Abstract: According to the present invention, there is provided a stirred tank for storing yeast slurry to be supplied to fermentation tanks where fermented foods such as beer are fermented, is characterized in that a stirring impeller is provided within the stirred tank and so constructed that a maximum diameter of a rotation body defined by the rotation of the stirring impeller is 60-90% of the inner diameter of the stirred tank, and the height of the rotation body is 70% or more of a standard depth of the yeast slurry normally stored in the stirred tank.

Abstract: The present invention provides a method for treatment of wastewater containing organic sulfur compounds The method includes introducing the wastewater into an apparatus body equipped with a fixed bed in which fixed carriers for the attachment of microorganisms are filled and a fluidized bed in which flowing carriers for the attachment of microorganisms are flown, and enabling the wastewater to flow through the fluidized bed towards the fixed bed so that the wastewater is biologically treated by the fluidized bed and the fixed bed.

Abstract: According to the present invention, there is provided an electrode plate for a water electrolysis device, which is formed from a metal plate having such a thickness as to be capable of being press-formed, and which comprises a flat plate portion, and a peripheral edge portion positioned on the outer side of the flat plate portion and bent so that recesses and protrusions are alternately arrayed along an outer peripheral edge thereof.

Abstract: A method and apparatus are disclosed for treating an organic waste water which are capable of utilizing compact equipment by reducing the quantity of a sludge to be treated. Organic waste water (A) is subjected to an aerobic biological treatment in a biological treatment tank (3). Then, solution (B) obtained by the treatment in the biological treatment tank (3) is solid-liquid separated into treated water (C) and sludge (D) in precipitation tank (5). A portion of the sludge (D) separated in the precipitation tank (5) is returned to the biological treatment tank (3) through a route (6). A portion (E) of the sludge separated in the precipitation tank (5) is concentrated by a concentration device (8). Thereafter, the concentrated sludge (E) is solubilized by thermophilic bacteria in a solubilizing tank (10).

Abstract: A method and apparatus are disclosed for treating an organic waste water which are capable of utilizing compact equipment by reducing the, quantity of a sludge to be treated. Organic waste water (A) is subjected to an aerobic biological treatment in a biological treatment tank (3). Then, solution (B) obtained by the treatment in the biological treatment tank (3) is solid-liquid separated into treated water (C) and sludge (D) in precipitation tank (5). A portion of the sludge (D) separated in the precipitation tank (5) is returned to the biological treatment tank (3) through a route (6). A portion (E) of the sludge separated in the precipitation tank (5)is concentrated by a concentration device (8). Thereafter, the concentrated sludge (E) is solubilized by thermophilic bacteria in a solubilizing tank (10).

Abstract: The present invention provides a method of treating water containing organic sulfur compounds. The method includes treating the water containing the organic sulfur compounds by adding wastewater containing a quaternary ammonium compound or wastewater containing an amine thereto. An apparatus for carrying out the above method is also provided.

Abstract: A method and apparatus are disclosed for treating an organic waste water which are capable of utilizing compact equipment by reducing the quantity of a sludge to be treated. Organic waste water (A) is subjected to an aerobic biological treatment in a biological treatment tank (3). Then, solution (B) obtained by the treatment in the biological treatment tank (3) is solid-liquid separated into treated water (C) and sludge (D) in precipitation tank (5). A portion of the sludge (D) separated in the precipitation tank (5) is returned to the biological treatment tank (3) through a route (6). A portion (E) of the sludge separated in the precipitation tank (5)is concentrated by a concentration device (8). Thereafter, the concentrated sludge (E) is solubilized by thermophilic bacteria in a solubilizing tank (10).

Abstract: A treated stainless steel is used as the material of construction for parts of an apparatus exposed to an organic amine. The stainless steel is treated by cleaning the stainless steel, forming a colored oxide film on the surface of the cleaned stainless steel by heating the cleaned stainless steel in an oxidizing atmosphere, and removing a portion of the colored oxide film to expose a passivating oxide film.

Abstract: A method and an apparatus for treating an organic waste water capable of deodorizing an exhaust gas diffused into an atmosphere is provided, wherein heat energy loss is small and the amount of an organic or inorganic nitrogen compounds in an effluent from the apparatus is low. In the method of the present invention, an organic waste water is nitrified in a nitrification device 8, denitrified in a denitrification device 9, and subjected to an aerobic biological treatment in an aeration tank 10, and then the treated mixture is solid-liquid separated in a solid-liquid separation device 3. A portion of an excess sludge separated in solid-liquid separation device 3 is solubilized at a high temperature in a solubilization device 6, and the solution after a solubilization treatment is returned to denitrification device 9 and a gas exhausted from solubilization device 6 is charged into nitrification device 8.

Abstract: A method of treating an organic waste water, which is capable of separating and recovering phosphorus components in a liquid or solid form, is provided. According to the method of the present invention, reuse of phosphorus components can be facilitated, while the content of phosphorus components contained in a large quantity of a primary treated liquid can be reduced.

Abstract: A method of continuously treating an organic waste water which simplifies the overall process, avoids lengthy solubilizing reactions to reduce the volume of a solubilizing vessel, and effectively performs the solubilizing treatment is disclosed. In the method of continuously treating an organic waste water containing organic solids, the solubilizing treatment for the organic sludge is carried out using heat and under conditions such that a sludge solubilization enzyme is produced and secreted from a microorganism to promote solubilization, and the solubilizing treatment time is determined based on a hydraulic residence time of a treated solution in a solubilizing treatment device.

