Provided is a reciprocating submerged membrane filtration apparatus including: a membrane tank comprising a submerged membrane and configured to intake influent wastewater to be treated, the influent wastewater being filtered through the submerged membrane to produce treated water; and a reciprocation apparatus configured to move the membrane to create an inertia force which shakes foulants off from the submerged membrane under oxygen-deficient conditions, wherein the submerged membrane comprises a microfiltration (MF) membrane or an ultrafiltration (UF) membrane.

A method of recovering a metal from a low-grade ore which is subjected to cyanide leaching to produce a PLS which contains a metal cyanide which is removed from the PLS by ultrafiltration and nano-filtration, and then acidified and sulphidised to produce a metal sulphide from which the metal is extracted, and hydrogen cyanide which is recycled to the cyanide leaching step.

A mobile processing system is disclosed for the removal of radioactive contaminants from nuclear process wastewater. The system is fully scalable, modular, and portable allowing the system to be fully customizable according to site-specific remediation requirements. It is designed to be both transported and operated from standard sized intermodal containers or custom designed enclosures for increased mobility between sites and on-site, further increasing the speed and ease with which the system may be deployed. Additionally, the system is completely modular wherein the various modules perform different forms or stages of wastewater remediation and may be connected in parallel and/or in series. Depending on the needs of the site, one or more different processes may be used. In some embodiments, one or more of the same modules may be used in the same operation.

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.

Provided is a reciprocating submerged membrane filtration apparatus including: a membrane tank comprising a submerged membrane and configured to intake influent wastewater to be treated, the influent wastewater being filtered through the submerged membrane to produce treated water; and a reciprocation apparatus configured to move the membrane to create an inertia force which shakes foulants off from the submerged membrane under oxygen-deficient conditions, wherein the submerged membrane comprises a microfiltration (MF) membrane or an ultrafiltration (UF) membrane.

An aim of the disclosure is to control a water purification apparatus that uses reverse osmosis (RO) to consistently produce permeate water with a desired quality. The permeability of a RO membrane varies with a temperature of feed water. Hot water has a lower viscosity and a higher diffusion rate than cold water. The pores of the RO membrane expand at higher temperatures, causing a higher flow through the RO membrane from a feed to a product side. Consequently, higher temperatures cause higher permeate flow over the RO membrane and increased salt passage through the RO membrane. In order to improve the salt rejection rate, more permeate water needs to pass through the RO membrane to dilute the salts. This is achieved by increasing feed side pressure when the RO membrane temperature increases, thereby causing an increased flow of permeate water.

A mobile processing system is disclosed for the removal of radioactive contaminants from nuclear process wastewater. The system is fully scalable, modular, and portable allowing the system to be fully customizable according to site-specific remediation requirements. It is designed to be both transported and operated from standard sized intermodal containers or custom designed enclosures for increased mobility between sites and on-site, further increasing the speed and ease with which the system may be deployed. Additionally, the system is completely modular wherein the various modules perform different forms or stages of wastewater remediation and may be connected in parallel and/or in series. Depending on the needs of the site, one or more different processes may be used. In some embodiments, one or more of the same modules may be used in the same operation.

The present invention provides a new membrane separation system suitable for efficiently separating a volatile organic compound from an aqueous solution containing the organic compound. A membrane separation system of the present invention includes a first membrane separation device having a first separation membrane, a separation vessel for phase-separating an aqueous solution into an aqueous phase and an organic phase, a second membrane separation device having a second separation membrane, a first permeated fluid feed passage, and a second permeated fluid feed passage. The second permeated fluid feed passage is connected to the second membrane separation device and at least one selected from the group consisting of the first permeated fluid feed passage and the separation vessel.