidants (such as H2O2, O3) to generate hydroxyl radicals with an oxidation potential of 2.8V, second only to fluorine, capable of non-selectively degrading most organic compounds. This process is commonly used in chemical, pharmaceutical, and dyeing industries for refractory wastewater treatment, effectively reducing COD, removing color and toxicity, and improving biodegradability (B/C ratio) for subsequent biological treatment.
How to choose the right UV disinfection equipment?
2026-08-05

Selecting UV disinfection equipment requires comprehensive consideration of: (1) Treatment capacity (peak flow rate) determines equipment sizing; (2) Water quality parameters (UVT, turbidity, suspended solids) affect dose design; (3) Disinfection requirements (target microorganisms and log reduction) determine UV dose; (4) Installation method (open channel/in-pipe) depends on site conditions; (5) Maintenance needs (automatic cleaning, lamp replacement cycle) affect long-term operating costs. Professional manufacturer consultation is recommended for sizing calculations. Onyx provides free water quality analysis and system design services.
What is the lifespan of UV lamps and when should they be replaced?
2026-08-05

The effective service life of low-pressure amalgam UV lamps is generally 12,000 hours, and medium-pressure UV lamps approximately 4,000-6,000 hours. Lamps should be replaced when UV output intensity drops to 70%-80% of the initial value, or when the PLC system detects insufficient dose. Regular monitoring of UV intensity sensor readings is recommended, along with maintaining a lamp replacement log. Onyx equipment features an intelligent lamp life management module that automatically alerts for replacement timing.
What are the differences between UV disinfection and ozone disinfection?
2026-08-05

Main differences between UV and ozone disinfection: (1) Principle - UV damages DNA photochemically, ozone destroys cell structure through strong oxidation; (2) Residual - UV leaves no residual or byproducts, ozone requires decomposition of residual ozone; (3) Contact time - UV disinfects in seconds, ozone requires minutes; (4) Operating cost - UV is lower (electricity only), ozone requires higher power for oxygen generation; (5) Application - UV suits high-flow continuous water treatment, ozone suits color/odor removal and advanced oxidation. Both can be combined for synergistic disinfection effects.
What industries and wastewater types is Photo-Fenton technology suitable for?
2026-08-05

Photo-Fenton technology is widely applicable to the following industrial wastewater treatment: (1) Chemical wastewater (pesticides, fine chemical intermediates); (2) Pharmaceutical wastewater (antibiotics, synthetic drug residues); (3) Dyeing wastewater (dye intermediates, high-color wastewater); (4) Electroplating wastewater (heavy metal complex breaking); (5) Landfill leachate (high-concentration refractory organics); (6) Coking wastewater (phenol and cyanide degradation); (7) Paper mill wastewater (lignin degradation). Particularly effective for wastewater with B/C ratio below 0.3, significantly improving biodegradability before entering biological treatment systems.
What are the advantages of UV-AOP compared to traditional chemical oxidation?
2026-08-05

Advantages of UV-AOP over traditional chemical oxidation (such as Fenton, sodium hypochlorite): (1) Stronger oxidation - hydroxyl radical potential 2.8V, much higher than conventional oxidants; (2) Non-selective - degrades most organic pollutants; (3) No secondary pollution - only H2O2 addition, no iron sludge byproducts; (4) Fast reaction - typically completes in seconds to minutes; (5) Precise controllability - adjusted via UV power and H2O2 dosage; (6) Small footprint - compact equipment suitable for existing plant retrofit projects.
How do UV disinfection systems handle low-temperature winter environments?
2026-08-05

Impact of winter low temperatures and countermeasures: (1) Lamp startup - lamps need preheating in low temperatures; amalgam lamps recommended for better cold-start performance; (2) Water quality changes - lower winter temperatures increase microbial resistance; UV dose should be increased by 20%-30%; (3) Equipment insulation - open channel equipment needs thermal covers, in-pipe equipment can add electric heat tracing; (4) Operation monitoring - strengthen UV intensity sensor monitoring and adjust power output accordingly. Onyx equipment supports stable operation at -20C with a low-temperature protection module.
What certifications and standards do Onyx UV equipment meet?
2026-08-05

Onyx UV disinfection equipment meets the following certifications and standards: (1) NSF/ANSI 55 certification (Class A UV disinfection equipment for drinking water applications); (2) GB/T 19837-2019 national standard for UV disinfection equipment in urban water supply and drainage; (3) CE certification (electrical safety and electromagnetic compatibility); (4) ISO 9001 quality management system certification; (5) UL certification (North American electrical safety). Product test reports are issued by third-party authoritative organizations, covering UV dose, sterilization efficiency, and electrical safety.
How to calculate the operating cost of UV disinfection systems?
2026-08-05

UV disinfection system operating costs mainly include: (1) Electricity - UV lamps + ballasts + auxiliary equipment power, approximately 0.003-0.01 RMB/ton; (2) Lamp replacement - amortized over 12,000-hour lifespan, approximately 0.002-0.005 RMB/ton; (3) Cleaning maintenance - quartz sleeve cleaning (chemical/mechanical), approximately 0.001 RMB/ton; (4) Manual inspection - routine patrol + periodic maintenance. Total operating cost is approximately 0.006-0.016 RMB/ton, significantly lower than chlorine and ozone disinfection, making it the most cost-effective physical disinfection method.

