Abstract: Disclosed is a system for producing magnesium hydroxide including: a generation unit; and a recovery unit connected to the generation unit, wherein the generation unit has a reaction tank in which a calcium hydroxide slurry is added to water to be treated containing magnesium ions to crystallize magnesium hydroxide and to obtain a reaction slurry containing particles of magnesium hydroxide, and a sedimentation tank in which the reaction slurry is reserved to sediment the particles and to separate the reaction slurry into a separation slurry containing the particles at a high concentration and a separation liquid containing the particles at a low concentration, and wherein, in the recovery unit, an alkaline aqueous solution is added to the separation liquid to crystallize magnesium hydroxide and to obtain the reaction slurry and then the reaction slurry is reserved to sediment the particles and to recover the sedimented particles.

Abstract: A system for producing magnesium chloride includes a removal unit, and a concentration unit that is connected to the removal unit. The removal unit generates feedstock water by removing sulfate ions and sodium ions from treatment target water having seawater as a feedstock. The concentration unit generates a slurry in which magnesium chloride is crystallized by concentrating the feedstock water. The removal unit has a first removal unit which reduces the sulfate ion concentration compared to the sulfate ion concentration in the treatment target water, and a second removal unit which reduces the sodium ion concentration compared to the sodium ion concentration in the treatment target water.

Abstract: A system for producing a magnesium chloride aqueous solution includes a crystallization unit configured to generate reaction slurry in which particles of magnesium hydroxide are dispersed by adding a sodium hydroxide aqueous solution to water to be treated, a precipitation unit configured to store reaction slurry, precipitate particles and separate the reaction slurry into recovered slurry and a separated liquid, a removal unit configured to remove divalent cations from the water to be treated or the separated liquid to generate a reaction liquid, an acid-alkali generation unit configured to generate a sodium hydroxide aqueous solution and hydrochloric acid from the reaction liquid, and a reaction unit configured to generate a magnesium chloride aqueous solution by adding hydrochloric acid to the recovered slurry. The acid-alkali generation unit has a main body section configured to generate a sodium hydroxide aqueous solution and hydrochloric acid from the reaction liquid.

Abstract: It provides a reinforcing bar binding machine capable of surely wrapping and binding a wire to a binding object. The reinforcing bar binding machine includes a magazine in which two wires are housed so as to be drawable, a curl guide unit which winds the arranged wires around the reinforcing bar, by the operation of feeding the parallel wires at the curl guide unit to wind around the reinforcing bar, a wire feeding unit which to wrap around the reinforcing bar with the wires wound around the reinforcing bar, and a binding unit which twists a intersecting portion between one end side and the other end side of the wire wound around the reinforcing bar.

Abstract: It provides a reinforcing bar binding machine capable of surely wrapping and binding a wire to a binding object. The reinforcing bar binding machine (1A) includes a magazine (2A) in which two wires (W) are housed so as to be drawable, a curl guide unit (5A) which winds the arranged wires (W) around the reinforcing bar (S), by the operation of feeding the parallel wires (W) at the curl guide unit (5A) to wind around the reinforcing bar (S), a wire feeding unit (3A) which to wrap around the reinforcing bar (S) with the wires (W) wound around the reinforcing bar (S), and a binding unit (7A) which twists a intersecting portion between one end side and the other end side of the wire (W) wound around the reinforcing bar (S).

Abstract: It provides a reinforcing bar binding machine capable of surely wrapping and binding a wire to a binding object. The reinforcing bar binding machine (1A) includes a magazine (2A) in which two wires (W) are housed so as to be drawable, a curl guide unit (5A) which winds the arranged wires (W) around the reinforcing bar (S), by the operation of feeding the parallel wires (W) at the curl guide unit (5A) to wind around the reinforcing bar (S), a wire feeding unit (3A) which to wrap around the reinforcing bar (S) with the wires (W) wound around the reinforcing bar (S), and a binding unit (7A) which twists a intersecting portion between one end side and the other end side of the wire (W) wound around the reinforcing bar (S).

Abstract: The reinforcing bar binding machine which is capable of surely wrapping and binding a wire to a binding object. The reinforcing bar binding machine includes a magazine in which two wires are housed so as to be drawable, a curl guide unit which winds the arranged wires around the reinforcing bar, by the operation of feeding the parallel wires at the curl guide unit to wind around the reinforcing bar, a wire feeding unit which feeds the wires so that they are wound around the reinforcing bar, and a binding unit which twists an intersecting portion between one end side and the other end side of the wires wound around the reinforcing bar.

