reverse osmosis nanofiltration Articles

Nanotechnology in water treatment: an emerging trend

With advances in nanotechnology, different types of nanomaterial are emerging for applications in water purification and water treatment devices owing to their effectiveness against both chemical and biological contaminants. This paper discusses the application of nanoscale materials that are being evaluated or developed as functional materials for water treatment, e.g. nanomembranes ...

Sep. 13, 2010

By Inderscience Publishers

Innovative seawater intake for reverse osmosis desalination plants

Seawater desalination plants typically consist of four major unit operations: seawater intake, pretreatment, Reverse Osmosis (RO) stage, and posttreatment and brine discharge. The best way is to go through vertical beach wells, but the increase of the production capacity of the plants built in recent years makes open intake the only solution. These open ocean intakes draw seawater through the ...

Jun. 26, 2008

By Inderscience Publishers

Industrial water reuse opportunities and high temperature compatible membranes

Process condensates represent a real value to the industry as it usually contains several items of potential savings, including but not limited to heat energy and water. In most cases the condensate has become contaminated with unwanted particles or with product carryover making it unfit for direct reuse in the process or as boiler makeup water. Conventional methods use heat exchangers for ...

Mar. 1, 2010

By IWA Publishing

Remediation of simazine from water through low-pressure thin film composite membrane using surfactants

The investigation was carried out to remediate simazine from water by the pressure driven filtration techniques (viz. nanofiltration, reverse osmosis). The separation of simazine through the membranes showed similar trend as glucose (organic marker) and salt. Surfactant-mediated filtration showed better performance of the membranes, though it depends on the nature of membranes and surfactants. ...

Dec. 3, 2009

By Inderscience Publishers

Prediction of flux decline during membrane filtration of leather plant effluent

A membrane-based scheme has been proposed for the treatment of leather plant effluent. The effluent coming out from the various steps of leather plant are combined and Nanofiltration (NF) and Reverse Osmosis (RO) are adopted. Performances of two NF membranes are evaluated. Experiments are conducted using an unstirred batch cell. It is observed that a combined operation of NF using 400 MWCO ...

Dec. 12, 2011

By Inderscience Publishers

Organic Membrane

Ceramic membrane technology and organic membrane technology can be used in combination. Organic membrane can follow ceramic membrane. We have organic membranes with wide range of pore sizes to different applications, from removing salt to filtering large particulates. JIUWU company can help you design the suitable membrane process. OVER VIEW OF ORGANIC MEMBRANES The application of membrane ...

Mar. 20, 2019

By Jiangsu Jiuwu Hi-tech Co

A New Fast Acting Low PH Cleaner Paves the Way for a New Cleaning Philosophy for Integrated Membrane Systems

Abstract For many years ultrafiltration/microfiltration (UF/MF) has been replacing multi-media filtration as a seawater reverse osmosis (RO) or nanofiltration (NF) pre-treatment system. Initially the systems were treated as individual unit operations and optimized as such. However, the similarity in the flux maintenance requirements of the particle removal membranes and the desalination ...

Nov. 5, 2019

By Avista Technologies, Inc.

Don`t fall foul of biofilm through high TEP levels

Biological fouling caused by the growth of biofilm on Reverse Osmosis (RO) and nanofiltration (NF) membranes can be amajor problem in desalination and water purification plants. Biofilm development lowers filtration efficiency and eventually the membranes must be replaced. Biofilm is usually made up of layers of assorted microbial populations, mostly bacteria,held together in a sticky matrix of ...

May 1, 2005

By Israel Oceanographic and Limnological Research (IOLR)

Seawater desalination technologies

The distribution of the total water available in various places on the earth is delineated in this paper. This paper discusses various desalination technologies like membrane technology and thermal technology. Membrane technology includes Reverse Osmosis and Nanofiltration, Electrodialysis and Electrodialysis Reversal, whereas thermal technology includes Multi-Stage Flash (MSF) Distillation, ...

Sep. 10, 2008

By Inderscience Publishers

Removal of Cd(II) ions from aqueous solution and industrial effluent using reverse osmosis and nanofiltration membranes

Industrial effluents loaded with cadmium have contributed to the pollution of the environment and health troubles for humans. Therefore, these effluents need treatment to reduce cadmium concentration before releasing them to public sewage. The purpose of the research is to study the major role of reverse osmosis (RO) and nanofiltration (NF) processes, which can contribute to the removal of ...

