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US 11,440,821 B2Granted
Water-purifying agent and water purification method
AssigneeDexerials Corporation
InventorsMasahiko Ito, Ryu Shimada, Takanori Fujita
Life of this patent
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Abstract
Provided is a water-purifying agent formed of a granulated product including a mixture of a plant powder and a polymeric flocculant, wherein a surface of the granulated product includes a coated portion in which the plant powder is coated with the polymeric flocculant and a non-coated portion in which the plant powder is not coated with the polymeric flocculant.
Claims11
A method of producing a water-purifying agent, the water-purifying agent comprising a granulated product that comprises a mixture of a plant powder and a polymeric flocculant, the method comprising:
- mixing the plant powder and the polymeric flocculant and kneading the plant powder and the polymeric flocculant with addition of moisture using a mixer, to obtain a kneaded product;
- shaping the kneaded product into a sheet shape by a stretching method using a roller, to obtain a sheet-shaped product;
- drying the sheet-shaped product, to obtain a dried sheet;
- and
- pulverizing the dried sheet to obtain the granulated product.
2 more elements
A water purification method, comprising:
- preparing a water-purifying agent, wherein the water-purifying agent comprises a granulated product, wherein the water purifying agent is prepared by the steps of:
- a) mixing the plant powder and the polymeric flocculant and kneading the plant powder and the polymeric flocculant with addition of moisture using a mixer to obtain a kneaded product:
- b) shaping the kneaded product into a sheet shape by a stretching method using a roller to obtain a sheet-shaped product;
- c) drying the sheet-shaped product to obtain a dried sheet;
- and
- d) pulverizing the dried sheet to obtain the granulated product;
- and
- feeding a dispersion liquid of the water-purifying agent which contains the granulated product to wastewater including an inorganic unnecessary substance to remove the inorganic unnecessary substance in the wastewater,
- wherein the wastewater is wastewater including the inorganic unnecessary substance that contains at least any one of nickel, fluorine, iron, copper, zinc, chromium, arsenic, cadmium, tin, and lead.
6 more elements
Dependencies are inferred from the claim text.