Abstract: The present invention is to provide means by which energy required for treating sewage sludge can be saved.

Abstract: A filtration unit that includes a casing that has a closed bottom and is immersed in a water storage tank (or water storage pond) into which raw water is introduced, the casing being composed of a introduction port which introduces the raw water in the water storage tank into the casing, an active carbon supply device which adds active carbon to the introduced raw water, an agitator which agitates the raw water inside the casing to which active carbon has been added, a filtration module which filters the raw water, a back flow preventing device which prevents the raw water inside the casing from flowing back into the introduction port and being discharged into the water storage tank, and a discharging device which discharges the raw water from the casing.

Abstract: This invention provides a process a process for recovering terephthalic acid from pulverized products of spent polyethylene terephthalate.

Abstract: A collecting facility for collecting a component of a high melting point in a gas that includes a collecting tower through which a gas flows, a treating liquid projecting apparatus projecting treating liquid having temperature not higher than the melting point of a high melting point component in the gas in the collecting tower, and an extracting device for extracting from the inside of the collecting tower a slurry composed of the treating liquid and the high melting point component solidified by contact with the treating liquid.

Abstract: A facility of collecting a component of high melting point in a gas, excellent in treating efficiency and having a relatively simple structure is provided.

Abstract: A screw pressing type filtering apparatus that discharges a treated substance having a constant water content, including a screw rotatably provided inside a substantially cylindrical filter body so that a substance supplied to the space between the screw and the filter body is filtered by the filter body while being conveyed by the rotating screw. The apparatus further includes: a back pressure valve installed in the discharge port of the filter body to restrict the discharge amount of the filtered substance, an air cylinder that supplies a pressure to the back pressure valve, a valve opening detector which detects the opening amount of the back pressure valve relative to the discharge port, and a control section which controls the air cylinder based upon the detection results of the valve opening detector so that a pressure that corresponds to the degree of opening is supplied to the back pressure valve.

Abstract: This invention provides a process a process for recovering terephthalic acid from pulverized products of spent polyethylene terephthalate.

Abstract: This invention provides a process a process for recovering terephthalic acid from pulverized products of spent polyethylene terephthalate.

Abstract: Vortex melting furnace facilities picks up an image of molten slag flow in a direction traverse to the molten slag flow discharged from the furnace, calculates a molten slag flow rate by brilliance discrimination of the image pick-up signal and controls a water feed rate of a molten slag wet granulation and granulated slag dewatering apparatus and a flow rate of the molten slag in the vortex melting furnace. A video camera is arranged such that a direction of image pick-up traverses to a direction of the molten slag flow and the resulting image is brilliance discriminated by a high brilliance area for the molten slag and a low brilliance area for a molten slag conduit, and the high brilliance area is converted to the fusion flow rate from a liquid level of the molten slag in the fusion conduit.

Abstract: An apparatus is presented for economically making crystallized glass products from waste ash produced from the sewage sludge dewatered by organic matters, which is usually regarded to be difficult to process. The melting is performed in two furnaces: the primary melting furnace and the secondary melting furnace. The primary furnace melts waste ash and the primary melt is charged into the secondary melting furnace. The glassy material produced in the secondary melting furnace is charged into a crystallization furnace to convert the glassy material to a crystallized glass product. This basic configuration of the apparatus allows the production of either irregular shaped crystallized products, such as crushed stone like products, or crystallized manufactured products, such as tiles and blocks, depending on the combination of processing equipment and their operating conditions.

Abstract: Discharge passages for concentrated and separated liquids are separately formed in shafts of a rotary bowl 1 and a screw conveyor 2. In an inlet passage of the radial discharge passage leading from the inside of the rotary bowl 1 to the discharge passage in the shaft, an annular space is divided into sectors by a plurality of deceleration vanes 23, 24 which are mounted on the screw conveyor 2 and extend in a radial direction from the axis of the machine.

Abstract: Waste water is disposed in a flocculation mixing tank 1, an anaerobic tank 2 and an aerobic tank 3 connected in series. First, a dephosphorization flocculating agent and, if necessary, a polymeric flocculating agent are added to waste water in order to produce and grow phosphorus-containing flocs therein. Then, to the water is added a recycling solution from an aerobic tank 3, said solution containing nitrates and nitrites. The mixture water is charged in an anaerobic tank 2 until microbially decomposable components (herein referred to BOD components), nitrates and nitrites are anaerobically and microbially decomposed and gas is produced. In the aerobic tank 3 is charged a supernatant solution from the anaerobic tank 2, said solution containing ammonium compound and BOD components, to nitrates, nitrites and CO.sub.2. At least a part of supernatant solution containing the nitrates and nitrites is recycled to the anaerobic tank 2. Solids discharged from the anaerobic tank 2 and the aerobic tank 3 are wasted.

