Recovery, Israel, Virginia, Mining, Saudi Arabia, Brackish Water, Reverse Osmosis, Water Quality, Malta


Related content

A pilot Desalitech SWRO commercial plant

Desalitech closed-circuit technology set for BWRO project

Israel-based Desalitech Ltd announced on 7 April 2011 that it had been awarded a contract to design and build a reverse osmosis (RO) desalination system for Environmental Protection Technologies (EPT), a global company that leads the industrial wastewater treatment market in Israel.

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.

Australian mining town to up quality from boreholes close to pit with desalination plant

The Australian arm of water technology firm, Valoriza Agua, has won a design and construct contract to deliver a 16.5 Ml/d water treatment plant to replace an existing facility and provide drinking water for the Western Australian mining town, Newman and the mine. The plant will include brackish water reverse osmosis and an ultraviolet treatment system to treat a mix of flows from drinking water boreholes sited too close to mining activities.

Oxnard AWPF currently under construction

Finance agreed for Camarillo regional desalter studies

Two water districts and two - possibly three - cities in southern California have agree to finance studies for a regional brackish-water desalination plant to be located near Camarillo.

Severn-Trent wins Chilean mining desalination contract

US water and wastewater treatment company Severn Trent Services has been awarded a contract to provide a seawater desalination plant that will serve the potable and process water needs of the Minera Esperanza copper and gold mine in Antofagasta, Chile.

Pressure-exchanger court case goes to Hauge

The latest round of the "pressure-exchanger wars" between inventor Leif J Hauge, his company Isobarix Inc and energy-recovery equipment manufacturer Energy Recovery Inc (ERI) has gone in favour of Hauge.

South Africa to focus on desalination and water reuse

Desalination and the reuse of wastewater from municipalities and mining are strongly emphasised in the 2nd National Water Resources Strategy (NWRS2) for South Africa released at the start of July 2013.

Chilean mine SWRO gets environmental approval

An environmental impact study (EIS) for a 26,000 m³/d desalination plant for a mining operation in northern Chile is reported to have been approved by the regional office of the Ministerio del Medio Ambiente (environment ministry).

Desalitech building demo plant with Layne Christensen

The originator of the Closed Circuit Desalination (CCD™) technology, Desalitech Ltd, announced on 30 June 2011 that it will work with mineral and water drilling and treatment company Layne Christensen to design and build an innovative desalination system.

Desalination capacity increasing by 50% in 2013 says IDA

Desalination plants with a total capacity of 6 million m³/d are expected to come on line during 2013, a 50% increase on 2012, according to new data from the International Desalination Association and GWI DesalData.

Escondida desalination is first Doosan job in Latin America

Doosan Heavy Industries & Construction announced its first seawater desalination plant project in the Latin American market on 25 August 2013.

IDE lands big Australian mining RO contract

IDE Technologies has been awarded the design and supply contract for a 140,000 m³/d desalination plant for the Sino Iron Project in Western Australia by CITIC Pacific Mining.

Parsons lands SAWS brackish water desalination job

Parsons Corporation is leading a joint venture to serve as the construction manager at risk for the San Antonio groundwater desalination program in Texas, USA.

EDR plant at Abrera

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.

Veolia supplies RO desalination to Mauritania mine

A 1,500 m³/d reverse-osmosis (RO) brackish-water desalination plant has been supplied to a mine in Mauritania by Veolia Water Solutions & Technologies South Africa, with a heat-exchanger to cool the water.

Juan Miguel Pinto is confident that Latin America’s market for desalination and reuse projects is poised for growth. The question is not if, but when?

Interview: Juan Miguel Pinto, ALADYR president

The new president of ALADYR, the Latin America desalination and water reuse association, sees his organisation as a window onto the region for international companies. His big aim is to step up events during 2018, taking knowledge of desalination and reuse out to the market.

