Method for processing mine waters by means of a membrane filtration apparatus, comprising - at least one membrane filter module with at least one membrane (la) with a filter-active membrane surface of at least 0.5m 2, - at least one inflow device for the mine water, - at least one conveying device for taking the mine water from the at least one inflow device into the at least one membrane filter module, and - at least one discharge device per membrane filter module in each case for permeate and concentrate formed, wherein the mine water is provided in the at least one inflow device, is conveyed by means of the at least one conveying device to the at least one membrane filter module and undergoes membrane filtration there, wherein the mine water is supplied to the at least one membrane filter module with a pH value ranging from 2 to < 7, wherein the mine water flows through the at least one membrane filter module such that more than 50% of the filter-active membrane surface has a turbulent flow applied to it, wherein the concentrate formed is transferred into a galvanic cell unit in which metal ions contained in the concentrate are filtered out while a metal-free concentrate is formed, wherein the metal-free concentrate is transferred from the galvanic cell unit into a reaction beaker, wherein an alkali substance is added to the metal-free concentrate while stirring and/or injecting gas, wherein a mixed concentrate (6") is created, from which gypsum is precipitated, and wherein the mixed concentrate (6") is transferred into a settling beaker, in which the precipitated gypsum sediments and wherein overflow water of the settling beaker is mixed into mine waters still to be processed and is fed again by means of the at least one conveying device to the at least one membrane filter module. - at least one membrane filter module with at least one membrane (la) with a filter-active membrane surface of at least 0.5m 2, - at least one inflow device for the mine water, - at least one conveying device for taking the mine water from the at least one inflow device into the at least one membrane filter module, and - at least one discharge device per membrane filter module in each case for permeate and concentrate formed, wherein the mine water is provided in the at least one inflow device, is conveyed by means of the at least one conveying device to the at least one membrane filter module and undergoes membrane filtration there, wherein the mine water is supplied to the at least one membrane filter module with a pH value ranging from 2 to < 7, wherein the mine water flows through the at least one membrane filter module such that more than 50% of the filter-active membrane surface has a turbulent flow applied to it, wherein the concentrate formed is transferred into a galvanic cell unit in which metal ions contained in the concentrate are filtered out while a metal-free concentrate is formed, wherein the metal-free concentrate is transferred from the galvanic cell unit into a reaction beaker, wherein an alkali substance is added to the metal-free concentrate while stirring and/or injecting gas, wherein a mixed concentrate (6") is created, from which gypsum is precipitated, and wherein the mixed concentrate (6") is transferred into a settling beaker, in which the precipitated gypsum sediments and wherein overflow water of the settling beaker is mixed into mine waters still to be processed and is fed again by means of the at least one conveying device to the at least one membrane filter module.