Abstract: Adiabatic self-evaporation cooling of a refrigerant is performed in a crystallizer for a treated organic matter which contains the refrigerant and is fed into the crystallizer. Crystals produced by the adiabatic self-evaporation cooling are withdrawn from the crystallize. An evaporated vapor is introduced from the crystallizer into an absorber so as to be contacted with a concentrated solution transformed from a generator for condensation in the absorber. A condensate is introduced from the absorber into the generator, the refrigerant is evaporated in the generator, an evaporated vapor is introduced from the generator to the condenser, the evaporated vapor is condensed in the condenser, a condensate is supplied from the condenser to the crystallizer and the concentrated solution is circulated between the absorber and the generator by returning the concentrated solution, in which the concentration of an absorbent is increased by the generator to the absorber.

Abstract: The artificial moving bed of this invention includes a fluid distribution apparatus consisting of an upper fluid distributor and a lower fluid distributor, and a plurality of processing chambers held and fixed between the upper and lower fluid distributors. Each fluid distributor has a rotary valve held in a slidable condition between a fixed supply valve and a pipe fixing plate. These fluid distributors are formed with fluid passages therein. The processing chambers are divided into several groups, each assigned a specific process. Using this artificial moving bed, the processing chambers are operated simultaneously and when the process is finished in each group of processing chambers, the fluid distribution apparatus is rotated clockwise when viewed from above so that each group of chambers proceeds to the next process, thus allowing continuous adsorption operation.

Abstract: The present invention provides a method for making an external circulation fluid bed furnace which does not require a chamber for retaining heat transporting medium communicating with the down comer. According to the method of the present invention, said chamber is eliminated by properly determining the dimension of the down comer etc. According to the present invention, the ratio of the diameter of the down comer to the diameter of the riser so that the ratio (X) thereof falls in an area between two lines described as follows, in a Ws-X plane:Ws=12500X.sup.5 -12080X.sup.4 +4370X.sup.3 -600X.sup.2 +36XandWs=5800X.sup.4 +1600X.sup.3 -580X.sup.2 +44Xwherein, Ws is flow rate of solid heat transport medium in the riser at each unit area the cross section (kg/m.sup.2 sec); X is a ratio of the diameter of down comer (d) to the diameter of riser (D).

Abstract: Adiabatic self-evaporation cooling of a refrigerant is performed in a crystallizer for a treated organic matter which contains the refrigerant and is fed into the crystallizer. Crystals produced by the adiabatic self-evaporation cooling are withdrawn from the crystallize. An evaporated vapor is introduced from the crystallizer into an absorber so as to be contacted with a concentrated solution transformed from a generator for condensation in the absorber. A condensate is introduced from the absorber into the generator, the refrigerant is evaporated in the generator, an evaporated vapor is introduced from the generator to the condenser, the evaporated vapor is condensed in the condenser, a condensate is supplied from the condenser to the crystallizer and the concentrated solution is circulated between the absorber and the generator by returning the concentrated solution, in which the concentration of an absorbent is increased by the generator to the absorber.

Abstract: Waste water is disposed in a flocculation mixing tank 1, an anaerobic tank 2 and an aerobic tank 3 connected in series. First, a dephosphorization flocculating agent and, if necessary, a polymeric flocculating agent are added to waste water in order to produce and grow phosphorus-containing flocs therein. Then, to the water is added a recycling solution from an aerobic tank 3, said solution containing nitrates and nitrites. The mixture water is charged in an anaerobic tank 2 until microbially decomposable components (herein referred to BOD components), nitrates and nitrites are anaerobically and microbially decomposed and gas is produced. In the aerobic tank 3 is charged a supernatant solution from the anaerobic tank 2, said solution containing ammonium compound and BOD components, to nitrates, nitrites and CO.sub.2. At least a part of supernatant solution containing the nitrates and nitrites is recycled to the anaerobic tank 2. Solids discharged from the anaerobic tank 2 and the aerobic tank 3 are wasted.

Abstract: A new powder mixing apparatus can mix a plurality of materials in a limited area of installment of apparatus by providing a plurality of container devices on both sides of a movement device so that the movement device carrying a mixing vessel can move reciprocally between the container devices of the both sides.

Abstract: An apparatus for moving upper and lower molds toward and apart from each other and giving additionally increased clamping force to the engaged molds.

Abstract: An apparatus for driving upper and lower tool parts for punching, cutting and stamping, and more particular to such an apparatus using a rotary screw rod and a nut member threadedly engaging with the screw rod so as to move up or down therealong.