Abstract: This water treatment system is provided with: a reverse osmosis membrane device; a biofilm treatment device that has a carrier, on a surface of which is formed a biofilm, and that treats water to be treated before the water to be treated is transmitted through the reverse osmosis membrane device; and at least one of a water to be treated stoppage period circulation means and a water to be treated stoppage period supply means that are driven when the intake of new water to be treated is stopped. The water to be treated stoppage circulation means supplies and circulates water to be treated from a water to be treated discharge outlet side of the biofilm treatment device to a water to be treated supply port side. The water to be treated stoppage period supply means supplies new water to be treated to the biofilm treatment device.

Abstract: A water treatment system 10A for treating waste water 31 discharged from a plant facility includes: a water treatment facility 50 in which the waste water 31 is treated; a first operation data acquisition unit 41 which acquires plant operation information from the plant facility; a water quality estimation unit 42 which estimates the water quality of the waste water 31 on the basis of the plant operation information 40 that has been acquired by the first operation data acquisition unit 41; and a control unit 44 which performs feed forward control over an operation condition for the water treatment facility 50 on the basis of estimated water quality 43 that has been estimated by the water quality estimation unit 42.

Abstract: The reinforcing bar binding machine which is capable of surely wrapping and binding a wire to a binding object. The reinforcing bar binding machine includes a magazine in which two wires are housed so as to be drawable, a curl guide unit which winds the arranged wires around the reinforcing bar, by the operation of feeding the parallel wires at the curl guide unit to wind around the reinforcing bar, a wire feeding unit which feeds the wires so that they are wound around the reinforcing bar, and a binding unit which twists an intersecting portion between one end side and the other end side of the wires wound around the reinforcing bar.

Abstract: An industrial waste water treatment system is provided. The industrial waste water treatment system includes: a buffer tank that temporarily receives and stores industrial estate waste water; a primary treatment unit that performs a primary treatment on effluent water from a buffer tank; an activated sludge treatment apparatus that is a secondary treatment unit that performs a secondary treatment using activated sludge on influent water that has been treated by the primary treatment unit; an organic matter concentration measurement unit that measures an organic matter concentration in the industrial estate waste water flowing into the buffer tank; and an activator dispensing unit that dispenses, into the secondary treatment unit, an activator that activates microorganisms included in the activated sludge of the activated sludge treatment apparatus.

Abstract: Provided are a water treatment apparatus and a water treatment method capable of performing a significant water quality evaluation of treated water before the filtration process, and capable of rapidly responding to a change in water quality of the treated water. A water treatment apparatus of the present invention includes a treated water filtering unit which filters treated water supplied from a treated water line to become filtered water, a filtered water mixing unit which is provided in a treated water extraction line diverging from the treated water line to reduce a turbidity concentration in the treated water of the treated water extraction line to become measured water, and a water quality measuring unit which is provided at a rear stage of the filtered water mixing unit in the treated water extraction line and measures water quality of the measured water to evaluate the water quality of the treated water.

Abstract: A natural water treatment control apparatus (190) controls a treatment device configured to perform treatment used to contribute to purification of drawn natural water. The natural water treatment control apparatus (190) includes: a tide information acquiring unit (191) configured to acquire tide information serving as information associated with tides of a body of water from which the natural water is drawn; and a treatment mode determining unit (193) configured to determine a treatment mode of the treatment device on the basis of the tide information.

Abstract: This water treatment system comprises: a reverse osmosis device (2); a biofilm treatment device (4) that has a media on the surface of which a biofilm is formed and that treats water to be treated (3) before passing through the reverse osmosis device (2); an oxidizing agent addition device (5) that adds an oxidizing agent to the water to be treated (3) at a stage before treatment with the biofilm treatment device (4) or adds an oxidizing agent to the water to be treated (3) at a later stage after treatment with the biofilm treatment device (4) and before treatment with the reverse osmosis device (2); and a reducing agent addition device (6) that neutralizes the oxidizing agent by adding a reducing agent to the early stage water to be treated (3) or the later stage water to be treated (3).

