Abstract: Disclosed is a process for enriching silicate content in drinking water that includes separating raw water via reverse osmosis into a permeate comprising demineralised raw water and a retentate comprising mineral enriched raw water. The permeate is mixed with a water glass solution comprising sodium silicate and/or potassium silicate. An ion exchange process is used to reduce the concentration of sodium and/or potassium ions in at least part of the mixture. At least part of the retentate is supplied to the mixture after reducing the concentration of sodium and/or potassium ions to provide a silicate-enriched drinking water. Also disclosed is an apparatus for producing a drinking water enriched with silicate. The apparatus includes a reverse osmosis unit, a mixing unit, an ion exchanger, and a feed unit for feeding at least part of the retentate to the mixture after reducing the concentration of sodium and/or potassium ions.

Abstract: The present disclosure relates to a method for the production of drinking water with high silicate content, including the steps of mixing demineralised raw water and a waterglass solution comprising sodium and/or potassium silicate; and subjecting at least one part of the mixture to an ion exchange process to reduce the concentration of sodium and/or potassium. Furthermore, the present disclosure relates to a device for the production of drinking water with high silicate content, the device including a mixing device for mixing demineralised raw water and a waterglass solution comprising sodium and/or potassium silicate, an ion exchanger to subject at least one part of the mixture to an ion exchange process to reduce the concentration of sodium and/or potassium.

Abstract: Disclosed is a process for enriching silicate content in drinking water that includes separating raw water via reverse osmosis into a permeate comprising demineralised raw water and a retentate comprising mineral enriched raw water. The permeate is mixed with a water glass solution comprising sodium silicate and/or potassium silicate. An ion exchange process is used to reduce the concentration of sodium and/or potassium ions in at least part of the mixture. At least part of the retentate is supplied to the mixture after reducing the concentration of sodium and/or potassium ions to provide a silicate-enriched drinking water. Also disclosed is an apparatus for producing a drinking water enriched with silicate. The apparatus includes a reverse osmosis unit, a mixing unit, an ion exchanger, and a feed unit for feeding at least part of the retentate to the mixture after reducing the concentration of sodium and/or potassium ions.

Abstract: The present disclosure relates to a method for the production of drinking water with high silicate content, including the steps of mixing demineralised raw water and a waterglass solution comprising sodium and/or potassium silicate; and subjecting at least one part of the mixture to an ion exchange process to reduce the concentration of sodium and/or potassium. Furthermore, the present disclosure relates to a device for the production of drinking water with high silicate content, the device including a mixing device for mixing demineralised raw water and a waterglass solution comprising sodium and/or potassium silicate, an ion exchanger to subject at least one part of the mixture to an ion exchange process to reduce the concentration of sodium and/or potassium.

Abstract: A method for testing the integrity of a hollow fibre membrane includes inserting a sterile, monomolecular gas into an interior of the hollow fibre membrane, applying a starting gas pressure on the gas in the interior of the hollow fibre membrane at a first point in time, and measuring the pressure of the gas at a second point in time after the first point in time so as to determine a final gas pressure.

Abstract: The disclosure relates to a filter module comprising a filter housing sealable in a pressure-tight manner, and a heating device for heating a fluid in the filter housing. The disclosure further relates to a method for sterilizing a filter module comprising the steps of: sealing a filter housing in a pressure-tight manner, heating fluid in the filter housing to a sterilizing temperature, preferably in the range of 100° C. to 150° C., most preferably in the range of 121° C. to 140° C., and maintaining the sterilizing temperature of the fluid in a predetermined temperature range for a predetermined period, wherein the predetermined temperature range is preferably within 100° C. to 150° C., most preferably within 121° C. to 140° C., and wherein the predetermined period is preferably in the range of 1 minute to 60 minutes, most preferably in the range of 5 minutes to 20 minutes.

Abstract: A membrane filtration module including a membrane element for filtering a liquid, a discharge pipe for the permeate or filtrate, and a connection device for joining a conduit to the discharge pipe, where the surface shell of the discharge pipe along a first longitudinal part is surrounded by the membrane element, where in a second longitudinal part the discharge pipe protrudes over the membrane element, and where the connection device in the region of the second longitudinal part is joined to the discharge pipe.

Abstract: A method for producing filtered liquid, in particular sterile water, in a filtration device with at least one membrane unit during in each case a production cycle delimited by membrane backwash cycles of each membrane unit, in the production process at least one respective production liquid volume of a production cycle is temporarily stored before release for consumption until a verification of sterility has been obtained for the temporarily stored production liquid volume. In the device a membrane backwash system and a sterile-air test device are assigned to each membrane unit and at least one temporary store having a capacity corresponding at least to the production liquid volume arising during the production cycle is connected downstream.

Abstract: A method for recycling cleaning or rinsing water, in particular rinser water, as well as a corresponding device for carrying out the method, where, for reducing the amount of water, first filtering water with a reverse osmosis system, then providing the permeate with an additive acting in a sanitizing or disinfecting manner, to then use the permeate loaded with the additive as cleaning or rinsing water and at least join a portion of the used cleaning or rinsing water with the concentrate in a reverse osmosis system, and filtering the mixture then by means of the reverse osmosis system.

Abstract: A water-filtering method has effectiveness and reduced contamination, and is in particular an ultrafiltration method, and a filtration system contains a plurality of individual filtration modules, each of which is supplied with untreated water via at least one untreated water inlet, and whose filtrate is removed via a filtrate outlet. The filtration modules are backwashed with filtrate, and are divided into groups, wherein during backwashing, each group is individually separated from the untreated water inflow and rinsed with the filtrate that is produced by the remaining groups and fed back during the backwashing.

Abstract: A method of controlling a separation unit, having a reverse osmosis element, a raw water pump, a concentrate and permeate outlet conduit, where a predetermined yield is substantially kept constant, and where the raw water pump is controlled in response to a flow rate measurement of the raw water between the raw water pump and the reverse osmosis element.