What wavelength of light should be used for wastewater treatment?
245nm LED lights, with their specific wavelength of ultraviolet light, can effectively destroy the DNA and RNA molecular structures of microorganisms and bacteria, achieving highly efficient disinfection and sterilization, making them valuable in the field of water treatment. However, when used for underwater disinfection, these lights face extremely high waterproofing challenges. The outer casing must be completely sealed, with no risk of water leakage. Simultaneously, the power supply must be compatible with complex underwater conditions and possess high-temperature resistance to ensure long-term stable operation.
The lamp casing is made of food-grade 316L stainless steel, paired with a UV-resistant polycarbonate light-transmitting cover. Through precision die-casting and silicone sealing processes, it achieves an IP68 protection rating, allowing for long-term immersion in water. It exhibits excellent corrosion resistance and impact resistance and can withstand the chemical erosion of laboratory wastewater. The power supply section uses Class H high-temperature resistant components and employs a conductive heat dissipation structure design. Its operating temperature range covers -20℃ to 120℃, with an MTBF (Mean Time Between Failures) of no less than 200,000 hours. It also features triple protection against over-temperature, over-voltage, and short circuits, making it suitable for complex underwater environments.
We previously customized an underwater disinfection lamp system for a Canadian biological laboratory to treat laboratory wastewater containing microorganisms such as fecal coliforms and E. coli bacteriophages. The laboratory wastewater had a complex composition, with a total bacterial count reaching 10^7 CFU/mL, requiring compliance with stringent local wastewater discharge standards. To meet the client's needs, we optimized the lamp's optical design, improving the utilization rate of 245nm ultraviolet light, and integrated the disinfection lamp into the laboratory wastewater treatment system using a modular installation scheme. Actual testing showed that the disinfection lamp achieved an inactivation rate of over 99.9% against target microorganisms, reducing the total bacterial count in the effluent to below 10^3 CFU/mL, fully complying with the Canadian CRD (Canadian Capital Region) laboratory wastewater discharge standards. Furthermore, its operating energy consumption is 30% lower than that of traditional disinfection equipment, earning high praise from customers.
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