Fouling, Saudi Arabia, Groundwater, Algae, Algae
Singapore's PUB draws curtain on algae
Singapore's national water agency PUB has for the first time installed silt curtains at the waters off Tuaspring and Singspring desalination plants, to protect them from damaging fouling of their reverse osmosis membranes by mounting levels of algae in the water.
Saudi boost for LiqTech ceramic membranes
The Saudi Arabian Ministery of Water & Electricity has announced that ceramic flat-sheet membranes are the technology of choice for groundwater applications, according to Danish company LiqTech International.
Ras Al Khaimah seawater desalination has algae shield
Northernmost of the United Arab Emirates (UAE), Ras Al Khaimah, has opened a 68 Ml/d seawater reverse osmosis (SWRO) project in Ghallilah on the emirate's west coast that is equipped to "overcome the red tide phenomena" - the seasonal proliferation of algae that blights the emirates' coastline.
Algae biomass membrane order for Denmark's LiqTech
Denmark's LiqTech International Inc has received a purchase order of around US$ 300,000 for a prototype filtration system to be used in an algae biomass project.
2014 Oman conference to look at HABs and desalination
An international conference on Harmful Algal Blooms (HABs) & Desalination is to be held in Muscat, Oman, in April 2014.
How we delivered Az Zour North phase one
"With hindsight we were very lucky to get everything through on time and that our construction partner Hyundai Heavy Industries was on time. Fortunately we escaped a lot of those little wrinkles that need sorting out during construction, and can drag on and on, and so we kept to time," says Andy Biffen, chief executive of project delivery vehicle Az Zour Shamal.
Spiral scoops innovation award for its 'disruptive' automatic self-cleaning filter
Spiral Water has picked up an Innovation Award from BlueTech Research for its automatic self-cleaning water filter, a "disruptive" new filter technology according to Spiral chief executive Ashwin Gulati.
Algae: a tide of trouble
The water services provider at the industrial port at Sohar in the Oman has learned the hard way, how to combat the seasonal algal wave that can grind vital reverse osmosis desalination and other water treatment to a halt. Despite unprecedented assaults the notorious Red Tide has been tamed. This article first appeared in the May 2015 issue of Desalination & Water Reuse magazine.
Abunayyan resigns as chair of ACWA Power Barka
Mohammad Abdullah Abunayyan has resigned as chairman and board director of ACWA Power Barka in Oman, citing personal reasons.
Suez Environnement lands US$ 200 million Middle Eastern deals duo
Suez Environnement has won a desalination contract in Abu Dhabi worth more than US$ 180 million and a separate water reuse deal in Oman taking the total value of the Middle East wins to more than US$ 200 million.
Xylem supplies wastewater denitrification systems in China
Water technology company, Xylem, has supplied denitrification systems to three wastewater treatment plants in eastern China as part of a national strategy to improve wastewater treatment by 90% over five years.
Electrochemical desalination MoU signed in Singapore
A memorandum of understanding (MoU) between Singapore's national water agency, PUB, and Evoqua Water Technologies to further develop electrochemical desalination technology was one of five MoUs signed during Singapore International Water Week, which ended on 5 June 2014.
Nanobubble specialist Moleaer raises capital, seeks people
Moleaer, the California, US-based water technology firm that developed the XTB Nanobubble Generator has raised $6 million to support overseas expansion.
Direct membrane filtration simplifies reuse process
Recent trials have proven that direct membrane filtration of high solids (algae) and disinfection provides a simpler treatment process with substantial cost reduction. In Pillbara, Australia, two plants are being constructed to treat wastewater for recycling aiming for a 4-log removal of bacteria and viruses by filtering alone. Ultraviolet treatment provides the final requirement to reach the required 6-log removal rate. This article gives an overview of the application, and details on the technology and design used. It first appeared in the August/September 2013 issue of Desalination & Water Reuse magazine.
Modern Water claims first FO commercial desalination contract
UK-based Modern Water has won what is believed to be the first ever forward-osmosis (FO) commercial contract for desalination, following its award of a UK£ 500,000 (US$ 810,000) contract for a 200 m³/d plant by Oman's Public Authority for Electricity & Water (PAEW).
