Mitsui Engineering and Shipbuilding Company Limited

Taishi Sato

Masahiro Saito

Gaku Taniguchi

Satoru Okada

Noboru Takemura

[Problem] To provide a membrane treatment method and a membrane treatment apparatus for ballast water using a membrane module, which are capable of inhibiting the formation of scale on the membrane surface to reduce fouling, using a simple installation. [Means for Solving the Problem] The membrane treatment method and the membrane treatment apparatus for ballast water using a membrane module according to the invention, having a membrane treatment tankand a membrane moduleprovided in the tank for continuously performing filtration while ballast water is being passed thereto as raw water; wherein a positive electrode and a negative electrode are provided in the membrane treatment tankso as to come into contact with raw water in the tank, and a current passing means is provided in the tank for applying a voltage between the electrodes.

Membrane treatment method and membrane treatment apparatus for ballast water using membrane module

A membrane treatment apparatus includes a filtration membranefiltering raw water existing in an external environmentby applying pressure thereto and a treated water outletfrom which treated water collected after filtration by the filtration membraneis taken, and is provided with a filter clothplaced and fixed outside the filtration membranewith a predetermined space left between the filter cloth and the filtration membrane. Preferably, the filter clothis provided in such a way as to cover an outer circumferential side and a bottom of the filtration membrane, and the filter clothis provided in such a way as to cover the outer circumferential side of the filtration membranewith the bottom thereof uncovered.

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Tokyo, Japan

Taishi Sato