Abstract: Provided is a transfer pump for a fixed amount of fluid, the transfer pump including: a tube guide block that is inserted to partially expose a fluid transfer tube; a tube compression block that is reciprocally disposed on the tube guide block and compresses the exposed portion of the tube inserted into the tube guide block to transfer the fluid; an air cylinder that has a rod connected to the tube compression block and reciprocates the tube compression block by reciprocating the rod in a linear direction by using compressed air; and an elastic member that allows the tube compression block to compress the tube by applying an elastic force to the air cylinder, such that the tube can be accurately compressed and a fixed amount of fluid can be discharged.

Abstract: Provided is a ballast water treatment apparatus by using sodium dichloroisocyanurate. The ballast water treatment apparatus includes: a cartridge that is provided with an inlet and an outlet in order that a fresh water is introduced and discharged, that is provided with an inlet valve and an exhaust valve installed in the inlet and the outlet respectively, and that is equipped with the sodium dichloroisocyanurate; and a dissolution tank that is equipped with a agitator configured to be connected to the outlet of the cartridge to agitate the sodium dichloroisocyanurate.