RO-based advanced treatment plant for West Virginia mines
A 5 MGD (19,000 m³/d) membrane-based wastewater treatment plant is to be built to serve a number of coal mines in West Virginia, USA, as a result of government action following pollution violations.
HTI deal takes forward osmosis to China
The world's only commercial manufacturer of forward-osmosis (FO) membranes, modules and systems, Hydration Technologies Innovations LLC (HTI), reached an international distribution, services and cooperation agreement for FO technology with Chinese company Tri-Tech Holding Inc.
Nearly 200 abstracts received for AMTA/AWWA conference
The American Membrane Technology Association (AMTA) says that 193 abstracts have been received for its joint conference next year with the American Water Works Association (AWWA) in San Antonio, Texas.
AWA to hold membrane fouling master class
Membrane fouling is to be the subject of a master class to be held by the Australian Water Association (AWA) in November 2012.
H2O Innovation commissions pathfinding Indian membrane plant
Canada's H2O Innovation announced on 31 January 2011 that its Indian joint venture, H2O Innovation India Ltd, had commissioned the 7,000 m³/d membrane water treatment system it had designed for Larsen & Toubro Heavy Engineering (L&T) in Gujarat state.
MIT membrane start-up completes funding round
The conclusion of an initial round of funding for Clean Membranes Inc, a start-up company based in Lexington, USA, will permit progress on development of a new generation of non-fouling membranes usable for sea and brackish water desalination.
Korean membranes chosen for Iranian process water
CSM fouling-resistant reverse-osmosis membranes, manufactured by Woongjin Chemical of South Korea, have been selected for the Fajr Phase II Project in Iran to help reduce biological fouling and scaling.
Live Webinar Masterclass - Membrane Fouling Control
The first in a series of Desalination and Water Reuse Masterclass webinars will run on 12 February this year. Each event will offer practical, readily applicable guidance delivered by an expert in the topic covered.
Researchers uncover new membrane fouling mechanism
Researchers have uncovered "an additional reverse osmosis (RO) membrane fouling mechanism" arising from organic compounds present in ultrafiltration (UF) permeate during wastewater desalination.
SEDA to hold May Day membrane cleaning workshop
The Southeast Desalting Association is holding a workshop in Cape Coral, Florida, on 1 May 2014 focused on reverse osmosis (RO) membrane cleaning.
Melbourne researchers' anti fouling membrane claim
Researchers from the Melbourne School of Engineering at the University of Melbourne have developed what they claim to be an anti fouling microfiltration system that outstrips existing technology on energy efficiency with negligible compromise on performance.
SEDA December workshop to look at chemicals for RO
The Southeast Desalting Association (SEDA) has announced a technology transfer workshop on Chemical Treatment for Reverse Osmosis (RO) to be held in Palm Bay, Florida, in December 2013.
Four workshops to precede AMTA / AWWA conference
There are now four preconference workshops prior to the Membrane Technology Conference & Exposition being held by the American Membrane Technology Association (AMTA) and the American Water Works Association (AWWA) in San Antonio, Texas, at the end of February 2013.
Hyflux exits contract with SWCC amid company reorganisation
Hyflux has quit a contract with Saudi Arabia's Saline Water Conversion Corporation (SWCC) for three seawater reverse osmosis (SWRO) plants, amid moves to restructure the company.
Top 20 water-stressed countries with solar potential
The World Resources Institute (WRI) has named the world's top 20 most water-stressed countries which have the most solar energy potential.
Hitachi and Toray target 20 per cent RO energy reduction in Saudi demo
Hitachi and Toray are to demonstrate a low energy seawater reverse osmosis (SWRO) system in Saudi Arabia, in a project that will draw lessons from the Mega-ton Water System.
Piedmont signs new supply and distribution contracts
Piedmont, a producer of corrosion resistant equipment for desalination plants, has signed a roster of new supply and partner distribution agreements globally.
