A tubular membrane pervaporation separation system, comprising a heater, one or multiple membrane separators arranged in parallel, a condenser and a vacuum pump; the separator comprises a vacuum vessel, a concurrent heating vessel and one or multiple pervaporation lines arranged in parallel; the line comprises membrane tube bundle modules and concurrent heating modules connected in series or in a series-parallel hybrid form, in the line, the membrane tube bundle modules are arranged between two adjacent concurrent heating modules; the vacuum vessel is connected to the condenser and the vacuum pump in sequence; the concurrent heating vessel is provided with an inlet and an outlet; one end of the line is connected to the heater and the other end is used to discharge; the modules are placed respectively in the vacuum vessel and the concurrent heating vessel, comprise one or multiple membrane tubes and concurrent heating tubes arranged in parallel respectively.

The present invention is in the field of a system for gas recovery from wastewater, a method for treating wastewater, and a method wherein ammonia and carbon dioxide are recovered. Typically a wastewater stream is fed into the system, treated and stripped from ammonia and carbon dioxide, and a cleaner stream is released.

An air channel membrane distiller (1) comprises a hot surface (12), a cooling section (20) and a hydrophobic membrane (30). The hot surface and the hydrophobic membrane define a sealed evaporation channel (40). A surface (22) of the cooling section and the hydrophobic membrane define a sealed condensation channel (50). A water supply tubing (42) is connected to the evaporation channel. A water discharge tubing (46) is connected to the evaporation channel. A purified-water discharge tubing (56) is connected to the condensation channel. The surface of the cooling section is given a temperature lower than a temperature of water in the evaporation channel. A gas supply arrangement (60) for inert gas comprises a heater (62). A gas pipe system (64) is arranged to a gas inlet (55) of the condensation channel for enabling flushing of at least the condensation channel with the inert gas.

Disclosed herein is a process for de-watering a sludge. The process comprises heating a de-watering fluid, and passing the de-watering fluid through the sludge, thereby de-watering the sludge. Also disclosed herein is a system for de-watering a sludge and a sludge which is at least partially de-watered according to the process.

Disclosed herein is a polycrystalline metal-organic framework membrane comprising a substrate material having a surface and a polycrystalline metal-organic framework attached to the surface of the substrate material, wherein the polycrystalline metal-organic framework is formed from a secondary building unit having the formula Ia or IIb and a ligand as defined in the application.

This document describes systems and methods for treating and recovering water from feed solutions using a multilayer module with an expansion chamber. The multilayer module comprises a feed spacer layer, a permeate spacer layer and a membrane layer, wherein water vapor evaporated from the feed solution in the feed spacer passes through the membrane layer into the permeate spacer layer. The expansion chamber receives the water vapor from the permeate spacer layer and the feed solution from the feed spacer layer.

A membrane for water collection may include a sheet having a top surface and a bottom surface, and a plurality of conical structures disposed on the top surface of the sheet, the conical structures comprising a hydrogel material. Each conical structure of the plurality of conical structures may have a height of 1 mm to 50 mm, wherein height is measured from the top surface of the sheet to an apex of a conical structure. Each conical structure of the plurality of conical structures may have an apex angle of 10 to 60 degrees.

Composite polyether block amide (PEBA) copolymer tubes incorporate an ultra-thin PEBA layer that enables rapid moisture transfer and exchange through the tube. A composite PEBA film may include a porous scaffold support and may be formed or incorporated into the composite PEBA tube. A porous scaffold support may be coated or imbibed with PEBA to form a composite PEBA film. A composite PEBA film may be wrapped on a mandrel or over a porous scaffold support to form a composite PEBA tube. A film layer may be applied over a wrapped composite PEBA film to secure the layers together. The film layer by applied by dipping, spraying or painting.

Composite polyether block amide (PEBA) copolymer tubes incorporate an ultra-thin PEBA layer that enables rapid moisture transfer and exchange through the tube. A composite PEBA film may include a porous scaffold support and may be formed or incorporated into the composite PEBA tube. A porous scaffold support may be coated or imbibed with PEBA to form a composite PEBA film. A composite PEBA film may be wrapped on a mandrel or over a porous scaffold support to form a composite PEBA tube. A film layer may be applied over a wrapped composite PEBA film to secure the layers together. The film layer by applied by dipping, spraying or painting.

An atmospheric water generation system absorbs water from an atmospheric air stream into a desiccant flowing along a flow path of a closed desiccant circulation loop. To ensure that the desiccant remains within the closed desiccant circulation loop, the atmospheric water generation system encompasses a membrane-based water extraction device that the desiccant flows through. The desiccant flows through the membrane-based water extraction device on a first side of a membrane, and the membrane separates the desiccant from a water-collection flow. Water absorbed into the desiccant passes from the desiccant, through the porous membrane, and into the water-collection flow, at least in part due to differences in temperature and/or pressure characteristics of the water flow and the desiccant flow. Water collected within the water-collection flow is directed to a storage tank for usage.