Water treatment plant and methods for operating a water treatment plant

Abstract

Water treatment plant (10), comprising: - a raw water inlet (11) for providing raw water (R); - a water softening device (12) with an inlet (11a) connected to the raw water inlet (11) and an outlet (11b), wherein the water softening device (12) produces softened water (W) from the raw water (R) and provides it at the outlet (11b), and in particular includes at least one regenerable or replaceable ion exchanger (13); - a regeneration device (18) for regenerating the water softening device (12), in particular the ion exchanger (13) of the water softening device (12); and / or a signaling device which, when the water softening device (12) is exhausted, generates a signal to indicate a required regeneration of the water softening device (12), and in particular a required regeneration or replacement of the ion exchanger (13), or to indicate the water treatment plant (10) to stop,- a control device (14) coupled to the regeneration device (18) and / or the signaling device to regenerate the water softening device (12) in the event of exhaustion and / or to output or display the signal generated by the signaling device, and - at least one measuring device (15) connected to the water softening device (12) and the control device (14) for detecting a hardness breakthrough in the water (W) supplied at the outlet (11b) of the water softening device (12), wherein the measuring device (15) comprises at least one conductivity sensor (2; 2a, 2b), characterized in that the measuring device (15) additionally comprises an electrolysis cell (1) with at least two electrolysis electrodes (A, K) connected to a DC voltage source in order to detect electrolytic precipitation of the alkaline earth ions in the supplied water in the measuring device (15). to carry out water (W).

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