Saudi Arabia outlines privatisation plans for water, and more
Saudi Arabia has outlined its privatisation programme to generate SAR 35 to 40 billion ($9.3 to $10.7 billion) in non-oil government revenues by 2020.
OPWP signs ACWA Power, Veolia and Dhofar Development for Salalah project
Oman Power and Water Procurement Company (OPWP) has signed ACWA Power Saudi Arabia, Veolia Middle East, and Dhofar International Development and Investment, on a build, own and operate contract for Salalah Water Desalination Plant.
Suez and Middle East plants top 2018 Global Water Awards
Suez has scooped the Desalination Company of the Year Award, and Middle East facilities topped the desal plant categories at this year's Global Water Awards from Global Water Intelligence (GWI).
EOI request is out on Jubail phase 3 desal mega-project
Saudi Arabia's Water and Electricity Co has requested expressions of interest on Jubail phase 3, an integrated water and power project to include 1.17 million m3/d of desalination.
Saudi Arabia's WEC pre-qualifies bidders for Shuqaiq 3
Saudi Arabia's Water and Electricity Company (WEC) has pre-qualified 15 companies for Shuqaiq 3 desalination plant project.
SWCC poised to invite bids for mobile desal capacity
Saudi Arabia's Saline Water Conversion Corporation (SWCC) is poised to invite bids from mobile desalination providers to augment supplies until its planned large scale projects start producing.
GrahamTek wins contract for SWCC pilot project
GrahamTek of South Africa has won a contract for a desalination pilot project for Saline Water Conversion Corporation (SWCC), Saudi Arabia.
Saudi's Al-Fadhli gets the go-ahead for nine new desalination plants
Saudi Arabia has an ambitious $530 million programme to build nine new desalination plants on the Red Sea coast within 18 months, the minister of environment, water and agriculture Abdulrahman Al-Fadhli has revealed.
Saudi Arabia's WEC seeks developers for two mega projects
Water and Electricity Company (WEC) of Saudi Arabia has requested expressions of interest on two new mega seawater reverse osmosis desalination plant projects.
UK/Saudi initiative targets low-cost carbon neutral desalination using solar dome
NEOM has signed an agreement with UK-based Solar Water Plc to build the first ever "solar dome" desalination plants in NEOM, northwest Saudi Arabia. The pilot project claims it will revolutionise the water desalination process.
Swcc and Hyrec sign MOU to use Hyrec's concentration technology at SWCC plants
Saudi Arabia's Saline Water Conversion Corporation (SWCC) and Hyrec Technologies Ltd. have signed a Memorandum of Understanding to deploy Hyrec's Osmotically Assisted Reverse Osmosis (OARO) technology for Zero Liquid Discharge desalination in the Kingdom of Saudi Arabia.
Saudi's PIF to raise stake in Acwa Power
Saudi Arabia's Public Investment Fund (PIF) is to raise its stake in Acwa Power to 40 per cent up from 25 per cent, reports Reuters.
Marubeni-led group wins Shuqaiq 3 project
A consortium led by Marubeni Corporation is to invest $600 million in Shuqaiq 3 desalination plant project in Saudi Arabia.
Saudi's WEC prequalifies eight firms for supervisory contract
Saudi Arabia's Water and Electricity Company (WEC) has pre-qualified eight companies to provide supervisory consultancy services on its desalination projects.
UN urges desalination industry to improve on brine
The United Nations has called on the desalination industry to clean up its act on brine as the number of desalination plants worldwide continues to climb.
Most-read: our top 20 stories of 2018
The year 2018 was dominated by big project tenders in the Middle East, especially Saudi Arabia. Water. desalination + reuse rounds up the top stories from our industry.
DuPont opens membrane factory in Saudi Arabia
DuPont Water Solutions has opened a new membrane manufacturing facility in Saudi Arabia.
Seven bidders line up for Abu Dhabi mega-project
Abu Dhabi Department of Energy has unveiled the seven consortia bidding for Taweela desalination plant mega-project, with the lowest price coming from ACWA Power at $0.49 per cube.
