Described herein are solid compositions for water treatment of swimming pools and spas. The solid composition comprises, in a single solid product in the form of a tablet, puck, briquette, a capsule, powder mix or the like, a combined source of a plurality of chemical compounds such as chlorine, algaecide, clarifier and pH adjuster. In embodiments the solid composition comprises at least a combination of (i) a source of chlorine for killing bacteria and (ii) a neutralizer for ensuring a proper pH balance. In embodiments the solid composition is be formulated as a bilayer. In embodiments the solid composition is formulated as a bilayer, a first layer comprising sodium dichloroisocyanurate (NaDCC) and a second layer comprising trichloroisocyanuric acid (TCCA).

Described herein are solid compositions for water treatment of swimming pools and spas. The solid composition comprises, in a single solid product in the form of a tablet, puck, briquette, a capsule, powder mix or the like, a combined source of a plurality of chemical compounds such as chlorine, algaecide, clarifier and pH adjuster. In embodiments the solid composition comprises at least a combination of (i) a source of chlorine for killing bacteria and (ii) a neutralizer for ensuring a proper pH balance. In embodiments the solid composition is be formulated as a bilayer. In embodiments the solid composition is formulated as a bilayer, a first layer comprising sodium dichloroisocyanurate (NaDCC) and a second layer comprising trichloroisocyanuric acid (TCCA).

An improved method for treating ordinary tap water to create an enhanced water composition for watering plants which can remove fluoride and chlorides from the tap water, and finally, to treat the enhanced water composition to provide a preferred pH level that is ideal for growing plants, and particularly medically grown cannabis, in order to enhance the uptake of certain nutrients for these plants.

An improved method for treating ordinary tap water to create an enhanced water composition for watering plants which can remove fluoride and chlorides from the tap water, and finally, to treat the enhanced water composition to provide a preferred pH level that is ideal for growing plants, and particularly medically grown cannabis, in order to enhance the uptake of certain nutrients for these plants.

A water treatment system is provided. The system includes a container holding a reactant liquid within the container. The system further includes an electrode capsule removably retained within the container and submerged in the reactant liquid. The electrode capsule operates to generate reactant gas by operating within the reactant liquid. The system includes a cap releasably coupled to an opening of the container. The cap includes a nozzle that allows flow of reactant gas out of the container to treat an amount of water.

A water treatment system is provided. The system includes a container holding a reactant liquid within the container. The system further includes an electrode capsule removably retained within the container and submerged in the reactant liquid. The electrode capsule operates to generate reactant gas by operating within the reactant liquid. The system includes a cap releasably coupled to an opening of the container. The cap includes a nozzle that allows flow of reactant gas out of the container to treat an amount of water.

A water treatment system is provided. The system includes a container holding a reactant liquid within the container. The system further includes an electrode capsule removably retained within the container and submerged in the reactant liquid. The electrode capsule operates to generate reactant gas by operating within the reactant liquid. The system includes a cap releasably coupled to an opening of the container. The cap includes a nozzle that allows flow of reactant gas out of the container to treat an amount of water. The use of the system operates to treat water for particular applications and controlling pH level range and/or alkalinity for each particular application.

A water treatment system is provided. The system includes a container holding a reactant liquid within the container. The system further includes an electrode capsule removably retained within the container and submerged in the reactant liquid. The electrode capsule operates to generate reactant gas by operating within the reactant liquid. The system includes a cap releasably coupled to an opening of the container. The cap includes a nozzle that allows flow of reactant gas out of the container to treat an amount of water. The use of the system operates to treat water for particular applications and controlling pH level range and/or alkalinity for each particular application.

The disclosure discloses a production method for full resource recycling of sulphate-process titanium dioxide production wastewater. The method comprises the steps: adding sulphate-process titanium dioxide production wastewater neutralized with lime and treatment wastewater obtained by separating gypsum in a filter press into a recycled sodium carbonate solution to precipitate saturated calcium sulfate in the treatment wastewater, clarifying slurry to separate a calcium carbonate precipitate from a sodium sulfate solution, and performing membrane separation on the separated sodium sulfate solution in a membrane filter; and adding lime into the concentrated phase sodium sulfate solution for causticizing reaction, wherein the filtrate is used as a sodium hydroxide solution, carbonizing using a carbon dioxide-containing tail gas produced in the production process of titanium dioxide to obtain a sodium carbonate solution, and then precipitating saturated calcium sulfate in the treatment wastewater again.

The disclosure discloses a production method for full resource recycling of sulphate-process titanium dioxide production wastewater. The method comprises the steps: adding sulphate-process titanium dioxide production wastewater neutralized with lime and treatment wastewater obtained by separating gypsum in a filter press into a recycled sodium carbonate solution to precipitate saturated calcium sulfate in the treatment wastewater, clarifying slurry to separate a calcium carbonate precipitate from a sodium sulfate solution, and performing membrane separation on the separated sodium sulfate solution in a membrane filter; and adding lime into the concentrated phase sodium sulfate solution for causticizing reaction, wherein the filtrate is used as a sodium hydroxide solution, carbonizing using a carbon dioxide-containing tail gas produced in the production process of titanium dioxide to obtain a sodium carbonate solution, and then precipitating saturated calcium sulfate in the treatment wastewater again.