Research Center

System performance is verified under diverse conditions of water quality, water temperature, type of miroorganism, bacterial count, etc. to maintain the high reliability of our UV systems.

Measurements for bacterial/fungal count and pH, ion and organic mass spectrometry, etc.

System designs for optimized performance are made by analyzing the flow patterns of water and calculating the average UV dose inside a UV chamber by utilizing a CFD simulation tool.

Any necessary water quality tests and analyses are performed to make proper selections from our product line-up for our customers. Also, we provide water quality tests and analyses as a post-installation service to make sure if the quality of water is maintained appropriately.

● Analyzable items

● Types of water subject to analysis

Ultrapure water, industrial water, cooling water, seawater, swimming pool water, aquaculture water, drinking water, sewage water, industrial waste water, etc.

Detailed measurements can be performed for UV lamps and electronic ballasts, which act as the heart of a UV system.

● UV lamp measurement system

We use an automated measuring system with computer-based consolidated control and management function for UV output, electrical properties of UV lamps and electronic ballasts, dimming function configuration, UV lamp temperature, water temperature, ambient temperature etc. Temperature, start-up, and lifetime characteristics of UV lamps can be accurately measured.

● Absolute UV intensity

Our Research Center implements strict management of UV intensity by having a duplicate of the standard light source of the National Institute of Advanced Industrial Science and Technology (AIST) , which is in conformity to the standard light source of the National Institute of Standards and Technology (NIST) and the National Physical Laboratory (NPL). Therefore, all UV output measurement data we take are shown in absolute UV intensities traceable to AIST.

Detailed performance tests and evaluations are performed against our STERITRON and FLONLIZER series under various conditions, using the UV lamp measurement system described above and an inline UV disinfection test equipment (shown in the picture) with maximum flow rate of 300m3/hr. Also, the facility is used by our customers for quality inspection and performance verification of our UV systems before delivery.

● Evaluatable models

All models of STERITRON and FLONLIZER

● Areas for evaluation

Germicidal performance, effective UV dose of each model, surface temperature of UV lamp, etc.

● Target for disinfection

E.coli, Bacillus subtilis, yeasts, fungi, etc.

Reaction kinetic analysis for the target substance (bacteria) is the most fundamental and important factor when designing a UV disinfection system or a photochemical reaction system, such as the calculation of reaction rate coefficients for the target substance in case of photochemical reaction (TOC reduction, bleaching, etc.) and the calculation of inactivation rate coefficients for the target bacteria in case of disinfection. Although these values can be obtained by a lab scale reactor, parameters such as concentration, temperature, transmittance, agitation speed, etc. need to be set precisely to adjust the values for actual use.

At our Research Center, we make highly accurate measurements by inactivation tests for various bacteria inside a clean bench, advanced oxidation batch reaction tests, electrical characteristics measurements using a potable lamp measurement system. Also, we can do quick analysis for water samples taken at our customer's manufacturing line.

We are capable of accurately analyzing flowing conditions inside the UV reactor and calculating effective UV dose to be radiated onto the target bacteria by utilizing CFD-aided simulations and tailored computer programs for optimum UV dose. The best positions for UV lamps can be obtained to optimize the UV system's disinfection performance.

Also, we can calculate the reaction rate and the disinfection rate for an arbitrary UV system structure, flow rate, and transmittance for substances and bacteria with known reaction rate coefficient and inactivation rate coefficient by the aforementioned method.

We implement rigorous control and management in accordance with the test methods of GMP microbiology for storage conditions, cultivation conditions, number of propagation, etc. to fix and stabilize the UV resistance.