Nanyang Technological University

William Bernard Krantz

Anthony Gordon Fane

Ebrahim Akhondi

Jia Wei Chew

Tzyy Haur Chong

Farhad Zamani

Siew Leng Loo

Xiao Hu

Chee Kai Chua

Chuyang Tang

Jia An

Filicia Wicaksana

Wen See Tan

Victor Siang Tze Sim

Stanislaus Raditya Suwarno

Adrian Piah Song Yeo

Weiyi Li

Yong Zen Tan

Yi-Ning Wang

Teik Thye Lim

Jian Yuan Lee

A cross-flow membrane filtration channel defined by at least one membrane, wherein at least one surface of the channel is inclined at an angle away from a centreline of the channel in a direction of feed flow in the channel.

Cross-flow membrane filtration channel

An apparatus for reverse osmosis, the apparatus comprising: a single-stage reverse osmosis (SSRO) unit; and a counter-current membrane cascade with recycle (CMCR) unit comprising a plurality of stages of reverse osmosis including at least a first stage and a second stage wherein permeate from the first stage is configured to be introduced as feed to the second stage; wherein retenate from the SSRO unit is configured to be introduced as feed to the first stage, and wherein product obtained using the apparatus comprises permeate from the SSRO unit and permeate from a last stage of the CMCR unit.

Apparatus and method for reverse osmosis

In the present invention, a method for determining at least one pore-related parameter of a porous structure is provided. In a preferred embodiment, an enhanced evapoporometry (EP) technique is provided to determine pore size distribution of continuous pores of a porous structure. In this enhanced EP technique, a volatile liquid, such as isopropoyl alcohol or water, is supplied to one side of a porous structure in order to enable the volatile liquid to penetrate and saturate the porous structure through capillary force. Thereafter, an immiscible non-volatile liquid, such as glycerol, mineral oils, silicon oils or hydrophilic ionic liquid, is supplied to the one side of the porous structure. As the volatile liquid evaporates progressively from the filled pores, the emptied pores may be immediately filled by the non-volatile liquid drawn upwards by capillary action. This prevents formation of a t-layer formed from the adsorption of vapour emanating from the volatile liquid that is used to saturate the pores.

Method and arrangement for determining at least one pore-related parameter of a porous structure

The invention relates to an antibacterial cryogel, its preparation method, and its use for disinfecting water. The invention further relates to an antibacterial porous hydrogel.

Antibacterial cryogel and porous hydrogel, their preparation method, and their use for disinfecting water

In various embodiments, a method for determining at least one pore-related parameter of a porous structure is provided. The method includes supplying a volatile liquid into a chamber. The method also includes coating a first surface of the porous structure with an evaporation preventing substance. The method further includes placing the coated porous structure within the chamber. The method additionally includes determining an effective mass of the chamber over a period of time. The method also includes determining the at least one pore-related parameter of an uncoated second surface of the coated porous structure based on the effective mass determined. The second surface of the porous structure is opposite the first surface of the porous structure.

A spacer for a membrane module, the spacer comprising: a plurality of first filaments defining a plurality of fluid flow channels, in use the plurality of fluid flow channels being adjacent a membrane of the membrane module; and a plurality of second filaments provided on the plurality of first filaments and extending into the fluid flow channels, the second filaments moveable relative to the first filaments in response to an external stimulus during flow of fluid in the fluid flow channels.

Spacer for a membrane module

A method for determining at least one pore-related parameter of a porous material is provided. The method includes supplying a volatile liquid into a chamber, placing a porous material within the chamber, spaced apart from and over the volatile liquid, determining an effective mass of the chamber over a period of time, and determining at least one pore-related parameter of the porous material based on the effective mass determined. An arrangement for determining at least one pore-related parameter of a porous material is also provided.

Method and arrangement for determining at least one pore-related parameter of a porous material

A method of determining a state of biofouling of a membrane is provided. The membrane is contained within a flow cell and the flow cell has an outer surface coupled to a tranducer, The method comprises introducing inorganic particles into the flow cell such that the inorganic particles form a part of a top surface of a foulant layer on the membrane. The transducer then emits acoustic waves towards the membrane and an acoustic signature of reflected sound waves are detected. A state of biofouling of the membrane is determined based on the detected acoustic signature. A method and an apparatus are also provided for determining a state of biofouling in commercial membrane modules such as spiral wounded membrane modules.

Growing community of inventors

Singapore, Singapore

William Bernard Krantz