SYSTEM FOR REMOVING PHOSPHORUS FROM WASTE WATER

Phosphate-contaminated water passes through a domestic sewage treatment system, in which oxidation of the ammonium progresses far enough t o cause a lowering of the pH to 5 or less. The water is passed over sand grain s coated with aluminum hydroxide (gibbsite). Enough Al3+ ions enter solution, at t...

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Bibliographische Detailangaben
1. Verfasser:	ROBERTSON, WILLIAM DEAN
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	CHEMISTRY GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS METALLURGY TECHNICAL SUBJECTS COVERED BY FORMER USPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Beschreibung
Zusammenfassung:	Phosphate-contaminated water passes through a domestic sewage treatment system, in which oxidation of the ammonium progresses far enough t o cause a lowering of the pH to 5 or less. The water is passed over sand grain s coated with aluminum hydroxide (gibbsite). Enough Al3+ ions enter solution, at the low pH, to cause all the phosphate-P to precipitate as aluminum phosphate, a nd nothing else precipitates other than the aluminum phosphate.