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Craftsmanship UV disinfection UV photolysis UV Advanced Oxidation Reverse Osmosis Alternative to pasteurization UV photochemical reaction Ozone oxidation

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Municipal WSH UV Disinfection System WTV UV Disinfection Vertical System ZL UV Disinfection System Clear Medium Pressure UV Disinfection System MOL Ceramic Plate CD Ozone Generator UV-AOP Advanced Oxidation System D.FITE Cloth Filter

Industry ZL UV Disinfection System Clear Medium Pressure UV Disinfection System UV-AOP Advanced Oxidation Extrem Medium Pressure UV Disinfection System EX-U UV Sterilizer EX-UPW-TOC UV TOC System MOM Ceramic Plate CD Ozone Generator MOS Ceramic Plate CD Ozone Generator UV-Fenton UV-Oxidation

Commercial EX-L UV Sterilizer EX-U UV Sterilizer ZL UV Disinfection System CLEAR Medium pressure UV Disinfection System OneUV UV Sterilizer Extrem Medium pressure UV Disinfection System UV-AOP Advanced Oxidation MOS Ceramic Plate CD Ozone Generator COG Ceramic Plate CD Ozone Generator

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Spare parts Low Pressure lamps Low Pressure Amalgam Lamps Medium Pressure Mercury Lamp VUV Low-pressure Mercury Lamp（185nm） Quartz sleeve Ballasts UV Intensity Sensor UV transmittance tester Sealing accessories Other Spare parts replacement

Resources

Why are wastewater treatment plants switching from chlorine disinfection to UV disinfection?
2025-07-22

What are the applications of ultraviolet light in wastewater treatment?
2025-07-22

What is Photo-Fenton technology?
2026-08-05

What is UV-AOP (UV Advanced Oxidation Process)?
2026-08-05

How to choose the right UV disinfection equipment?
2026-08-05

What is the lifespan of UV lamps and when should they be replaced?
2026-08-05

What are the differences between UV disinfection and ozone disinfection?
2026-08-05

What industries and wastewater types is Photo-Fenton technology suitable for?
2026-08-05

What are the advantages of UV-AOP compared to traditional chemical oxidation?
2026-08-05

How do UV disinfection systems handle low-temperature winter environments?
2026-08-05

What certifications and standards do Onyx UV equipment meet?
2026-08-05

How to calculate the operating cost of UV disinfection systems?
2026-08-05

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Resources

Why are wastewater treatment plants switching from chlorine disinfection to UV disinfection? 2025-07-22

What are the applications of ultraviolet light in wastewater treatment? 2025-07-22

What is Photo-Fenton technology? 2026-08-05

What is UV-AOP (UV Advanced Oxidation Process)? 2026-08-05

How to choose the right UV disinfection equipment? 2026-08-05

What is the lifespan of UV lamps and when should they be replaced? 2026-08-05

What are the differences between UV disinfection and ozone disinfection? 2026-08-05

What industries and wastewater types is Photo-Fenton technology suitable for? 2026-08-05

What are the advantages of UV-AOP compared to traditional chemical oxidation? 2026-08-05

How do UV disinfection systems handle low-temperature winter environments? 2026-08-05

What certifications and standards do Onyx UV equipment meet? 2026-08-05

How to calculate the operating cost of UV disinfection systems? 2026-08-05

Why are wastewater treatment plants switching from chlorine disinfection to UV disinfection?
2025-07-22

What are the applications of ultraviolet light in wastewater treatment?
2025-07-22

What is Photo-Fenton technology?
2026-08-05

What is UV-AOP (UV Advanced Oxidation Process)?
2026-08-05

How to choose the right UV disinfection equipment?
2026-08-05

What is the lifespan of UV lamps and when should they be replaced?
2026-08-05

What are the differences between UV disinfection and ozone disinfection?
2026-08-05

What industries and wastewater types is Photo-Fenton technology suitable for?
2026-08-05

What are the advantages of UV-AOP compared to traditional chemical oxidation?
2026-08-05

How do UV disinfection systems handle low-temperature winter environments?
2026-08-05

What certifications and standards do Onyx UV equipment meet?
2026-08-05

How to calculate the operating cost of UV disinfection systems?
2026-08-05