A system and method for generating base water and precipitate, including combining produced water with seawater to precipitate barium sulfate from barium in the produced water and from sulfate in the seawater, and separating the precipitate to give the base water and the precipitate. The base water may have less than a specified amount of sulfate and be utilized for hydraulic fracturing fluid. The precipitate may give a weighting agent for drilling.

An automatic rainwater collection system, with a high degree of autonomy and sensitivity, which allows the collection and use of rainwater, in open spaces, areas of difficult access and/or lacking of water extraction systems, as well as in domestic spaces such as gardens or roofs, without additional adaptations for its use and which works with solar energy. The automatic rainwater collection system is conformed by: a flower-shaped obturable rainwater receiving element, which comprises: a plurality of internal petals and a plurality of external petals that can be opened or closed in an automated manner, a sensor with high sensitivity to droplet impacts and/or relative humidity, which is operatively connected to a motor to control the opening and closing of the plurality of petals of the rainwater receiving element; a support frame, which functions as a support for the obturable rainwater receiving element and as a water storage media; a modular system for filtering water, connected to said central media of water accumulation, which comprises a plurality of filtering modules, which provide different filtering options depending on the quantity and combination thereof in order to obtain different qualities of water for use in several activities; and a water storage media, which further functions as base and support of the collection system.

An automatic rainwater collection system, with a high degree of autonomy and sensitivity, which allows the collection and use of rainwater, in open spaces, areas of difficult access and/or lacking of water extraction systems, as well as in domestic spaces such as gardens or roofs, without additional adaptations for its use and which works with solar energy. The automatic rainwater collection system is conformed by: a flower-shaped obturable rainwater receiving element, which comprises: a plurality of internal petals and a plurality of external petals that can be opened or closed in an automated manner, a sensor with high sensitivity to droplet impacts and/or relative humidity, which is operatively connected to a motor to control the opening and closing of the plurality of petals of the rainwater receiving element; a support frame, which functions as a support for the obturable rainwater receiving element and as a water storage media; a modular system for filtering water, connected to said central media of water accumulation, which comprises a plurality of filtering modules, which provide different filtering options depending on the quantity and combination thereof in order to obtain different qualities of water for use in several activities; and a water storage media, which further functions as base and support of the collection system.

A water treatment system includes: EDI having deionization chamber that deionizes water that contains boron and concentration chambers in which concentrated water flows; and a cooler to cool the water supplied to deionization chamber or the concentrated water supplied to concentration chambers. Alternatively, water treatment system includes EDI having deionization chamber that deionizes water that contains boron, concentration chambers in which concentrated water flows, and electrode chambers in which electrode water flows; a cooler that adjusts temperature of the water or temperature of the concentrated water supplied to concentration chamber; and a controller that controls the cooler such that the cooler adjusts the temperature of the water supplied to deionization chamber or the temperature of the concentrated water supplied to the concentration chambers within a range of 10-23° C., based on the temperature of the water, temperature of treated water of EDI, the temperature of the concentrated water, or temperature of the electrode water.

A water treatment system comprises a source of water including one or more contaminants, an electrocoagulation cell including a housing defining a fluid flow conduit, an anode disposed within the fluid flow conduit, and a cathode disposed within the fluid flow conduit, the housing including an inlet fluidly connectable to the source of water and an outlet, a solids/liquid separation system having an inlet fluidly connectable to the outlet of the housing of the electrocoagulation cell, a solids-rich outlet, and a solids-lean outlet, and a ballast feed system configured to deliver a ballast to the solids/liquid separation system.

A filter includes a porous molded article, which is a sintered material of mixed powder containing activated carbon powder and thermoplastic resin powder. When water having a specific electrical resistance value of 18 MΩ.Math.cm or greater is caused to pass through the filter at a space velocity of 1200 hr.sup.−1, a specific electrical resistance value of the water after being caused to pass through the filter is 13 MΩ.Math.cm or greater. To provide a filter capable of efficiently removing metal ions in a treatment liquid and capable of easily obtaining a solution having an extremely low metal ion content.

A disinfection system for treating water. In a specific example, the system treats water prior to its upload to an aircraft or other passenger transportation vehicle. One or more replaceable filters are positioned within a filter chamber housing in order to expose water flowing through the system to filtration treatment.

A system for signaling and/or displaying a depletion condition of a filter cartridge in a water treatment device by means of filtration with replaceable cartridges. The filter cartridge including an identification code which identifies the cartridge and which can be read by means of an optical reader of a portable electronic device. The portable electronic device includes a programmable control interface which can be displayed on a screen of the portable electronic device, by means of which it is possible to acquire identification data of the cartridge, to modify one or more predefined or previously imposed parameters in relation to the conditions of use of the cartridge, and to display the effective duration of the cartridge.

A system for signaling and/or displaying a depletion condition of a filter cartridge in a water treatment device by means of filtration with replaceable cartridges. The filter cartridge including an identification code which identifies the cartridge and which can be read by means of an optical reader of a portable electronic device. The portable electronic device includes a programmable control interface which can be displayed on a screen of the portable electronic device, by means of which it is possible to acquire identification data of the cartridge, to modify one or more predefined or previously imposed parameters in relation to the conditions of use of the cartridge, and to display the effective duration of the cartridge.

A metal-chelating resin includes (a) a compound represented by Formula (I):

##STR00001##

or a stereoisomeric form thereof or a salt thereof, wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.a, R.sup.b, R.sup.c and R.sup.d are as defined herein; and (b) an organic polymer resin having at least one complementary reactive functional group covalently linked with at least one linking group of the compound represented by Formula (I).