Các thuật ngữ trong ISO (7)
screen
device of rigid bars, mesh, perforated plate or other configurations installed in wastewater systems
Note 1 to entry: Screens are used to collect solids from within wastewater systems to, for example, protect pumps and downstream infrastructure from clogging or blocking.
ISO/TR 24524:2019(en), 3.6
grille
assembly of bars at an environmental exit point from a wastewater transport system to minimise release of solid materials to the environment and exclude entry
Note 1 to entry: In some parts of the world grilles are called grates.
ISO/TR 24524:2019(en), 3.2
plastic
solid material which contains, as an essential ingredient, one or more synthetic organic high polymers and which is formed (shaped) during either manufacture of the polymer or the fabrication into a finished product by heat and/or pressure
[SOURCE: ISO 13617:2001, 3.12, modified — NOTE removed.]
ISO/TR 24524:2019(en), 3.4
discharged material
material deposited into a toilet as a means of disposal
Note 1 to entry: Some solid materials that are discharged will be contaminated with human excreta such as faeces, urine, vomit, menses, blood, saliva and nasal or throat discharges.
Note 2 to entry: Discharges to wastewater transport systems come also from other sanitary equipment such as showers, laundries, kitchen sinks, and industrial and commercial entities.
ISO/TR 24524:2019(en), 3.1
toilet
fixed receptacle into which a person may urinate or defecate, typically consisting of a large bowl connected to a cistern for flushing
Note 1 to entry: Also known as a water closet (WC).
[SOURCE: Adapted from the Oxford English Dictionary. Oxford: OUP; 2018.]
ISO/TR 24524:2019(en), 3.7
microplastics
small pieces of plastic less than five millimetres in diameter
Note 1 to entry: Microplastics can be in the form of a sphere (microbeads), or as fibres or fragments.
[SOURCE: Adapted from Gesamp Reports and Studies No. 90 – Microplastics in the Ocean (2015), p.14.]
ISO/TR 24524:2019(en), 3.3
Reynolds number
<b><i>R</i><sub>e</sub></b>
dimensionless ratio of the inertial flow forces to the viscous forces within a fluid
Note 1 to entry: An indicator of the flow characteristics (laminar or turbulent) of a moving fluid.
[SOURCE: ISO 28520:2009, 3.4]
ISO/TR 24524:2019(en), 3.5