Remediation method and system for deep-sea mine tailings

A method of remedying deep-sea mine tailings, the method comprising the steps of:

• adjusting a solid-liquid ratio of deep-sea mine tailings by mixing the deep-sea mine tailings with water in a reaction basin, wherein the solid-liquid ratio is in a range from 1:3 to 1:6 in terms of weight;
• adding aluminum sulfate to the adjusted deep-sea mine tailings to extract heavy metals;
• sending fluid containing solids and the extracted heavy metals to a filtration apparatus including a housing having an internal space and a predetermined number of installation holes for a plurality of ion exchange membrane modules removably installed in the housing;
• conditioning remaining solids to solidify the remaining solids such that the remaining solids can be easily carried or to produce the remaining solids with predetermined strength and that are not hazardous to an environment by a conditioning unit,
• wherein each ion exchange membrane module of the plurality of the ion exchange membrane modules consists of
• a rectangular frame consisting of
• a rectangular installation portion with an upper end and a closed lower end;
• a rectangular collection portion with an upper end and a lower end that is configured with a plurality of;
• and
• a partition wall disposed between the rectangular installation portion and the rectangular collection portion, and
• a plurality of cylindrical ion exchange membranes having central holes that are arranged within the rectangular frame in parallel, each extending from direct contact with the lower end of the rectangular frame upward to directly contact a partition wall disposed between the lower end of the rectangular collection portion and the plurality of cylindrical ion exchange membranes, and the central holes respectively in communication with the plurality of openings of the rectangular collection portion, wherein the plurality of cylindrical ion exchange membranes are made of a material that blocks cations of heavy metals contained in fluid, wherein the rectangular frame includes a mesh on a flank side so that fluid containing the extracted heavy metals can pass through the mesh, and wherein an upper end of each of the plurality of cylindrical ion exchange membranes is fastened to a respective partition wall common to the lower end of the rectangular collection portion and a lower end is fastened to the lower end of the rectangular frame to allow free rotation of the plurality of cylindrical ion exchange membranes;
• passing the fluid containing the extracted heavy metals from the reaction basin through the mesh;
• filtering the fluid containing the extracted heavy metals through the plurality of cylindrical ion exchange membranes;
• and
• collecting treated water in the rectangular collection portion,
• wherein a discharge pipe connected to the rectangular collection portion discharges the treated water,
• wherein each ion exchange membrane module of the plurality of ion exchange membrane modules includes an electric driving unit that rotates each cylindrical ion exchange membranes,
• wherein the conditioning unit comprises a second housing having a cylinder shape and including an additive injection hole for a solidifying agent at a first portion, an inflow pipe connected to a lower surface of the housing, a conditioned solid discharge hole at a second portion;
• and a screw rotatably installed in the second housing.