A PROCESS FOR THE TREATMENT OF EFFLUENT STREAMS

This invention relates to a process for removing sulphates and calcium from a water stream which comprises the steps of: combining the water stream and an amount of amorphous aluminium trihydroxide (Al(OH3)); allowing the formation of ettringite (3CaO.Al2O3CaSO4.31/32H2O) as a precipitate; and remov...

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Bibliographische Detailangaben
1. Verfasser:	RAMSAY, JAMES IAN
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	CHEMISTRY METALLURGY TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Online-Zugang:	Volltext bestellen
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Beschreibung
Zusammenfassung:	This invention relates to a process for removing sulphates and calcium from a water stream which comprises the steps of: combining the water stream and an amount of amorphous aluminium trihydroxide (Al(OH3)); allowing the formation of ettringite (3CaO.Al2O3CaSO4.31/32H2O) as a precipitate; and removing the precipitated ettringite from the water stream.