Abstract: This water treatment system is provided with: a reverse osmosis membrane device; a biofilm treatment device that has a carrier, on a surface of which is formed a biofilm, and that treats water to be treated before the water to be treated is transmitted through the reverse osmosis membrane device; and at least one of a water to be treated stoppage period circulation means and a water to be treated stoppage period supply means that are driven when the intake of new water to be treated is stopped. The water to be treated stoppage circulation means supplies and circulates water to be treated from a water to be treated discharge outlet side of the biofilm treatment device to a water to be treated supply port side. The water to be treated stoppage period supply means supplies new water to be treated to the biofilm treatment device.

Abstract: A water treatment system (1) includes a deionization unit (10) and an ion-selective removing unit (20). The deionization unit (10) includes a pair of opposing electrodes charged to have polarities opposite to each other, a flow passageway positioned between the electrodes and enabling passage of water containing ions, and an ion-exchange membrane disposed on the flow passageway side of each of the electrodes, and performs a deionization process of deionizing the water containing the ions by allowing the ions to be adsorbed onto the electrodes and a regeneration process of eliminating the ions from the electrodes. The ion-selective removing unit (20) separates and removes divalent or more ions from the water containing the ions because the ratio of removing the divalent or more ions that are the scale component among the ions is relatively higher than the ratio of removing monovalent ions from the water containing the ions.

Abstract: Provided is a water treatment system capable of increasing the removal ratio of scale component ions. The water treatment system includes a desalination unit (10) including a pair of facing electrodes (11, 13) being charged to mutually reverse polarities, an interelectrode flow path (15) being located between the electrodes (11, 13) and allowing water containing ions to circulate through, and ion-exchange membranes (12, 14) being disposed on the interelectrode flow path (15) sides of the respective electrodes (11, 13) and permeating the ions toward the electrodes (11, 13) and carrying out a desalination treatment of desalinating the water by adsorbing the ions to the electrodes (11, 13) and a recycling treatment of desorbing the ions from the electrodes (11, 13), in which one of the ion-exchange membranes (14) selectively permeates divalent cations contained in water containing the ions toward the electrode (13).

Abstract: An embodiment of the present invention includes: a spiral type pressure vessel 15 in which a plurality of reverse osmosis membrane apparatuses 13-1 to 13-10 having spiral reverse osmosis membranes is connected through a permeated water pipe 14, and is housed in a connected state; a raw water supplying line that supplies raw water 11 into the pressure vessel 15; a concentrated water discharging line through which concentrated water 16 concentrated is discharged; a plug 17 that blocks the permeated water pipe 14 at the center of the reverse osmosis membrane apparatuses 13-1 to 13-10; a front-side permeated water line and a front-side permeated water line through which front-side permeated water 12-1 and rear-side permeated water 12-2 are discharged to the exterior, respectively, which are separated fore and aft, respectively, of the permeated water pipe 14 blocked by the plug 17; a pressure regulating valve 20 that is mounted in the raw water supplying line and regulates the supply pressure of the raw water 11;

Abstract: A desalination apparatus includes a pretreatment device 13 having a pretreatment membrane 13a that filters suspended matters in raw water 11 with added chlorine-containing water 12, a reverse osmosis membrane device 17 having a reverse osmosis membrane 16 that removes a salt content from filtrate water 14 supplied from the pretreatment device 13 to produce permeated water 15, and a reducing-agent injection device 30 that neutralizes the added chlorine on an upstream side of the reverse osmosis membrane device 17. The reducing-agent injection device 30 extracts a part 14a of the filtrate water 14, adds metering SBS solution 18 to the part, obtains a maximum change point (equivalence point) of the oxidation-reduction potential of a reducing agent and chlorine, obtains reducing-agent additive concentration (Csm) corresponding to the equivalence point, and supplies the SBS solution 18 corresponding to the concentration to the filtrate water 14 to thereby neutralize the chlorine.

Abstract: An embodiment of the present invention includes: a recycle line that brings a part of salt-enriched membrane separation concentrated water 26 back to the rear flow side of a pretreatment apparatus 12; a water discharge line that discharges the remained concentrated water into a sea area; and a control apparatus 31 that controls to adjust the ratio between the discharging amount of the discharging membrane separation concentrated water to be discharged into a sea area and the supplying amount of supplying seawater. A pH is set to be equal to or less than 7.3 by adding acid 21. The salt 18 is obtained from the dryer 19, and produced water (fresh water) 29 is obtained by combining evaporated water 28 supplied from the evaporator 16 with the permeated water 24 supplied from the reverse osmosis membrane apparatus 25.