Abstract: Provided is a nonaqueous electrolyte solution for a lithium secondary battery, the nonaqueous electrolyte solution containing a compound (I) represented by Formula (I) and a compound (II) represented by Formula (II). In Formula (I), each of R1 and R2 independently represents a substituent such as an alkyl group having from 1 to 7 carbon atoms. In Formula (II), R3 represents an oxygen atom or the like; R4 represents a group represented by Formula (ii-1), a group represented by Formula (ii-2), or the like; and * represents a binding position. In Formula (ii-1), R41 represents an oxymethylene group or the like and, in Formula (ii-2), R42 represents an alkyl group having from 1 to 6 carbon atoms, or the like.

Abstract: The present invention provides a ballast water treatment system including a reaction tank in which raw water and ozone are imported and made to react each other for a predetermined period of time to kill microorganisms existing in raw water, an ozone decomposer in which water containing residual ozone discharged from the reaction tank is imported and the residual ozone is decomposed, and a circulation pump installed between the reaction tank and ozone decomposer, forming a circulation system which removes the residual ozone by means of circulating the water containing the residual ozone between the reaction tank and ozone decomposer. Accordingly, this system dispenses with a deaeration tank which would require a wide space for installation, small cost and is able to be applied to existing ships easily.

Abstract: The present invention provides a ballast water treatment system including a reaction tank in which raw water and ozone are imported and made to react each other for a predetermined period of time to kill microorganisms existing in raw water, an ozone decomposer in which water containing residual ozone discharged from the reaction tank is imported and the residual ozone is decomposed, and a circulation pump installed between the reaction tank and ozone decomposer, forming a circulation system which removes the residual ozone by means of circulating the water containing the residual ozone between the reaction tank and ozone decomposer. Accordingly, this system dispenses with a deaeration tank which would require a wide space for installation, small cost and is able to be applied to existing ships easily.

Abstract: The present invention provides a ballast water treatment system including a reaction tank in which raw water and ozone are imported and made to react each other for a predetermined period of time to kill microorganisms existing in raw water, an ozone decomposer in which water containing residual ozone discharged from the reaction tank is imported and the residual ozone is decomposed, and a circulation pump installed between the reaction tank and ozone decomposer, forming a circulation system which removes the residual ozone by means of circulating the water containing the residual ozone between the reaction tank and ozone decomposer. Accordingly, this system dispenses with a deaeration tank which would require a wide space for installation, small cost and is able to be applied to existing ships easily.

Abstract: The present invention provides a ballast water treatment system including a reaction tank in which raw water and ozone are imported and made to react each other for a predetermined period of time to kill microorganisms existing in raw water, an ozone decomposer in which water containing residual ozone discharged from the reaction tank is imported and the residual ozone is decomposed, and a circulation pump installed between the reaction tank and ozone decomposer, forming a circulation system which removes the residual ozone by means of circulating the water containing the residual ozone between the reaction tank and ozone decomposer. Accordingly, this system dispenses with a deaeration tank which would require a wide space for installation, small cost and is able to be applied to existing ships easily.

Abstract: A ballast water intake and treatment system is disclosed, the system including a membrane treatment unit arranged in or on a ship hull for the separation of microorganisms of no smaller than a given size and organized to execute filtration during the intake of sea water or fresh water outside the hull into ballast tanks by the use of an intake pump installed consecutively with the membrane treatment unit. The system checks the invasion of microorganisms, etc. of no smaller than a given size during the intake of ballast water and allows ballast water free of microorganisms, etc. of no smaller than a given size to be fed into ballast tanks.

Abstract: The present invention provides a ballast water treatment system including a reaction tank in which raw water and ozone are imported and made to react each other for a predetermined period of time to kill microorganisms existing in raw water, an ozone decomposer in which water containing residual ozone discharged from the reaction tank is imported and the residual ozone is decomposed, and a circulation pump installed between the reaction tank and ozone decomposer, forming a circulation system which removes the residual ozone by means of circulating the water containing the residual ozone between the reaction tank and ozone decomposer. Accordingly, this system dispenses with a deaeration tank which would require a wide space for installation, small cost and is able to be applied to existing ships easily.