Installation for the preparation of a solution of calcium hydrogen carbonate, the installation comprising in circular communication a) at least one dosing unit provided with at least one inlet and at least one outlet, wherein the at least one dosing unit is connected to at least one membrane filtration unit such that the residue obtained in the at least one membrane filtration unit is circulated back into the at least one dosing unit, and wherein at least one outlet of the at least one dosing unit is connected to at least one inlet of the master batch line and at least one outlet of the at least one dosing unit is connected to at least one inlet of the at least one slave batch line (12, 14), b) a multiple batch system comprising x) a master batch line provided with at least one inlet and at least one outlet, the master batch line comprising in circular communication i) at least one gas dosing inlet, ii) at least one mixing unit provided with at least one inlet and at least one outlet, and iii) at least one tank provided with at least one inlet and at least one outlet, and xi) at least one slave batch line (12, 14) provided with at least one inlet and at least one outlet, the at least one slave batch line (12, 14) comprising in circular communication i) at least one gas dosing inlet, ii) at least one mixing unit provided with at least one inlet and at least one outlet, and iii) at least one tank provided with at least one inlet and at least one outlet, wherein at least one outlet of the master batch line is connected to at least one inlet of the at least one membrane filtration unit and at least one outlet of the at least one slave batch line (12, 14) is connected to at least one inlet of the at least one membrane filtration unit, and c) at least one membrane filtration unit provided with at least one inlet and at least one outlet, wherein the at least one membrane filtration unit is a cross flow membrane microfiltration device and/or a cross flow ultrafiltration device. a) at least one dosing unit provided with at least one inlet and at least one outlet, wherein the at least one dosing unit is connected to at least one membrane filtration unit such that the residue obtained in the at least one membrane filtration unit is circulated back into the at least one dosing unit, and wherein at least one outlet of the at least one dosing unit is connected to at least one inlet of the master batch line and at least one outlet of the at least one dosing unit is connected to at least one inlet of the at least one slave batch line (12, 14), b) a multiple batch system comprising x) a master batch line provided with at least one inlet and at least one outlet, the master batch line comprising in circular communication i) at least one gas dosing inlet, ii) at least one mixing unit provided with at least one inlet and at least one outlet, and iii) at least one tank provided with at least one inlet and at least one outlet, and xi) at least one slave batch line (12, 14) provided with at least one inlet and at least one outlet, the at least one slave batch line (12, 14) comprising in circular communication i) at least one gas dosing inlet, ii) at least one mixing unit provided with at least one inlet and at least one outlet, and iii) at least one tank provided with at least one inlet and at least one outlet, wherein at least one outlet of the master batch line is connected to at least one inlet of the at least one membrane filtration unit and at least one outlet of the at least one slave batch line (12, 14) is connected to at least one inlet of the at least one membrane filtration unit, and x) a master batch line provided with at least one inlet and at least one outlet, the master batch line comprising in circular communication i) at least one gas dosing inlet, ii) at least one mixing unit provided with at least one inlet and at least one outlet, and iii) at least one tank provided with at least one inlet and at least one outlet, and i) at least one gas dosing inlet, ii) at least one mixing unit provided with at least one inlet and at least one outlet, and iii) at least one tank provided with at least one inlet and at least one outlet, and xi) at least one slave batch line (12, 14) provided with at least one inlet and at least one outlet, the at least one slave batch line (12, 14) comprising in circular communication i) at least one gas dosing inlet, ii) at least one mixing unit provided with at least one inlet and at least one outlet, and iii) at least one tank provided with at least one inlet and at least one outlet, i) at least one gas dosing inlet, ii) at least one mixing unit provided with at least one inlet and at least one outlet, and iii) at least one tank provided with at least one inlet and at least one outlet, c) at least one membrane filtration unit provided with at least one inlet and at least one outlet, wherein the at least one membrane filtration unit is a cross flow membrane microfiltration device and/or a cross flow ultrafiltration device.