Wastewater treatment system

A wastewater treatment system for treating regeneration wastewater generated by a regeneration process using an acidic aqueous solution for a desalination device for desalting water containing ammonia, comprising:

• a bipolar membrane electrodialyzer for separating, from the regeneration wastewater containing an ammonia salt produced by reaction between ammonia captured by the desalination device and the acidic aqueous solution or from a solution derived from the regeneration wastewater, an aqueous solution containing an acidic solute that is the same as the acidic aqueous solution as a regeneration acidic aqueous solution,
• wherein the wastewater treatment system is configured such that the regeneration acidic aqueous solution is used as at least part of the acidic aqueous solution for regeneration of the desalination device,
• wherein the bipolar membrane electrodialyzer includes:
• an anode;
• a cathode;
• and
• a cell disposed between the anode and the cathode,
• wherein the cell includes:
• a first bipolar membrane including a first anion exchange membrane and a first cation exchange membrane;
• a second cation exchange membrane facing the first cation exchange membrane;
• and
• a second bipolar membrane including a second anion exchange membrane facing the second cation exchange membrane and a third cation exchange membrane, and
• wherein the bipolar membrane electrodialyzer is configured such that the regeneration wastewater is supplied to a first chamber defined by the first bipolar membrane and the second cation exchange membrane, and that the regeneration acidic aqueous solution is discharged from the first chamber.

A wastewater treatment system for treating regeneration wastewater generated by a regeneration process using an acidic aqueous solution for a desalination device for desalting water containing ammonia, comprising:

• a bipolar membrane electrodialyzer for separating, from the regeneration wastewater containing an ammonia salt produced by reaction between ammonia captured by the desalination device and the acidic aqueous solution or from a solution derived from the regeneration wastewater, an aqueous solution containing an acidic solute that is the same as the acidic aqueous solution as a regeneration acidic aqueous solution,
• wherein the wastewater treatment system is configured such that the regeneration acidic aqueous solution is used as at least part of the acidic aqueous solution for regeneration of the desalination device,
• wherein the bipolar membrane electrodialyzer includes:
• an anode;
• a cathode;
• and
• a cell disposed between the anode and the cathode,
• wherein the cell includes:
• a first bipolar membrane including a first anion exchange membrane and a first cation exchange membrane;
• a second anion exchange membrane facing the first cation exchange membrane;
• a second cation exchange membrane facing the second anion exchange membrane;
• and
• a second bipolar membrane including a third anion exchange membrane facing the second cation exchange membrane and a third cation exchange membrane, and
• wherein the bipolar membrane electrodialyzer is configured such that the regeneration wastewater is supplied to a first chamber defined by the second anion exchange membrane and the second cation exchange membrane, and that the regeneration acidic aqueous solution is discharged from a second chamber defined by the first bipolar membrane and the second anion exchange membrane.