Table 1. Characteristics of the UV-C reactor and measurement parameters using the spectroradiometric method

Characteristics	Value
Power of UV-C lamp	48 W (140 V)
Tube length of UV-C lamp	1,148 mm
Outlet diameter (Do)	26 mm
Inlet diameter (Di)	22.2 mm
Fluid flow space gap between UV lamps and sleeves	1.9 mm
UV radiation source	Low-pressure Hg lamp
Peak wave length	253.74 nm
UV-C transmittance of the quartz tube	82.35%
UV-C irradiance at the distance of 1.9 mm1)	(221.8±22.2) mWcm2

Output data that integrated and exported from the software SpecwinPro^® (Instrument Systems, Munich, Germany).
UV-C, ultraviolet-C.