Method for recovery of phosphate from a liquid phase

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United States of America Patent

PATENT NO 9816191
SERIAL NO

14686924

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Abstract

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Known phosphorus recovery methods from liquid phases proceed from the presence of ammonia or nitrate, and phosphate, in the liquid phase. Wastewater that is supposed to be freed of nitrate and phosphate pollution in sewage treatment facilities can be used as the liquid phase. In electrochemical methods, a magnesium electrode is used as a sacrificial anode, and ammonium and phosphate together are bound to the magnesium to form struvite, which in turn can be used in agriculture as a fertilizer, in useful manner. In an alternative method of procedure, first, only phosphates are removed from a liquid phase that occurs from the filtration of products of hydrothermal carbonization. A magnesium electrode is used as the cathode, so that the resulting magnesium phosphate does not go into solution and first must be precipitated, but rather is removed from the electrolysis cell directly with the cathode, after the reaction occurs.

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Patent Owner(s)

Patent OwnerAddress
AVA-CO2 SCHWEIZ AGBAARERSTRASSE 20 ZUG 6304

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Badoux, François Rotkreuz, CH 2 2
Kusche, Stepan Karlsruhe, DE 3 0
Vyskocil, Jan Zug, CH 9 13

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