Saudi Arabia to build solar-powered, adsorption desalination plant
Saudi Arabia is building a solar-powered desalination plant using adsoprtion technology, in one of seven strategic projects that include the nation's first nuclear research reactor.
SWCC asks firms to resubmit bids on nine plants
Saline Water Conversion Corporation of Saudi Arabia has invited firms to resubmit bids on nine desalination plant projects that were brought forward in January 2018, reports MEED.
Bidding shapes up for Shuqaiq 3 desal plant
Six consortia have bid for Shuqaiq 3 desalination plant project in Saudi Arabia, a public-private partnership expected to include a 25-year concession.
ACWA Power shaves $0.01 off next-best price in Rabigh 3 bidding
ACWA Power is offering the most competitive price by $0.01 out of five bidding consortia for Rabigh 3 independent power and water project.
Acciona Agua wins E200 million Al Kohbar desal contract
Acciona Agua has won a Euro 200 million ($232 million) contract to design and build Al Khobar desalination plant on Saudi Arabia's east coast.
SWCC procures three floating desalination units
Saudi Arabia's Saline Water Conversion Corporation has procured three desalination units to provide floating capacity of 150,000 m3/d of drinking water over 20 years.
A grand conference is AMTA/ AWWA's fourth
One thousand attendees turned up at Orlando, Florida for the fourth Membrane Technology Conference (MTC) hosted jointly by the American Water Works Association (AWWA) and American Membrane Technology Association (AMTA) last week.
Texas treatment company spins off frac water firm
A company called Green Hydro LLC has been spun off by Texas-based Advanced Hydro Inc to use desalination to address increasing demand for water use in hydraulic fracturing.
Nine desalination studies bag US$ 1.4 million funding
Nine research projects and pilot studies will share US$1.4 million in funding under a desalination and water purification research programme set up by the US Bureau of Reclamation.
IDA 2015 World Congress draws 1,700 delegates
More than 1,700 delegates from 63 countries attended the International Desalination Association's (IDA's) 2015 World Congress held in San Diego recently according to the association's key metrics published this week. Awards for papers and presentations topped US$ 30,000.
AdVE desalination pilot plant approved for Laredo
A 50,000 gpd (190,000 L/d) advanced vapor compression desalination (AdVE) pilot plant is to be constructed and operated for the City of Laredo, Texas. The City Council has approved a US$ 1.6 million joint proposal by Terrabon LLC and the Texas Engineering Experiment Station (TEES).
Desalitech and Veolia tie up Mexican MoU
Desalitech Inc has signed a memorandum of understanding (MoU) with Veolia Water Solutions & Technologies to bring advanced cost‑effective high‑recovery water solutions to Mexico and additional countries worldwide.
ZLD wastewater pilot makes first water in Beijing
A pilot NanoClear zero-discharge wastewater treatment plant in Beijing has just produced its first water, according to developer Dais Analytic Corporation.
Masterclass webinar to look at combining reuse and desalination using forward osmosis
Award-winning researcher, Gaetan Bandin, will present the next Desalination and Water Reuse Masterclass Webinar on 30 June looking at opportunities and challenges for forward osmosis and pressure assisted osmosis (PAO) to combine water reuse and desalination.
Slimline MBR is first product from LG Electronics
Only two months after announcing it was entering the water membrane business, LG Electronics (LG) unveiled its first wastewater treatment solution, a membrane bioreactor, on 25 November 2010.
EDS posts desalination courses for early 2011
The European Desalination Society has posted a half-year series of courses on its website for 2011 related to water desalination and membrane technology. All the courses will take place in Pegli, close to Genoa, Italy, at the Hotel Mediterranée.
MSF/FBE seawater desalination and fouling hypersaline wastewater treatment
The Multi-Stage Flash/Fluidised Bed Evaporator (MSF/FBE) is not strictly a new technology, but the applications suggested in this article are new. It is claimed to halve the costs of distillate production compared with most advanced conventional MSFs and is suggested as a way to expand existing MSF plants. Another application is the wind-powered MSF/FBE for distillate production at remote underdeveloped locations. This article also introduces a Vapour Compression/Fluidised Bed Evaporator (VC/FBE) for the treatment and concentration of saline and severely fouling industrial and mining (waste)water streams. This article first appeared in the August/September 2010 issue of Desalination & Water Reuse magazine.
