Abstract: This invention is directed to a gas/liquid separation flow rate regulator, which effectively carries out gas/liquid separation by preventing an uncontrolled flow of sewage and facilitates control of liquid flow. To accomplish this objective, the outer shell of the gas/liquid separation flow rate regulator is cylindrical in shape with its inner periphery providing a cylindrical surface. An edge inclining unidirectly from one end to the other is formed at the upper edge of a partition plate for dividing the cylindrical shell into two chambers, and the lower end of this inclined edge is butted to the cylindrical surface of the cylindrical member so as to form an overflow weir. A return port is centrally located on the cylindrical member and is disposed on the opposite side surface of the cylindrical member facing the overflow weir.

Abstract: A fitting structure of partition plates to a structure is disclosed which is directed to providing a sufficient bonding strength to one of the surfaces of an end portion of the partition plates fitted to a groove and a sufficient water-stopping property to the other surface.When the end portion of the partition plate is fitted to the groove, a very small space is defined between one of the side surfaces of the end portion and one of the side walls of the groove opposing the former, through a spacer, and a sealing material is set in a thin film form in this space. A large space is defined between the other side surface of the end portion and the other side wall of the groove opposing the former, through a thick spacer, and the sealing material is set in a thick form in this space.

Abstract: In order to easily and correctly adjust and set horizontality of an overflow weir in a treatment tank, the center portion of the overflow weir is supported through a fulcrum shaft in such a manner that the overflow weir can swing to the right and left, and an adjustment position fixing member is engaged with the overflow weir.