A process for separating a gaseous or liquid mixture by means of a separating device including a first volume and a second volume which are separated by a membrane which has selective permeability with respect to at least two components of the mixture, comprising the following steps: a) fill up the first volume of the device with the mixture to be separated; b) wait for a period of time which is in excess of the permeation lag time, but is insufficient to reach a state of equilibrium, during which time a fraction of each component of the mixture passes from the first to the second volume of the device through the membrane; and c) evacuate the first and the second volume of the device, as a result of which at least one first and one second cut of the mixture is obtained, having different molar compositions.

In a membrane filtration system and process, retentate exiting a filtration element is maintained inside a loop and redirected back to the inlet of a pump. The pump may produce a generally constant velocity in the loop. Water is concentrated inside the loop until discharged in batches. Feed water enters the loop automatically. The flux through the filtration element is maintained by a controlled valve or pump in communication with a permeate outlet. A filtration element has one or more rigid inserts in a housing. The inserts are covered with membranes. The element is configured to provide open feed channels beside the inserts. The membranes and inserts are potted at an edge, which may be their only attachment to the housing. Permeate flows between the membrane and the insert to the potted edge. The filtration element may be used in the system and process described herein or in others.

A perfusion bioprocessing system (10) includes a bioreactor (12) and a recirculation flow path (14) provided with at least one first feed flow control device (46) and at least one second feed control device (48). The perfusion bioprocessing system (10) further includes a first tangential flow filter (16) coupled to the bioreactor (12) via the recirculation flow path (14) and a second tangential flow filter (18) coupled to the bioreactor (12) via the recirculation flow path (14). The first tangential flow filter and the second tangential flow filter are coupled to a permeate flow path and a retentate flow path.

A multi-stage filtration apparatus (100) for heterogeneous food admixtures comprises supply means (I1) for introducing a input heterogeneous admixture (All) being introduced to the multi-stage filtration apparatus (100), a pre-filtration station (M1) which is intended to receive the input heterogeneous admixture (All) being introduced and to separate it into a first admixture portion (Filtr1) and a residual solid admixture portion (Sol1), a filtration station (M2) comprising at least one tangential filter (F1) which is provided to separate from the first admixture portion (Filtr1) a concentrated suspension portion (Concentrata) and a final filtered portion (Finale), at least one supply device (I2) which is provided to circulate the first admixture portion (Filtr1) in the filtration station (M2). The pre-filtration station (M1) comprises at least one vibrating sieve (V1) in order to separate the heterogeneous admixture (All).

A reciprocating concentration system includes: a gas output device, first and second liquid accommodating tanks, a selection device, first and second liquid sensors and a computing control device. The gas output device is controlled to output pushing gas through a first gas channel or a second gas channel. The first liquid accommodating tank is in communication with the first gas channel. The second liquid accommodating tank is in communication with the second gas channel. The selection device is in communication with the first liquid accommodating tank and the second liquid accommodating tank through a first liquid channel and a second liquid channel, respectively, and has a filtered liquid outlet. The first liquid sensor and the second liquid sensor are disposed at the first liquid channel and the second liquid channel, respectively. The computing control device is connected to the gas output device and the first and the second liquid sensors.

The present invention relates to a method and system for reducing water consumption in a membrane dealcoholization process. The system comprises a dealcoholization section and a polishing section, where the polishing section comprises one or more membrane polishing units with recirculation of streams.

The present disclosure is directed to filtering technologies that combine elements of continuous and batch NF/RO based on the constraints of the end-user facility to achieve a target balance between, for instance, recovery and power consumption, and to reduce long term operating cost of a plant. A method for extending batch operation into a second induction period with antiscalant injection is also disclosed herein, with the second induction period allowing for yet higher water recovery.