Mining firm strikes funding deal for desalination plant at planned mine

Mining firm, White Mountain Titanium, has agreed a deal with US private equity company, Nexo Capital Partners, to fund, construct and manage a desalination plant to form part of White Mountain's planned Cerro Blanco mining project in Chile.

Adionics launches liquid-to-liquid desalination system

France-based Adionics has launched a smart desalination solution that is able to remove specific salts to address the growing demand coming from oil and gas, food and beverages as well as mining.

“We are looking at organic growth, and mergers, acquisitions, and joint ventures.

Energy Recovery: 'hyper-focused' on water

The former chief financial director of Energy Recovery has now stepped into the top job as chief executive on a permanent basis. He reveals plans to develop new packaged product for the desalination market, and takes a wry line on the industry's lively rumour mill.

The RO hall at the Thames Gateway desalination plant east of London.

Four-stage RO for London desalination plant

The UK's 150,000 m³/d Thames Gateway brackish-water reverse-osmosis (RO) desalination plant, which was opened by Queen Elizabeth's husband, the Duke of Edinburgh, on 2 June 2010, has a four-stage RO process.

Papers invited for 2013 AWWA/AMTA event

With the 2012 AWWA/AMTA Membrane Technology Conference under way this week in Phoenix, Arizona, a call for papers has been issued for next year's event in Texas.

IDA releases program details for Morocco conference

The International Desalination Association released details on 19 January 2012 of the Program Highlights of the Desalination and Sustainability conference which will take place on 1-2 March 2012 in Casablanca, Morocco.

Maltese desalination test-bed shows SalTec energy-recovery advantages

Throughout the desalination industry, plant operators are looking for long-term solutions with lower lifecycle cost because of the link between water costs and energy costs. In order to meet operators' demands and requirements, equipment manufacturers are investing considerable resources in the development of new technologies that will reduce energy costs. The Water Services Corporation in Malta is one example of a forward-looking operator of a seawater reverse-osmosis (SWRO) plant seeking to ensure the production of high-quality drinking water at an affordable price. Established in 1993 to produce and distribute potable water on the islands of Malta and Gozo, WSC has an annual production target of 35 million m to satisfy the needs of its 400,000 residents and in excess of one million tourists. With the drive to produce greater efficiencies and water quality WSC has taken an opportunity to investigate and monitor the potential of a new technology from KSB, the SalTec pressure boosting and energy recovery system. The SalTec DT pressure exchanger in combination with KSB's HGM RO high-pressure pump creates a highly attractive proposition for RO plant designers and operators. The SalTec DT system provides a nominal capacity of 250 m /h, giving it the capability to operate in plants with train sizes ranging between 4,400 m /d and 5,000 m /d of permeate at common recovery rates.

New clarifier solves Virginia UF membrane problems

Funds from the US Environment Protection Agency (EPA) have enabled completion of a new pretreatment system for an ultrafiltration membrane system at the Fairmont Water Filtration Plant in West Virginia.

AMTA and SEDA to hold Chesapeake membrane workshop

The American Membrane Technology Association (AMTA), which promotes membrane processes for desalination and water / wastewater treatment, is to hold a joint technology transfer workshop with the Southeast Desalting Association in Chesapeake, Virginia, in May 2013.

Cost, regulation and water scarcity are driving a shift in mindset toward resource recovery in brine treatment

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.

RO consumes 4% of Malta's electricity, says new group

Reverse-osmosis desalination plants consume almost 4% of Malta's electricity supply, according to a statement from the newly-formed Malta Water Association (MWA) on 22 March 2011. The group, made up of hydrologists, engineers and other water experts, warned that urgent action is needed to protect Malta's water resources, which "are among the scarcest in the world and under severe stress."

Hauge and Isobarix cleared of contempt of court

The US District Court for the Eastern District of Virginia* on 20 March 2014 cleared Leif Hauge and his energy-recovery device company Isobarix of contempt of court in a case brought by Energy Recovery Inc (ERI).

