Abstract: The present invention relates to a mobile system for continuous, automatic, online monitoring of water quality and particle sampling in a drinking water distribution network, comprising: a mobile unit provided with means for supplying, from at least a selected one of the plurality of points in the drinking water distribution network, a corresponding, selected influent fluid sample stream; means for discharging a corresponding, selected effluent fluid sample stream; for each selected influent fluid sample stream, a respectively associated continuous monitor module.

Abstract: The present invention relates to a method for the production of drinking water. In addition, the present invention also relates to the use of minerals extracted from a feed water stream by using a combination of a Donnan dialysis unit and a membrane unit as a source of minerals for the production of drinking water originating from said feed water stream.

Abstract: The present invention relates to a mobile system for continuous, automatic, online monitoring of water quality and particle sampling in a drinking water distribution network, comprising: a mobile unit provided with means for supplying, from at least a selected one of the plurality of points in the drinking water distribution network, a corresponding, selected influent fluid sample stream; means for discharging a corresponding, selected effluent fluid sample stream; for each selected influent fluid sample stream, a respectively associated continuous monitor module.

Abstract: The present invention relates to a system for monitoring fouling issues in a drinking water distribution network, said drinking water distribution network comprising a water mass flow meter having a water inlet and a water outlet, said water mass flow meter being located at a customer, wherein upstream from said water mass flow meter a filter device is positioned, said filter device being provided with a pre-pressure sensor and a post-pressure sensor.

Abstract: The present invention relates to a method for purifying water using at least one unit for trapping one or more ions and at least one membrane filtration unit, wherein an aqueous stream is withdrawn from a source and is fed to the aforementioned unit for trapping one or more ions, wherein the aqueous stream leaving the aforementioned unit is fed to the aforementioned membrane filtration unit, and at least one concentrate stream and one permeate stream are obtained in said membrane filtration unit, wherein at least part of the aforementioned one or more ions that are trapped is added to the aforementioned permeate stream to obtain a permeate stream enriched with one or more ions.

Abstract: The present invention relates to a method for purifying water using at least one unit for trapping one or more ions and at least one membrane filtration unit, wherein an aqueous stream is withdrawn from a source and is fed to the aforementioned unit for trapping one or more ions, wherein the aqueous stream leaving the aforementioned unit is fed to the aforementioned membrane filtration unit, and at least one concentrate stream and one permeate stream are obtained in said membrane filtration unit, wherein at least part of the aforementioned one or more ions that are trapped is added to the aforementioned permeate stream to obtain a permeate stream enriched with one or more ions.

Abstract: A method and device for the cleaning of spiral wound membranes. In the device two or more spiral wound membranes are included in series in pressure tubes. The membranes are cleaned by longitudinal rinsing with water, in which a well-dissolvable gas has been dissolved. In the device for the purification of an aqueous fluid with spiral wound membranes, the membranes can be longitudinal rinsed with water, in which a well-dissolvable gas has been dissolved. As gas that is well-dissolvable preferably CO2 gas or a mixture of gasses is used.

Abstract: A method and device for the cleaning of spiral wound membranes. In the device two or more spiral wound membranes are included in series in pressure tubes. The membranes are cleaned by longitudinal rinsing with water, in which a well-dissolvable gas has been dissolved. In the device for the purification of an aqueous fluid with spiral wound membranes, the membranes can be longitudinal rinsed with water, in which a well-dissolvable gas has been dissolved. As gas that is well-dissolvable preferably CO2 gas or a mixture of gasses is used.

Abstract: An apparatus for purifying water, comprising an ion exchanger with a water inlet and a product outlet, connected to an inlet of a first filtration step, which comprises one or more nano- and/or RO-filtration membranes and is provided with a first permeate outlet and a first concentrate outlet. According to a first embodiment, the apparatus comprises a subsequent filtration step in which an inlet is connected with the first concentrate outlet, which subsequent filtration step comprises one or several subsequent nano- and/or RO-filtration membranes, and which is provided with a second permeate outlet and second concentrate outlet, which second concentrate outlet is optionally connected with an inlet of a subsequent filtration step.

Abstract: A novel method for purifying, by means of an essentially closed circuit water purification system, an aqueous flow from a processing unit includes the steps of: (a) supplying to a bioreactor, and combining therein, the aqueous flow, as well as a discharge flow from a membrane filtration unit; (b) allowing microbiological conversion of biodegradable constituents to take place therein, thereby, generating an effluent flow; (c) supplying the bioreactor effluent flow to an ultrafiltration unit, thereby, separating the effluent flow into permeate and concentrate flows; (d) supplying at least some of the permeate flow to a membrane filtration unit, thereby, generating a product flow and the discharge flow; and (e) supplying the discharge flow to the bioreactor, as noted in step (a), and supplying at least a portion of the product flow to the processing unit. Apparatus related thereto are also disclosed.

Abstract: A process is provided for the removal of organic substances (TOC), pesticides or other specific compounds from an aqueous salt solution, for example from a regenerate derived from water purification. The TOC-containing aqueous salt solution is treated in a desalination membrane according to the dead-end principle, wherein neither longitudinal flow over the membrane with air and/or water, nor continuous concentrate discharge takes place, after which the obtained permeate is reused, and the concentrate obtained after flushing is discharged. The TOC-containing aqueous salt solution is introduced at the feed side of the membrane module at a flux of 5-75 1/m2·h, a feed pressure of 4-12 bars for 30-40 minutes, while the obtained TOC-depleted permeate is discharged. Preferably, operation takes place at a flux of 15-25 1/m2·hr, a pressure of approximately 8 bars, and the duration of treatment is approximately 30 minutes.

Abstract: The present invention relates to a method for purifying water, in particular ground water, under anaerobic conditions, using a membrane filtration unit, wherein the following steps are carried out: 1) connecting the membrane filtration unit (8) to a rinsing unit (11); then 2) passing a rinsing agent from the rinsing unit (11) through the membrane filtration unit (8) so as to create anaerobic conditions in the membrane filtration unit (8); and 3) passing the water to be purified through the membrane filtration unit (8), in which anaerobic conditions have thus been created in step 2), wherein the connection (12) between the membrane filtration unit (8) and the rinsing unit (11) is then shut off so that the anaerobic conditions in the membrane filtration unit (8) obtained in step 2) are maintained while the water to be purified is passed through said membrane filtration unit (8).

Abstract: The invention relates to a method for decoloring liquids, in particular ground water, by means of a membrane filtration unit, wherein the following steps are carried out: i) subjecting the ground water to a biological treatment in a bioreactor; ii) feeding the effluent from the bioreactor of step i) to the membrane filtration unit, in which membrane filtration unit a separation between biomass and decolored ground water takes place; followed by iii) feeding back the biomass from step ii) to the bioreactor. The invention also relates to decolored ground water and to a device for decoloring liquids.

Abstract: The invention relates to a coupling unit for coupling two tubular membrane elements of the kind used in membrane filter technology, forming extensions of one another. The coupling unit comprises a jacket piece which is provided at both its ends with sealing surfaces intended to engage the facing ends of the membrane elements to be coupled thereto. The sealing surfaces may be formed on the interior peripheral wall of the jacket piece to engage the exterior peripheral wall of the ends of the membrane elements. However, the sealing surfaces may also be formed on the cross-cut end surfaces of the jacket piece, and engage the cross cut end walls of the membrane elements. The interior of the jacket piece may comprise an axially extending conduit portion to communicate with corresponding flow conduits in the membrane elements.