The invention relates to a compressed salt block and a liquid treatment apparatus provided therein with at least one such compressed salt block. The liquid treatment apparatus comprises a housing adapted to accommodate at least one liquid treatment tank and at least one compressed salt block. The housing comprises a first space portion for accommodating the at least one liquid treatment tank, and a second space portion for accommodating at least partially the at least one compressed salt block; wherein the at least one compressed salt block comprises an extension portion which extends into a space in the first space portion between an external surface of the at least one liquid treatment tank and an inner wall surface of the housing adjacent the external surface of the at least one liquid treatment tank to thereby position the at least one compressed salt block within the housing. The compressed salt block comprises an elongated body having an irregular cross section, the cross section comprising a base side and a functional side opposing the base side, wherein at least a portion of the functional side forms an acute angle to the base side thereby forming the extension portion of the salt block.

A scale suppression apparatus capable of suppressing in a low-priced manner the generation of silica-based scale and calcium-based scale in the influent water containing at least a silica component and a calcium component, a geothermal power generation system using the same, and a scale suppression method are provided. The scale suppression apparatus includes a chelating agent and alkaline agent addition unit injecting liquid containing a chelating agent and an alkaline agent into a pipe arrangement through which influent water such as geothermal water or the like flows, and a controller controlling a pump and a valve of the chelating agent and alkaline agent addition unit. The controller controls the injection of the chelating agent and the alkaline agent and stops of the injection based on the signal output from a scale detection unit for detecting a precipitation state of the scale.

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 invention relates to an apparatus for the filtration of aqueous liquid that is capable of effectively removing suspended particles from aqueous liquid during a prolonged period of time without clogging of the particulate filter media and associated pressure build-up. This filtration apparatus comprises: ⋅a filtration chamber comprising an inlet opening that is located near the bottom of the filtration chamber, and an outlet opening that is located near the top of the filtration chamber; ⋅a screen covering the outlet opening of the filtration chamber; ⋅a first dosing unit that is located upstream of the filtration chamber adapted to release water-soluble components into the stream of aqueous liquid that flows from the inlet to the filtration chamber; ⋅a particulate filter media that partially fills the interior of the filtration chamber; ⋅a flow regulator that regulates the flow rate of aqueous liquid through the filtration chamber and that can operate in a high flow rate mode or a reduced flow rate mode; ⋅a timer that controls the flow regulator; wherein the timer is programmed to alternatingly switch the flow regulator from the high flow rate mode to the reduced flow rate mode.

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 disclosure provides a silica-based scale cleaning technology. The disclosure can provide a cleaning agent of a silica-based scale, containing a silicic acid compound. The disclosure can also provide a cleaning method of a water treatment apparatus, including: using a solution containing a silicic acid compound. Further, the disclosure can provide a cleaning method of a silica-based scale, including: using an agent containing a silicic acid compound for a water system.

A method for electrolysis-ozone-corrosion inhibitor/electrolysis-ozone-hydrogen peroxide-corrosion inhibitor coupling treatment on toxic and refractory wastewater includes the following steps: adding toxic and refractory wastewater to be treated into a wastewater treatment reaction tank equipped with a plate anode and a plate cathode, and starting a direct current (DC) power supply connected to the plate anode and the plate cathode to treat the toxic and refractory wastewater at an appropriate current density under stirring, during which a corrosion inhibitor and hydrogen peroxide are added to the toxic and refractory wastewater to be treated and ozone is introduced into the toxic and refractory wastewater to be treated through an aeration device. The method can increase the production rate and production quantity of free radicals in a reaction system, effectively improve the treatment efficiency for toxic and refractory wastewater, and reduce the treatment cost.

Disclosed herein is a composition for the treatment of a recirculating water system, comprising: trichloro-s-triazentrione (TCCA) in an amount of from about 75% to about 98% by mass of the composition; an inorganic salt present in an amount of from about 2% to about 25% by mass of the composition; and an auxiliary agent in a total amount of from about 0% to about 10% by mass of the composition. Also disclosed herein is a formed object comprising the composition, a process for preparing the formed object, and a method of using the formed object.

An apparatus for inhibiting formation of calcium based crystal, in which formation of calcium based crystals is inhibited by adding an optimal amount of magnesium to raw water having a high concentration of calcium ions and a high variation in calcium ion concentration and an apparatus for water treatment using the same.

A process including introducing, into a device, an aqueous fluid containing at least one inorganic salt, the water of the aqueous fluid being in supercritical conditions or close to the supercritical range in the device, and measuring the concentration or the amount of inorganic salt in the device, this measurement preferably being carried out before the entry of the inorganic salt into the device, Then bringing the inorganic salt into contact with an aqueous flow containing at least one hydroxide salt to obtain in the device an aqueous fluid mixture containing an inorganic salt and a hydroxide salt and adjusting the concentration or amount of the hydroxide salt as a function of the concentration or amount of the inorganic salt needed to at least partially solubilize the inorganic salt. Preferably the measurement of the concentration or the amount of inorganic salt leaving the device is also performed.