Sadyt chooses ERI pressure-exchangers for Ashdod

Israel's giant Ashdod desalination plant is to use PX-Q300 energy-recovery pressure-exchangers supplied by Energy Recovery Inc (ERI) of the USA.

GE expands HERO licensing agreement

GE Power & Water announced on 1 February 2011 that it has completed a new expanded licensing agreement to allow it to continue offering High Efficiency Reverse Osmosis (HERO™) systems to help more of its industrial customers increase their water usage efficiency and reuse capacity.

Biwater Florida RO project has manipulated ER unit

Acceptance testing has been successfully completed for a I.5 MGD (5,680 m³/d) reverse osmosis (RO) system being built by Biwater at the Springtree Water Treatment Plant in Sunrise, Florida, USA.

Veolia in mineral recovery partnership at inland desalination plant

Texas-based company, Enviro Water Minerals (EWM), is to deploy its novel mineral recovery technology in a partnership with water and waste giant, Veolia, to produce potable water from brackish water desalination effluent.

Impression of the Hadera expansion.

PX energy-recovery for Hadera desalination expansion

Energy Recovery Inc's PX Pressure Exchanger™ (PX™) devices have been selected by IDE Technologies for the expansion of its seawater reverse-osmosis desalination plant in Hadera, Israel.

PX energy-recovery units selected for Palmachim expansion

Energy Recovery Inc announced on 9 September 2009 that its PX Pressure Exchanger™ (PX™) devices have been selected for use in the expansion of the 115,000 m³/d Palmachim desalination plant, one of the largest seawater reverse osmosis plants in Israel.

Veolia buys rights to ZDD desalination technology

Veolia Water Solutions & Technologies has acquired worldwide rights to commercialize a new patented zero discharge desalination (ZDD) technology developed at the University of South Carolina by ZDD Inc.

Aerial view of Sorek desalination plant

World's largest SWRO desalination plant operational

The world's largest seawater reverse-osmosis plant, the 624,000 m³/d Sorek plant in Israel, is now fully operational.

South Australian town to get new desalination plant

South Australia's water minister, Ian Hunter, announced on 1 May 2013 that a brackish-water desalination plant to deliver improved water quality to the town of Hawker, in the Flinders Ranges 100km north of Port Augusta, had been approved for construction.

Flowserve wins pumps and ERDs for Larnaca desalination

DWEER™ energy-recovery units and Flowserve DMX high-pressure pumps are to be supplied for the 60,000 m³/d Larnaca seawater reverse-osmosis (SWRO) desalination plant currently being rebuilt in Cyprus.

BEL, Dow and Hydranautics to supply Sorek

BEL Composite Industries Ltd has been awarded a multimillion dollar contract to supply nearly 2,000 units of 16-in side-port pressure vessels for the Sorek seawater desalination plant in Israel.

Israel aids Pacific island with mobile desalinator

Israel's ministry of foreign affairs is supplying a truck-mounted desalination facility to the Marshall islands in the Pacific ocean to help tackle the islands' severe water shortage.

SEDA to hold events in Chesapeake and Pompano Beach

The Southeast Desalting Association has announced a Membrane Cleaning Workshop to be held in Chesapeake, Virginia, in late October 2013.

H2O Innovation takes Californian reuse contract

A contract to expand the Leo J Vander Lans Advanced Water Treatment Facility in Long Beach, California, has been awarded to Canadian company H2O Innovation Inc.

Cadagua orders ERI PX-Q300s for Morocco project

Spanish desalination contractor Cadagua has ordered PX‑Q300 pressure‑exchangers from Energy Recovery Inc (ERI) for the first phase of the Jorf Lasfar seawater desalination plant in Morocco.

Ministry reported to have rejected Chile desalination EIS

The Ministerio del Medio Ambiente (Environment Ministry) in Chile has apparently rejected the environmental impact study (EIS) produced by Suez subsidiary Agbar Chile for an 86,000 m³/d desalination plant in Northern Region III.

