SR Legionella Eradication System: Case Studies
Tens of SRLB installations in health centers and hospitals worldwide – eradicating legionella and safeguarding health with CQM Group.
See Our Self-Cleaning Legionella Eradication System At Work.
Legionella Prevention Case Study: Technion Environmental Microbiology Laboratory
Year of study: 2010
Challenge: Legionella pneumophila serogroup 1, a common pathogen in hospital and public water systems, required effective inactivation at 35°C without the risk of hazardous byproducts such as bromates. The system also needed to prevent the growth of opportunistic pathogens like Pseudomonas aeruginosa while maintaining ease of operation and safety.
Solution: CQM’s electrolysis device was tested at the Technion’s Environmental Microbiology Laboratory. The system used electrolysis to produce free chlorine and other oxidants, effectively inactivating Legionella and background bacteria while operating at lower water temperatures.
Results:
- Legionella inactivation to below detection levels (<1 CFU/liter) within 30 minutes of operation.
- Continuous operation eliminated both Legionella and background microorganisms, maintaining water quality for up to two weeks.
- Bromate concentrations were minimal and well within safe limits (7.6–11.4 µg/L under test conditions).
- The system effectively prevented bacterial regrowth during extended inactivity, demonstrating robust long-term disinfection capabilities.
Conclusion:
The Technion’s experiments verified CQM’s device as a reliable and efficient solution for Legionella and bacterial disinfection in water systems, even at low operating temperatures. This technology offers a chemical-free, environmentally friendly alternative for hospitals, elderly homes, and similar facilities.
Bnai-Zion Rothschild Hospital, Israel
Year of installation: 2010
Challenge: The hospital needed an effective solution to eliminate Legionella from its hot water system without relying on chemicals or increasing water temperatures above 60°C, as required by Israel’s Ministry of Health.
Solution: CQM installed the SRBL system, an innovative bactericide and Legionella disinfection solution, designed to disinfect recirculating hot water—even in low-velocity pipes—without raising water temperature or using hazardous chemicals.
Results:
- Zero Legionella count in all periodic Ministry of Health tests since installation.
- Safe, chemical-free water disinfection, ensuring compliance and patient safety.
Rambam Health Care Campus, Israel
Year of installation: 2015
Challenge: Rambam Health Care Campus, a 1,000-bed academic hospital in northern Israel, required an effective solution to prevent Legionella bacteria growth in its sanitary hot water systems. Previous attempts with electro-chlorination and chlorine dioxide dosing systems failed to deliver satisfactory ease of use or reliable disinfection levels, particularly in critical departments like Hematology, where patients are most sensitive to infections.
Solution: In 2015, CQM’s SRLB systems were installed in the hospital’s sanitary hot water circuits across three buildings. These systems provide chemical-free, automated disinfection of hot water, ensuring compliance with Israel’s Ministry of Health standards.
Results:
- Zero positive Legionella counts in monthly tests conducted at five random points, including the endpoint of returning hot water, since installation.
- Ease of use and reliable performance led to the installation of three additional SRLB systems in 2019 for new hospital extensions.
- Total satisfaction expressed by hospital administrators.
ASAN Medical Center, South Korea
Year of installation: 2019
Challenge: ASAN Medical Center, a 6-building hospital totaling 400,000 square meters, required an effective solution to prevent Legionella bacteria growth in its sanitary hot water systems.
Solution: In 2019, CQM’s SRLB 2500 SALT system was installed in the hospital’s East Building. The system provides chemical-free, automated disinfection of hot water, using fixed levels of chlorine and power consumption, while keeping the water temperature range of 20°-30°C.
Results:
- The system demolished all bacteria or legionella in the East building’s hot water system.
- The results of no Legionella in the East building led to the installation of 4 additional SRLB systems in 2 other ASAN hospitals’ buildings.
Souraski Medical Center, Israel
Year of installation: 2012
Challenge: Souraski Medical Center, hosting 1,171 beds, needed to avoid Legionella bacteria from the hot shower water system, as well as save energy by reducing the water’s temperature.
Solution: In 2012, CQM’s SRLB system was installed in the hospital’s main building (350 beds), and a 2-year pilot was set, accompanied and inspected by the Israeli Health Department, Souraski Medical Center representatives, and CQM’s engineers.
Results:
- Reducing the temperature (on the return pipe) from 55° to 50° Celsius.
- The hospital saved 270,000 ILS /year (74,000 US$) on energy used for heating.
- No Legionella was found by the Israeli Health Department inspection.
- In 2015, the hospital ordered 3 more CQM SRLB systems.
- In 2017, the hospital installed 2 more CQM SRLB systems.
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