For inland reverse osmosis (RO) systems, brine disposal is often difficult and costly, and there is significant interest in increasing recovery and reducing brine volumes. The City of Buckeye, AZ owns brackish wells that have trace amounts of arsenic, nitrate, and various metals, and is considering RO treatment for these wells. Stantec performed a ...

We will present on the value proposition of "printed" membrane materials for desalination applications. In particular, we will focus on the polyamide TFC membrane (RO) that can be printed using an additive approach that enables precise control of thickness and roughness. Through this talk, we will emphasize the opportunities that such a manufacturi...

Contaminants of emerging concern (CECs) are believed to be detrimental to aquatic wildlife health and pose a human health risk. Existing conventional water treatment plants are not designed to remove CECs. Therefore, several advanced treatment methods, including reverse osmosis have been proposed for the removal of CECs.The paper will present two p...

Our Specialty Membrane product line consists of elements with a distinct membrane construction, specializing in unique industrial application needs. The Specialty Membrane Elements helps: to maximize recovery and separation of valuable compounds, minimize overall system CAPEX while reducing environmental footprint, reduce OPEX by lowering overall e...

The City of Signal Hill's nanofiltration plant was designed and built primarily for color removal and some total dissolved solids reduction. The plant was successfully built and started up over two years ago. After more than one year of operation the plant was cleaned for the first time. This paper will present information on the plant design and o...

The Sweetwater Authority owns and operates a 10 mgd groundwater desalter in Chula Vista,CA. The facility has a unique characteristic with three reverse osmosis trains operating with four hundred square foot membranes and the remaining three trains operating with four hundred and forty square foot membranes. Over the last two years of operation, dat...

In this work, a new approach for the anti-biofouling modification of the feed spacer surface has been proposed. Hydrophilic and zwitterionic sulfobetaine methacrylate-based coatings were generated by the combination of atmospheric pressure plasma treatment in air and followed by dip coating. The anti-adhesion properties of the modified specimens we...

Inspired by natural, biological systems, this work seeks to develop hypochlorite-resistant reverse osmosis (RO) membranes. Such membranes would be protected from the irreversible damage typically caused by reactive chlorine species, allowing hypochlorite to be used for biofilm prevention and treatment in RO systems....

This paper describes how coagulant dose in an ultrafiltration system can be automatically adjusted by means of inline UV monitoring. In this way chemical consumption is minimized while ensuring an optimal water quality and minimal membrane fouling....

The paper presents suggestions for improving operations of MF/UF membrane-based treatment plants based on the author?s 35 years of experience with the goals of making the operator?s work life easier, lowering operating costs, and facilitating reliable plant performance with stable capacity. Suggestions include: periodic archiving of plant setpoint ...

A unique screen flushing mechanism enables a reliable continuous operation of a very fine screen (<10?m) filter, placing an interesting alternative to the conventional use of disposable cartridge filters for RO pre-treatment. Pilot results from a seawater desalination plant in Israel show that the desired filtrate quality can be obtained, while the...