A scale inhibiting agent having silicon dioxide (SiO.sub.2) and sodium oxide (Na.sub.2O) as main components is put into each of a circulation flow channel in a hot water circulation system and a circulation flow channel in a cooling water circulation system. On the other hand, a solid-liquid separation device is installed at an appropriate position of each of the circulation flow channel in the hot water circulation system and the circulation flow channel in the cooling water circulation system, the solid-liquid separation device storing a lot of filter mediums each of which is provided with a lot of rectangular water stream inlets in a staggered pattern along a peripheral direction, is provided with a semicircularly curved water stream control plate extending inward from a short side in one side of each of the water stream inlets and has a diameter of 12 mm and a length of 12 mm.

A method for removing scale that is precipitated from geothermal fluid containing dissolved silica and becomes adherent in a geothermal power plant including: a water supply pump for pumping the geothermal fluid from a production well; a gas-water separator for separating the geothermal fluid into geothermal water and geothermal steam; and a turbine for rotating by being supplied with the geothermal steam separated by the gas-water separator includes: forming a surface of a location in the geothermal power plant contacted by the geothermal fluid from diamond-like carbon in a first region extending from the production well to the turbine; forming at least the surface of the location in the geothermal power plant from at least one selected from diamond-like carbon, polytetrafluoroethylene, and polyvinyl chloride in a region other than the first region; and injecting a scale removing liquid into a flow path including the surface of the location.

A process for removing silica and reducing total hardness of a natural or waste water containing silica and scale-forming ions comprises adding (i) magnesium hydroxide or a precursor of magnesium hydroxide and (ii) a soluble aluminate compound or a precursor of aluminate to said water while maintaining the pH of said stream at pH>8 to produce a layered double hydroxide in situ, wherein the layered double hydroxide contains the scale-forming ions in a lattice of the layered double hydroxide and silica is incorporated in the lattice of the layered double hydroxide as an interlayer anion and/or bound by the layered double hydroxide via one or more binding modes, wherein the process further comprises a recycling and regeneration step and/or a hydroxide addition step.

The present disclosure relates, in part, to enhanced weathering systems and/or apparatuses and methods of use thereof. In one aspect, the present disclosure provides a method of at least partially sequestering CO.sub.2 from an influent aqueous solution comprising aqueous and/or gaseous CO.sub.2. In another aspect, the present disclosure provides a method of at least partially sequestering CO.sub.2 from a gaseous CO.sub.2 source. In another aspect, the present disclosure provides systems and/or apparatuses suitable for use in the methods described herein. In another aspect, the present disclosure provides a method of optimizing the design and operation of a system for at least partial sequestration of CO.sub.2 from a water source.

The present disclosure relates, in part, to enhanced weathering systems and/or apparatuses and methods of use thereof. In one aspect, the present disclosure provides a method of at least partially sequestering CO.sub.2 from an influent aqueous solution comprising aqueous and/or gaseous CO.sub.2. In another aspect, the present disclosure provides a method of at least partially sequestering CO.sub.2 from a gaseous CO.sub.2 source. In another aspect, the present disclosure provides systems and/or apparatuses suitable for use in the methods described herein. In another aspect, the present disclosure provides a method of optimizing the design and operation of a system for at least partial sequestration of CO.sub.2 from a water source.