Updating international standards for pharmaceutical waters
Greywater may also be used for toilets or irrigation.
The change will align EP requirements closely with USP WFI production methods opening opportunities for membrane based systems.
Typically in developed countries, tap water meets drinking water quality standards, even though only a small proportion is actually consumed or used in food preparation.
Other typical uses include washing, toilets, and irrigation.
Phosphorite contains calcium phosphate mixed with limestone (calcium carbonates) minerals and apatite—a mineral with high phosphate and fluoride content.
It is refluxed (heated) with sulfuric acid to produce a phosphoric acid-gypsum (calcium sulfate-Ca SO4) slurry.