Abstract: The present invention relates to a method and an apparatus, in which the quality of a large amount of water and/or the quantity of dissolved oxygen in said water is improved and which are characterized in that water, in which slaked lime is dissolved in advance, and/or water of high oxygen content, which is generated in advance, is supplied into water pumped by an intermittent pneumatic water pumping unit so that the water having the slaked lime dissolved therein and/or the water of high oxygen content is diffused in the large amount of water.

Abstract: The present invention relates to a method and apparatus, in which the quality of a large amount of water and/or the quantity of dissolved oxygen in the water is improved. Water in which slaked lime is dissolved in advance and/or water of a high oxygen content which is generated in advance is supplied into water pumped by an intermittent pneumatic water pumping unit so that the water having the slaked lime dissolved therein and/or the water of high oxygen content is diffused in the large amount of water. The present invention also relates to a method and apparatus, in which the quality of a large amount of water and/or the quantity of dissolved oxygen in the large amount of water is improved by water with slaked lime dissolved therein and/or water of high oxygen content being conducted to the bottom of a lake or the like. An intermittent pneumatic water pumping unit is operated in the lake or the like so that the large amount of water is caused to flow up and down and be agitated.

Abstract: A method and an apparatus are used in shallow water areas having a depth of about two meters or less for producing a total water circulating flow from the bottom toward the top and then from the top toward the bottom, to thereby improve the quality of the total water. The method consists essentially of providing an upward jet of fluid under pressure acting upon a water flow rising from the bottom toward the top through a tubular passage of vertically disposed tubular construction so that the water flow can rise with an increased speed. At the top end of the tubular passage, the water flow is jetted out, forcing a circulating flow with circular motions. The apparatus comprises a vertically disposed tubular construction having a tubular passage through which the water flows and rises, including a member for producing an upward jet of fluid under pressure disposed inside the tubular passage and exposed to the water in the tubular passage.

Abstract: A water aeration apparatus is used for aeration purposes in the water-filled areas such as dams, impounded water or reservoirs, and lakes and marshes, and includes a tubular casing and supply chamber that causes large quantities of water to be exposed to the flotation action of air supplied under pressure, thus raising the water up to the surface. The apparatus may be used for water purification, or for anti-freezing purposes particularly in cold climate regions. The apparatus includes a collective tubular casing and a multiple-partitioned or common air supply chamber below the casing, the tubular casing including a plurality of tubular air and water passages formed by dividing the interior of the casing into several longitudinal passages or by combining individual tubes together.

Abstract: A method of processing the water in a large water region such as a river, dam, lake and marsh is in which a local water processing area is provided for water cleaning, aerating and other purposes, the local water processing area being delimited by a produced water flow produced specific depth and width of the large water region and separating the local water processing area from the remainder of the large water region.The local water processing area may be delimited and separated by a water flow wall or barrier produced by a jet of water or a jet of air, thereby eliminating the need for any physical barrier such as sheet piles or other permanent structure and yet maintaining the continuity between the local water processing area and the rest of the large water region. In addition, the method allows the produced water flow to be localized, providing several advantages over the conventional methods in terms of the obstacleless navigation and less costly implementation.

Abstract: A water aeration apparatus is used for aeration purposes in the water-filled areas such as dams, impounded water or reservoirs, and lakes and marshes, and includes a tubular casing and supply chamber that causes large quantities of water to be exposed to the flotation action of air supplies under pressure, thus raising the water up to the surface. The apparatus may be used for water purification, or for anti-freezing purposes particularly in cold climate regions. The apparatus includes a collective tubular casing and a multiple-partitioned or common air supply chamber below the casing, the tubular casing including a plurality of tubular air and water passages formed by dividing the interior of the casing into several longitudinal passages by combining individual tubes together.

Abstract: A method is provided for use with an apparatus which produces jets of water through a vertical water diffuser tube by supplying individually formed air bubble masses at regular intervals, which are followed by the water being drawn under the action of the air bubble masses. The method improves the water processing efficiency and ability of the apparatus by defining the volumetric quantity of a formed air mass in relation to the diameter of the particular air diffuser tube and defining a certain relationship between the length L (m) of the tube through which the rises and the time interval T (sec) at which the individual air bubble masses are produced.

Abstract: A water aeration apparatus is used for aeration purposes in the water-filled areas such as dams, impounded water or reservoirs, and lakes and marshes, and includes a tubular casing and supply chamber that causes large quantities of water to be exposed to the flotation action of air supplied under pressure, thus raising the water up to the surface. The apparatus may be used for water purification, or for anti-freezing purposes particularly in cold climate regions. The apparatus includes a collective tubular casing and a multiple-partitioned or common air supply chamber below the casing, the tubular casing including a plurality of tubular air and water passages formed by dividing the interior of the casing into several longitudinal passages or by combining individual tubes together.