To provide a hydrogen-containing water product which maintains the oxidation-reduction potential at a low value even when a certain period of time elapses after manufacture.

A hydrogen-containing water product for beverage including: a packaging container with a straw having a sealing cap attached to an opening; hydrogen-containing water filled in the container under pressure; and a gas atmosphere that is generated in a space above the hydrogen-containing water in the container by a heat treatment conducted after the filling under pressure and is present even when at least 90 days elapse after generation, wherein the hydrogen-containing water has an oxidation-reduction potential of {[−59×(pH value of hydrogen-containing water in hydrogen-containing water product for beverage after elapse of 90 days)]−170} mV or less when being stored at normal temperature for at least 90 days after manufacture.

The present disclosure provides a method for relieving a corrosive environment of a boiling water reactor, the method including a step of injecting hydrogen and a noble metal compound into water to be replenished into the reactor pressure vessel during a period of a generating operation of a boiling water nuclear power plant including the reactor pressure vessel. In the method, the hydrogen is injected into water to be supplied into the reactor pressure vessel, and the noble metal compound is injected into water in a line of the boiling water nuclear power plant in which a concentration of oxygen or hydrogen peroxide is stoichiometrically higher than the concentration of hydrogen at which hydrogen undergoes a chemical reaction to turn to water. Thus, when a noble metal is injected into a boiling water reactor, the noble metal can be restrained from adhering onto a pipe for an injection and other pipes, and thereby can increase the amount of the noble metal to be injected into a cooling water in a reactor pressure vessel.

The invention relates to a method for nitrogen removal from aqueous medium, comprising steps of (a) converting NH.sub.4.sup.+ in the aqueous medium to NO.sub.2.sup.− by partial aerobic nitrification, (b) partially reducing the obtained NO.sub.2.sup.− to N.sub.2O in anoxic conditions, and (c) decomposing N.sub.2O to N.sub.2 with energy recovery. A mixture of ferrous sulfate and ferric sulfate is used in step (b) for reduction of NO.sub.2.sup.− to N.sub.2O.

The invention relates to a method for nitrogen removal from aqueous medium, comprising steps of (a) converting NH.sub.4.sup.+ in the aqueous medium to NO.sub.2.sup.− by partial aerobic nitrification, (b) partially reducing the obtained NO.sub.2.sup.− to N.sub.2O in anoxic conditions, and (c) decomposing N.sub.2O to N.sub.2 with energy recovery. A mixture of ferrous sulfate and ferric sulfate is used in step (b) for reduction of NO.sub.2.sup.− to N.sub.2O.

A system and method treat oilfield produced water by two-stages of hazardous sulfide treatments. In an embodiment, a two-stage oil and gas field produced water treatment system includes an oil removal vessel. The oilfield produced water is introduced to the oil removal vessel. The oil removal vessel removes a portion of the hydrocarbons from the oilfield produced water to provide a reduced oil produced water. In addition, the system includes an iron sponge. The reduced oil produced water is introduced to the iron sponge, and the iron sponge removes a portion of the hazardous sulfides from the reduced oil produced water to provide a reduced sulfide produced water. The system also includes a stabilized sodium percarbonate solution. The stabilized sodium percarbonate solution is mixed with the reduced sulfide produced water to remove a portion of the hazardous sulfides from the reduced sulfide produced water to provide a treated produced water.

A system and method treat oilfield produced water by two-stages of hazardous sulfide treatments. In an embodiment, a two-stage oil and gas field produced water treatment system includes an oil removal vessel. The oilfield produced water is introduced to the oil removal vessel. The oil removal vessel removes a portion of the hydrocarbons from the oilfield produced water to provide a reduced oil produced water. In addition, the system includes an iron sponge. The reduced oil produced water is introduced to the iron sponge, and the iron sponge removes a portion of the hazardous sulfides from the reduced oil produced water to provide a reduced sulfide produced water. The system also includes a stabilized sodium percarbonate solution. The stabilized sodium percarbonate solution is mixed with the reduced sulfide produced water to remove a portion of the hazardous sulfides from the reduced sulfide produced water to provide a treated produced water.

Hydrophobically modified Si-containing polyamines are useful for treating scale in industrial process streams. Preferred hydrophobically modified Si-containing polyamines are particularly useful for treating aluminosilicate scale in difficult-to-treat industrial process streams, such as in the Bayer alumina process streams, nuclear waste streams and kraft paper mill effluent streams.

Hydrophobically modified Si-containing polyamines are useful for treating scale in industrial process streams. Preferred hydrophobically modified Si-containing polyamines are particularly useful for treating aluminosilicate scale in difficult-to-treat industrial process streams, such as in the Bayer alumina process streams, nuclear waste streams and kraft paper mill effluent streams.

To provide a portable hydrogen-water generating pot that can generate highly concentrated drinkable hydrogen water anytime and anywhere in a short amount of time by using not only drinking water but also water or liquids, such as coffee, that have water as their major ingredient as raw water, wherein the portable hydrogen-water generating pot comprises a vessel's main body 1 made of a transparent cylindrical member 1a etc.; a fixed-quantity water supply means 2 provided in the lower part's upper layer block 1b located in the lower part of the vessel's main body, the fixed-quantity water supply means 2 supplying a certain quantity of water contained in the vessel's main body 1 to a chemical tank 6 created in the lower lid 1c of the lower part; a gas passage 4, equipped with a check valve 3, also provided in the lower part's upper layer block 1b, the gas passage 4 allowing hydrogen gas generated in the chemical tank 6 to move to the vessel's main body 1; a chemical tank 6, for containing a hydrogen-generating agent 5, arranged in the lower lid 1c that forms the lower layer of the lower part of the vessel's main body 1; an upper part block that forms the discharge port part 7 located in the upper part of the vessel's main body 1; and a lid 9, equipped with a pressure reducing valve 8, detachably and externally attached to the discharge port part 7.

To provide a portable hydrogen-water generating pot that can generate highly concentrated drinkable hydrogen water anytime and anywhere in a short amount of time by using not only drinking water but also water or liquids, such as coffee, that have water as their major ingredient as raw water, wherein the portable hydrogen-water generating pot comprises a vessel's main body 1 made of a transparent cylindrical member 1a etc.; a fixed-quantity water supply means 2 provided in the lower part's upper layer block 1b located in the lower part of the vessel's main body, the fixed-quantity water supply means 2 supplying a certain quantity of water contained in the vessel's main body 1 to a chemical tank 6 created in the lower lid 1c of the lower part; a gas passage 4, equipped with a check valve 3, also provided in the lower part's upper layer block 1b, the gas passage 4 allowing hydrogen gas generated in the chemical tank 6 to move to the vessel's main body 1; a chemical tank 6, for containing a hydrogen-generating agent 5, arranged in the lower lid 1c that forms the lower layer of the lower part of the vessel's main body 1; an upper part block that forms the discharge port part 7 located in the upper part of the vessel's main body 1; and a lid 9, equipped with a pressure reducing valve 8, detachably and externally attached to the discharge port part 7.