ISO 16075-5:2021 灌漑プロジェクトでの処理済み廃水使用のガイドライン—パート5：処理済み廃水消毒および同等の処理 | ページ 6

3.1.1

advanced oxidation process

AOP

process that generates hydroxyl radicals in sufficient quantity to remove organics by oxidation

3.1.2

ballast

unit inserted between the supply and one or more discharge lamps, which by means of inductance, capacitance, or a combination of inductance and capacitance, serves mainly to limit the current of the lamp(s) to the required value so as to convert and regulate incoming power to UV lamps to produce UV light

Note 1 to entry: The ballast provides the proper voltage and current required to initiate and generate UV photons.

3.1.3

fouling

process leading to deterioration of membrane flux due to surface or internal blockage of the membrane

Note 1 to entry: See AWWA B130-13^[1].

3.1.4

pore size

size of the opening in a porous membrane

Note 1 to entry: Pore sizes are expressed either as nominal (average) or absolute (maximum), typically in terms of μm.

Note 2 to entry: See in AWWA B130-13^[1].

3.1.5

reduction equivalent dose

RED

dose of UV in a given device which is determined by biodosimetry

Note 1 to entry: See UV dose (3.1.9) and “biodosimetry”

Note 2 to entry: This UV dose (3.1.9) is determined by measuring the inactivation of a challenge microorganism after exposure to UV light in a UV unit and comparing the results to the known UV dose response curve of the same challenge organism determined via Bench scale collimated beam testing.

3.1.6

ultrafiltration

UF

Note 1 to entry: pressure driven process employing semipermeable membrane under hydraulic pressure gradient for the separation components in a solution

Note 2 to entry: The pores of the membrane are of a size smaller than 0.1μm, which allows passage of the solvent(s) but will retain non-ionic solutes based primarily on physical size, not chemical potential.

Note 3 to entry: See in ASTM D6161-10.

3.1.7

UV disinfection system

combination of UV disinfection units (3.1.8) with associated controls and instrumentation

3.1.8

UV disinfection unit

independent combination of single or multiple bank(s) in series with a common mode of failure (e.g., electrical, cooling, cleaning system, etc.)

3.1.9

UV dose

UV fluence

amount of UV energy given as the time integral of the fluence rate or irradiance (W/m²)

Note 1 to entry: This is given in units of mJ/cm² or J/m²

3.1.10

UV intensity sensor

UV irradiance meter or radiometer instrument to measure UV irradiance

3.1.11

UV transmittance

fraction of photons in the UV spectrum transmitted through a material such as water or quartz

Note 1 to entry: It is preferable that an online UVT sensor be installed and used to verify UVT.

Note 2 to entry: The wavelength of the UVT (%) should be specified, often using a path length of 1 cm. The measurement is calibrated compared to ultra pure water (ISO 3696 grade 1 or equivalent).

Note 3 to entry: UVT is related to the UV absorbance (A) by the following formula (for a 1 cm path length): % UVT = 100 × 10^-A .