4th Membranes & Desalination event set for Gold Coast
The Membranes and Desalination Specialty IV Conference, to be held in Gold Coast on 11-12 February 2011 by the Australian Water Association, has a problem solving focus.
Video Q&A: Ronit Erlitzki, AdEdge Water Technologies
AdEdge Water Technologies' director of business development Ronit Erlitzki, presents a new technology that uses flow reversal to minimise membrane fouling.
Pretreatment course scheduled by EDS for May 2010
The European Desalination Society (EDS) on 15 January 2010 announced a four-day course on Pretreatment, membrane fouling and scaling to be held in Genoa, Italy, on 31 May - 3 June 2010.
Veolia and NanoH2O hook up to test new membranes
Veolia Water Solutions & Technologies and NanoH2O announced a five-year partnership on 10 November 2009 at the International Desalination Association's World Congress in Dubai.
IDA releases more Congress details
More details have been released about the program for the 2009 World Congress of the International Desalination Association (IDA), which will take place during 7-12 November 2009 in Dubai.
Three desalination workshops follow IDA World Congress
Three different aspects of desalination will be covered in workshops announced on 10 September 2009 by the International Desalination Association (IDA), which will follow its upcoming World Congress in Dubai.
Furukawa and Glater enter AMTA Hall of Fame
Two very popular admissions to the American Membrane Technology's Hall of Fame were announced at the association's 2009 conference and exhibition in Austin, Texas, on 15 July 2009.
Toray to set up desalination/reuse R&D lab in Singapore
The establishment of Toray Water Technology Laboratory (TWTL) in Singapore to conduct research and development of water treatment technologies was announced by Toray Industries Inc on 24 June 2009. The Nanyang Environment & Water Research Institute (NEWRI) at Nanyang Technological University (NTU) will be Toray's partner for its research activities in Singapore.
Large EDR river desalination plant opens in Spain
GE Water and Aigües Ter-Llobregat (ATLL) of Spain announced on 19 May 2009 the opening of the 220,000 m³/d electrodialysis reversal (EDR) brackish water desalination plant on the Llobregat river.
Desalination course just misses quake
Earth tremors felt during the European Desalination Society's fouling and scaling course in L'Aquila, Italy, last week, were obviously precursors of the major earthquake that struck the town at 03:30 on 6 April causing over 190 deaths.
Video Q&A: Doug Eisberg, Avista Technologies
Avista Technologies' director of business development Doug Eisberg, explains how new applications of membranes in water reuse systems are bringing fresh challenges.
Pilot tests for dopamine anti-fouling technology
Seed capital totalling US$ 500,000 for the development of a dopamine-based membrane anti-fouling technology has been raised by Advanced Hydro Inc (AIC), based in Austin, Texas, USA, the company announced on 6 January 2009.
First MOT plant produces water in Gibraltar
The first desalination plant to employ Manipulated Osmotic Technology (MOT) has produced its first water in Gibraltar. Modern Water, the UK company that installed the plant, also announced on 15 September that it has an agreement to install another MOT plant in Oman.
Combining Forward Osmosis with Reverse Osmosis
A combination of forward osmosis with reverse osmosis could facilitate the treatment of some high fouling wastewaters. The system uses brine to draw water from the wastewater without high pressure or turbulence. Key element is the membrane's ability to allow rapid passage of water without much internal concentration polarization. The diluted draw solution can then be desalinated by reverse osmosis. The Two-Way Osmosis or TWO system may also be usable in very remote areas, where seawater ponds can be built for evaporative recovery of salt. Catalyx is designing a pilot system (patent pending) to desalinate seawater without external electric power. This article was published in the May/June 2009 issue of Desalination & Water Reuse.
