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, 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 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 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, and wherein the at least one outlet of the at least one membrane filtration unit is connected to at least one inlet of the at least one dosing unit. a) at least one dosing unit provided with at least one inlet and at least one outlet, 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 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 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 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 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, and wherein the at least one outlet of the at least one membrane filtration unit is connected to at least one inlet of the at least one dosing unit.