Acciona to build RO plant for Chile mines

Spain's Acciona Agua has been selected by Grupo CAP to design, build, bring into service and operate for 20 years a seawater desalination plant to service mining operations in the Copiapó Valley in Chile's Atacama Region III.

SEDA offers first module of membrane operator certificate

The Southeast Desalting Association (SEDA) is offering Module I of the Membrane Operators Certification (MOC) Short School in April 2013 in Palm Coast, Florida.

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.

RWL wins contract to build desalination plant in Argentina

RWL Water has won a contact to build what it claims will be Argentina's largest seawater reverse osmosis (SWRO) desalination plant.

The WateReuse awards recognise extraordinary leadership and contribution

WaterReuse awards recognise people and projects

The WateReuse Association has unveiled its annual award winners of people and projects that have made significant contributions to water reuse.

The demonstration project will draw on lessons from the Mega-ton Water System, whose aim was to create a paradigm shift in energy consumption for reverse osmosis desalination

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.

Study starts on salinity reclamation of W Australian river

Mitigation measures such as desalination and diversion could be proposed for the Collie river basin in Western Australia as a result of an independent review of possible strategies for salinity recovery, which has just been started by consultants KPMG and Worley Parsons.

Aqualia wins SWRO contract in Chile

Spanish company Aqualia has been awarded a contract worth about € 17 million to design and supply seawater reverse-osmosis equipment for a desalination plant in Chile, its first work in that country.

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.

DWEER units chosen for Sorek desalination

The consortium building the Sorek desalination plant in Israel has ordered Calder DWEER units with an approximate value of US$ 10 million from Flowserve Corporation of the USA.

NWC report boosts Australian brackish desalination

Brackish groundwater desalination can be considered a viable community water supply option in some areas, says a report just announced by Australia's National Water Commission (NWC).

Drilling starts for SAWS brackish-water desalination

San Antonio Water System (SAWS) in Texas, USA, launched work on its 25 MGD (95,000 m³/d) brackish-water desalination system on 27 March 2012.

LG Chem bags five orders worth US$ 8 million

LG Chem has acquired new orders for water purification filters totalling US$ 8 million under exclusive deals with five desalination projects. The projects are at sites in Israel, Spain, Malta, Egypt and Mexico, the company said.

Jorge T Aguinaldo

New quartet joins RWL's Aeromix and Nirosoft

RWL Water has recently added four new staff to its group companies Aeromix and Nirosoft.

The new research paper synthesises data to create a world map of brine production

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.

Veolia Peru wins operation deal for mine desalination

Veolia Peru, has won a three-year operation and maintenance contract for a 4.1 Ml/d reverse osmosis desalination plant at the Cerro Lindo multi metal mine owned by Lima-quoted exploration and mining firm, Milpo.

Gold miner opts for desalination to supply planned Mexican mine

The gold mining arm of energy firm, Chesapeake, has opted to use desalinated seawater to supply water for its proposed Metates gold and silver mining project in Durango state, Mexico. It has tendered for proposals to build and operate a 55Ml/d desalination facility to supply the mine with fresh water.

WE&RF's Jeff Mosher is charged with allocating a research budget of £8 million

"We are figuring out how to manage a portfolio of water resources" Jeff Mosher, WE&RF

The new head of research at the Water Environment & Reuse Foundation, US, outlines a vision for research to support integrated water resource management.

Aqualogy starts up copper mine desalination plant in Chile

Aqualogy has inaugurated the operation and maintenance of a US$ 100 million reverse osmosis desalination plant built for the Mantoverde copper mine.

Bechtel contract for Escondida desalination project

BHP Billiton has contracted Bechtel to provide engineering, project management and construction services for the water supply to the Escondida copper mine in the Atacama Desert of northern Chile.