Desalination using forward osmosis with nanofiltration membranes
Forward osmosis (FO) is an emerging membrane technology, often used for desalination. Like reverse osmosis (RO), FO uses a semi-permeable membrane to separate water from dissolved solutes. The semi-permeable membrane acts as a barrier that allows water to pass through while blocking salts. Generally, any dense, non-porous, selectively permeable material can be used as a membrane for FO. Professor Chung invented a novel polybenzimidazole (PBI) nanofiltration (NF) membrane with a narrow pore size and high flux for the FO process. PBI was chosen mainly because of its robust mechanical strength and excellent chemical stability. However, at high ionic strength (normal in FO applications) and normal operational pH values, the charge of the membrane surface is neutral, leading to a decrease in electrostatic repulsion between the membrane surface and electrolytes to be rejected. Consequently, monovalent salts rejection decreases. Ideal NF membranes for FO would be highly negatively charged at most pH values. Additionally, these membranes are hydrophobic and have a propensity to foul during operation. Therefore, this collaboration is performing research to improve the separation performance of the PBI FO membrane by (1) lowering membrane fouling via chemical modification, and (2) increasing its monovalent salt-rejection via membrane surface modifications. Since these properties are given to a porous PBI NF membrane instead of the conventionally used dense RO membranes, this project has the potential to revolutionize the field of desalination using FO. Development of a desalination process technology using the FO route has the potential to achieve up to a 75% decrease in costs and energy consumption in desalination, in comparison with conventional thermal or RO processes. This technology is still undergoing research. Acknowledgments The source of funding was the National Science Foundation, NSF OISE 0832894. This article appeared in D&WR magazine's May/June 2009 issue.
MBR upgrades mean less maintenance and longer life
In recent years, MBR membranes have evolved to the point where they require less maintenance and at the same time have a longer useful life. An added benefit comes from the more advanced designs that consume significantly less energy and lower operating costs. The new Puron module from Koch Membrane Systems Inc (KMS) is a second generation MBR membrane module that employs hollow fibers. Like several other second generation membranes, the high-strength fibers that comprise the Puron modules also overcome the fiber breakage problems typical of first generation systems that use non-braided fibers. Second generation systems position the membrane bioreactor industry for even more rapid growth. They offer several advantages, including improved performance in terms of reduced fouling and lower energy consumption. They are also more robust than first generation systems and are usually designed with compatibility in mind to minimize retrofitting costs. This article appeared in D&WR magazine's August/September 2008 issue.
Antiscalant removes need for acid in wastewater RO
Field trials of a new scale-inhibiting chemical for use with reverse-osmosis membranes in wastewater reuse plants show that, at a low dose rate, it can increase the solubility of calcium phosphate by over one hundred times, obviating the need for using dangerous and costly acid. Current design practices for large effluent reuse projects are focused on a combination of removing phosphate by precipitation prior to the RO plant and acid dosing to reduce pH to 6.0 and hence increase calcium phosphate solubility to prevent fouling. Conventional antiscalants are ineffective at high phosphate and high recovery rates, and the only other option has been to dose large quantities of acid to reduce feed pH to below 6.2. Reducing the pH from 7.5 to 6.0 on a 2,700 m /day plant would require 0.5 to 1 ton of 95% sulphuric acid per day. Handling this quantity of acid is an environmental, health, safety and logistical problem that many plant operators would like to move away from. The results from the field trials show that using a highly active threshold inhibiting antiscalant such as Genesys PHO at a low dose rate of 2 -5 mg/L can increase the solubility of calcium phosphate by over one hundred times. This article appeared in D&WR magazine's August/September 2008 issue.
AMTA unveils annual gongs for membrane experts
The American Membrane Technology Association (AMTA) has conferred its annual roster of awards for membrane specialists, include its Lifetime Service Award, Hall of Fame Awards, and Operator of the Year Award.
AMTA NEWS Novel sub-nanofiltration ceramic membrane production uses DNA
A novel method for creating ceramic reverse osmosis membranes with sub-nanometre pores by using the genetic material, DNA, as a template former, overcomes the poor reproducibility encountered in conventional methods according to the developer of the technology, Cerahelix.
