METHOD AND APPARATUS FOR TREATING GEOTHERMAL WATER

Japanese Patent JP2015188850

A

PROBLEM TO BE SOLVED: To provide a method and an apparatus for treating geothermal water, in each of which silica in the geothermal water can be removed satisfactorily and the purity of the silica in the produced sludge can be made higher.SOLUTION: The method for treating geothermal water comprises: a polymerization reaction step of bringing raw water into contact with the returned sludge to polymerize silicic acid in the raw water; an anion polymer addition step of adding an anion polymer to the liquid obtained at the polymerization reaction step; a cation polymer addition step of adding a cation polymer to the liquid obtained at the anion polymer addition step; a solid-liquid separation step of subjecting the liquid obtained at the cation polymer addition step to solid-liquid separation; and a sludge return step of returning at least a part of the sludge separated at the solid-liquid separation step to the polymerization reaction step. The apparatus for treating geothermal water is also provided.

JPH06320169	METHOD AND APPARATUS FOR RECOVERING SILICA IN AQUEOUS SOLUTION
JP2002509802	INDUSTRIAL APPLICABILITY: Water treatment system and water treatment method including pH adjustment
JP3941006	SILICA REMOVING APPARATUS AND METHOD FOR TREATING SILICA-CONTAINING WATER

KUROSU MASAAKI
MURAMATSU YUICHI

JP2014069025A

November 02, 2015

March 28, 2014

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KURITA WATER IND LTD

C02F1/60; C02F1/56; F24J3/08

Tsuyoshi Shigeno

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