Jun. 29, 2015

By IWA Publishing

Removal of Cd(II) ions from aqueous solution and industrial effluent using reverse osmosis and nanofiltration membranes

Industrial effluents loaded with cadmium have contributed to the pollution of the environment and health troubles for humans. Therefore, these effluents need treatment to reduce cadmium concentration before releasing them to public sewage. The purpose of the research is to study the major role of reverse osmosis (RO) and nanofiltration (NF) processes, which can contribute to the removal of ...

Jun. 29, 2015

By IWA Publishing

Boron removal from brackish water by reverse osmosis and nanofiltration membranes: application of Spiegler–Kedem model and optimization

Drinking water should contain certain chemicals only in limited quantities. Boron, one of these chemicals which is considered as a threatening compound and is difficult to eliminate from water. The purpose of the research is to study the major role of reverse osmosis (RO) and nanofiltration (NF) process which can contribute to the removal of this inorganic element from brackish water. For ...

Dec. 18, 2015

By IWA Publishing

Efficiency of RO/NF membranes at the removal of veterinary antibiotics

The production of pharmaceuticals has increased rapidly during the last several decades as they have been used for the health of both humans and animals. Routes of environmental exposure include the release of treated wastewater, the land disposal of livestock manures and municipal biosolids (i.e. sewage sludge), as well as the use of medicated aquaculture feed. This study deals with application ...

Jan. 1, 2012

By IWA Publishing

Membrane bioreactor application within the treatment of high-strength textile effluent

A pilot-scale dual-stage membrane bioreactor (dsMBR) incorporating two ultra-filtration (UF) side-stream membrane modules was designed, constructed, operated and evaluated on-site for treating high-strength textile effluent. The effluent stream was characterised by a COD range of between 45 to 2,820 mg/L and an average BOD of 192.5 mg/L. The dsMBR achieved an average COD reduction of 75% with a ...

Feb. 1, 2012

By IWA Publishing

Desalination and water recovery: control of membrane fouling

Ultrafiltration (UF), Nanofiltration (NF) and Reverse Osmosis (RO) technologies are widely used for the production of safe drinking water, and for the recovery of reusable water from various industrial effluent streams. The most commonly encountered phenomenon in these processes, especially in water recovery application, is membrane fouling, and control of membrane fouling is regarded as a ...

Apr. 11, 2006

By Inderscience Publishers

Nanjing Leachate Brine Reduction Project

Application: Landfill Leachate Concentrate Scale: 100 tons / day Process: DTRO Time: 2015 INTRODUCTION Processing scale: 100 tons / day Treatment Process: DTRO Landfill Leachate Concentrate Treatment System The original process of the project was a nanofiltration reverse osmosis system. Because the amount of concentrated water exceeded the digestive capacity of the plant, Jiarong Landfill ...

May 27, 2020

By Xiamen Jiarong Technology Corp., Ltd.

Effect of water quality of antibiotics by RO/NF

This study addresses the possibility for nanofiltration (NF) and reverse osmosis (RO) membrane processes to serve as an alternative to remove low levels of selected antibiotics from wastewaters and surface waters given changing water conditions such as pH and presence of natural organic matter (NOM). Preliminary experimental results obtained with a dead-end filtration apparatus suggest that ...

Sep. 12, 2005

By Toray Chemical Korea

Role of membranes and activated carbon in the removal of endocrine disruptors

As part of an American Water Works Association Research Foundation (AwwaRF) research project to evaluate conventional and advanced treatment processes for the removal of endocrine disruptors and pharmaceuticals (Project #2758), several experiments were conducted using membranes and activated carbon. A series of dynamic flow-through membrane experiments were performed at pilot- and full-scale to ...

Nov. 10, 2007

By Toray Chemical Korea

Designed for a Challenge – New Dow Product Line Helps Maximize Industrial Water Recovery, Minimize Waste

Cost of water on the front end and discharge fees on the other end are squeezing industrial water users. Increasing water efficiency is a clear solution but facilities reusing and recycling must now treat water that is more fouled and more expensive to treat. To help alleviate these challenges in the market, Dow Water & Process Solutions, a business unit of The Dow Chemical Company (NYSE: ...

Sep. 19, 2016

By DuPont Water Solutions

Comparison of optional process configurations and operating conditions for ceramic membrane MF coupled with coagulation/flocculation pre-treatment for the removal of NOM in drinking water production

The increase of Natural Organic Matter (NOM) in natural water sources, partly caused by progressing climate change issues, is a growing concern for drinking water production. In recent years, membrane technology like Reverse Osmosis (RO) or Nanofiltration (NF) has been successfully applied as a robust solution for NOM removal to produce potable water. However, coagulation/flocculation ...

Mar. 1, 2010

By IWA Publishing