Abstract: An electric discharge wire-holding structure for a wet-type electric dust collector is disclosed. The holding structure is capable of increasing the service life of electric discharge wires by preventing the presence of a minute clearance at the end of the electric discharge wire which is fastened on the electrode bar, thereby providing a continuous path for a flowing current and preventing electric wear due to a potential difference. The holding structure includes a hook provided at the fastened end of an electric discharge wire, and which is fastened on a planar set seat formed on an electrode bar by a set screw.

Abstract: An activated sludge treatment apparatus having an aeration tank 14 for subjecting an organic waste water to an aerobic biological treatment, a first precipitation device 16 for separating a waste water treated in aeration tank 14 into treated water and a sludge, a recycle route 18 for returning a portion of the sludge separated by precipitation device 16 to aeration tank 14, a solubilizing treatment device 24 for solubilizing, at a high temperature, excess sludge separated by precipitation device 16, and a return route 30 for returning a treated solution solubilized by solubilizing treatment device 24 to aeration tank 14, is disclosed.

Abstract: A batch type furnace includes a furnace body, a floor being removably attachable to the furnace body for forming a furnace chamber, and radiant tubes being substantially and uniformly arranged in the furnace body and the floor. The radiant tubes are controllable to a predetermined temperature independently of each other. The radiant tubes are made of an alloy having a heat resistance of such a degree as to tolerate quick heating and cooling.

Abstract: A simply configured cooling mechanism for an apparatus for producing hydrogen and oxygen is disclosed. The configuration makes it possible to freely select the type of heat exchanger, without any restrictions, in order to improve cooling efficiency. In particular, a heat exchanger for cooling deionized water in a deionized water tank, which contains an electrolytic cell, is installed outside the tank. An inlet to the heat exchanger is connected to a deionized water flow outlet from the tank that is below the level of the deionized water the tank by a pipe, and an outlet from the heat exchanger to tank is connected to a deionized water flow inlet that is positioned in the tank below the deionized water flow outlet.

Abstract: A simple and efficient apparatus for producing hydrogen and oxygen is disclosed, wherein resistance to the flow of deionized water, oxygen gas, and hydrogen gas does not increase, and the amount of electric energy required for electrolysis can be reduced. A bipolar-type apparatus for producing hydrogen and oxygen, wherein a main water feeding path is formed in the approximate center of electrode plates in the axial direction, and an anode chamber and a cathode chamber are formed on opposing surfaces of the electrode plates to store porous conductors. A secondary water feeding path for the anode chamber directs water from the main water feeding path to the anode chamber. On the cathode side of the apparatus, a hydrogen gas collecting chamber is formed, a plurality of radial hydrogen gas paths are formed from the cathode chamber to the hydrogen gas collecting chamber, and a hydrogen gas discharging path are formed to axially hydrogen gas collecting chambers in each electrode plate.

Abstract: An apparatus for controlling dissolved oxygen concentration in primary and secondary cooling water in boiling water and pressurized water atomic reactors is disclosed. The apparatus contains an electrolytic cell having an anode chamber and a cathode chamber separated from one another by a diaphragm of a solid polymer electrolyte membrane. The diaphragm contains: (a) an ion exchange membrane and (b) a pair of multilayered electrodes chemically plated to both surfaces of the ion exchange membrane. The electrolytic cell is operatively connected to a circular route for cooling water in the reactor, and hydrogen gas generated through electrolysis of deionized water in the cathode side of the cell is introduced into the circular route for the cooling water to control the dissolved oxygen concentration of the cooling water.

Abstract: An apparatus for producing hydrogen and oxygen having a pressure vessel surrounding a bipolar-type water electrolytic cell The electrolytic cell contains a plurality of joined solid electrolyte membrane units, and each solid electrolyte membrane unit contains a solid electrolyte membrane, porous conductors in contact with opposing surfaces of the solid electrolyte membrane, and bipolar-type electrode plates in contact with each porous conductor, wherein each electrode plate is capable of performing as an anode and a cathode. A gap is present between the interior of the pressure vessel and the exterior of the water electrolytic cell to form a water pressure regulating chamber, and water of a preselected pressure can be fed into the water pressure regulating chamber such that the pressure differential between the pressure inside the water electrolytic cell and the pressure inside the water pressure regulating chamber is maintained within the pressure differential tolerance range of the water electrolytic cell.

Abstract: A hydrogen/oxygen gas generating system includes a deionized water container and a cell for water electrolysis having anode and cathode compartments, the cell being submerged in deionized water in the container. Oxygen gas generated in the anode compartment is channeled to an oxygen gas separating chamber defined in the container at its top whereas hydrogen gas generated in the cathode compartment is channeled to a gas/liquid separator. The pressures of these gases are detected, and in accordance with the detected gas pressures, a first gas piping line for delivering oxygen gas outward from the oxygen gas separating chamber and a second gas piping line for delivering hydrogen gas outward from the separator are controlled such that the differential pressure between the gases may fall in a limited range.

Abstract: A method for treating water containing organic sulfur compounds comprises adjusting the pH value of the water in a pH adjustment tank, biologically treating the water in a biological treatment tank, adjusting the pH value of the water to be alkaline at any places in the biological treatment tank, maintaining the dissolved oxygen concentration of the water to 2 mg/L or higher at any places in the biological treatment tank, and supplying a part of the water to the pH adjustment tank for a further treatment. An apparatus for carrying out the above method is also provided.