Microbubble membrane cleaning stems fouling
In spring 2014 we published an article on how Genesys developed its microbubble-based membrane cleaning system. In this follow up Genesys presents results from a case study of the technology in a wastewater reverse osmosis plant. This article first appeared in the February 2015 issue of Desalination & Water Reuse magazine.
Kuwait plant to get GE membranes
Kuwait's Sulaibiya wastewater treatment and reclamation plant will be upgraded with GE's water reuse technology.
First guide to harmful algal blooms launches at IDA World Congress 2017
UNESCO Intergovernmental Oceanographic Commission (IOC) and Middle East Desalination Research Centre (MEDRC) introduced the world's first guide to harmful algal blooms (HABs) on Tuesday 17 October 2017, at IDA World Congress.
Membrane market growth to run until 2020
The fruits of growing research and development in forward osmosis for desalination are highlighted in a recent sector report as drivers of growth in the market for membrane separation technologies running to at least 2020.
Q&A: Tim Harper, G20 Water Technologies
Former European Space Agency scientist Tim Harper, now chief executive of G2O Water Technologies, talks graphene-coated membranes
Researchers share industry prize for fouling research
Doctoral students, Ariel Atkinson of the University of North Carolina at Chapel Hill and Erin Partlan of Clemson University, have received the 2014 Fellowship for Membrane Technology award from the American Membrane Technology Association (AMTA) and the National Water Research Institute (NWRI) for research in membrane fouling.
The Long Read: Where's the innovation in brine treatment?
As water scarcity bites and the drive to recycle water grows, the focus on recovering clean water and other resources from brine is sharpening. The challenge is particularly pertinent for industrial operators.
Researchers cast doubt on economics of osmotic power
New research findings have questioned the economics of power production from pressure retarded osmosis (PRO).
Why MFI is edging SDI as a fouling index
PARTICULATE FOULING has plagued reverse osmosis (RO) systems since their first use in desalination and remains a persistent issue today for RO and other pressure-driven systems such as microfiltration (MF), ultrafiltration (UF) and nanofiltration (NF). In the early 1960s, the Du Pont company/Permasep Product successfully launched the hollow-fine-fibre (HFF) permeator onto the desalination market, where it dominated for several decades. A well-known weakness of this permeator was its vulnerability to fouling. Initially, this vulnerability was attributed to suspended and colloidal matter in the feed water, ie, particulate fouling. Therefore, Du Pont developed, the Silt Density Index (SDI), initially named the Fouling Index, as a parameter to characterize the fouling potential of the feedwater for permeators. The fouling mechanism turned out to be more complicated than just fouling of the membrane surface as initially assumed. Gradually it became clear that the fouling was initiated by local clogging of the woven or non-woven fabric between the fibres, which is needed to ensure equal flow distribution of the feed water (see Figure 1). This article first appeared in the issue of Desalination & Water Reuse magazine.
Hydranautics introduces two new spiral wound RO membranes
Hydranautics has brought out two new spiral wound reverse osmosis membranes for demanding industrial and municipal applications.
Tubular membranes replaced at South Africa coal plant
More than 2,500 tubular reverse-osmosis (TRO) membrane modules have been replaced at a South African coal-to-liquids refinery by Veolia‑owned Membratek in a subcontract.
Desalitech recognised for topping water recovery rate records
Desalitech has won the IDA Industry Technology and Innovation Leader in Water Reuse and Conservation Award of Distinction, thanks in part to its work at Padre Dam Advanced Water Reclamation plant in Southern California.
Registration open for WateReuse research conference
Registration is open for the 18th Annual Water Reuse & Desalination Research Conference to be held by the WateReuse Research Foundation in Las Vegas on 19-20 May 2014.
Water Planet to use 3M polymer in membrane manufacture
Water Planet Engineering (WPE), a spinoff company from the University of California, Los Angeles (UCLA), has entered into a joint development agreement with global company 3M to explore commercial production of a new polymer material with widespread industrial application.