Tunisia and Malta to share desalination expertise

Tunisia has signed an agreement with the Mediterranean island of Malta involving sharing of expertise on desalination plants.

Ceramic nanofiltration company gets big investor

ItN Nanovation AG, a start-up company in Saarbrucken, Germany, making nanofiltration ceramic products for the water industry, announced on 9 December 2010 a framework investment agreement with the US investment fund YA Global Master SPV Ltd, part of the Yorkville Group.

Community-level solar RO plant (250 L/h capacity)

India's BARC develops small solar RO and UF units

Domestic and community-level reverse-osmosis (RO) desalination units have been developed for producing safe drinking water by Saly T Panicker at the Desalination Division of India's Bhabha Atomic Research Centre.

The adsorption pilot at a solar manufacturing facility near Riyadh focused on recovering reverse osmosis brine. Recovery rates are critical at the site, which is 100 miles inland

Adsorption pilot phase two will focus on ZLD

MEDAD Technologies, a specialist in adsorption, has worked to commercialise a multi-effect distillation adsorption desalination (MED-AD) system since spinning off from the National University of Singapore (NUS) in 2012.

ERD comparison tool developed by WateReuse project

A tool to allow engineers to evaluate commercially available energy-recovery devices (ERDs) for reverse-osmosis (RO) systems has been developed under a research project funded by the WateReuse Research Foundation.

The new SWRO mega plant at Escondida copper mine is fed by seawater from the Port of Antofagasta, 170 kilometeres away

Escondida mega plant poised to produce water in March

Mining giant BHP Billiton has reported the "mechanical completion" of Escondida Water Supply project, Chile, with the first water expected in March 2017.

Agency approves W Australian desalination plant

Western Australia's Environmental Protection Agency (EPA) on 13 February 2012 announced conditional approval for Grange Resources Ltd's proposal to construct and operate the Cape Riche Desalination Plant.

ERI Q Series chosen for Acciona project in Chile

Spanish contractor Acciona Agua has chosen Energy Recovery Inc (ERI) energy-recovery equipment for its contract for the Minera CAP expansion desalination project in the Copiapó Valley in Chile's Atacama Region III, ERI announced on 16 July 2013.

Namibian mines get mixed messages

Namibian uranium mines have received mixed news on the prospects for an end to their struggle to secure cheaper and secure water supplies through new desalination facilities.

Tri-national desalination course held in Tel Aviv

A five-day desalination course jointly organized by the Jordan, Israel and Palestinian water authorities, in partnership with the Middle East Desalination Research Center, was held in Tel Aviv, Israel, on 30 October - 4 November 2011.

Namibia moves to buy Areva desalination plant

Namibia has moved on its declared intention to offer to buy Areva's 20 million m³/d water desalination plant in the country.

Namibian uranium mine ponders desalination project

Namibian uranium mining firm Rössing Uranium is investigating the economic viability of designing, constructing and operating a new desalination plant to supply its operation in the economically important Erongo Region where water is scarce.

Mining water treatment market to grow 85% by 2019

The global water treatment market for hard-rock mining - iron, copper, gold, nickel - is set to grow 85% to US$ 17 billion by 2019 according to market analyst, Bluefield Research.

Chilean politicians launch mining desalination bill

A cross-party group of eight deputies in the lower house of the Chilean national congress has submitted a bill to require mining companies using more than 150 L/s of water for extraction purposes to install seawater desalination equipment.

West Basin desalination demo could begin next year

Construction could begin in 2010 on the Ocean-Water Desalination Demonstration Project at Redondo Beach near Los Angeles, California, the West Basin Municipal Water District announced on 30 July 2009.

Billiton clears finance for 216,000 m³/d Chile desalination

An investment of US$ 1,972 million was approved by mining giant BHP Billiton on 25 July 2013 for its 216,000 m³/d seawater desalination plant in Escondida, Chile.

Metito lands Bechtel SWRO desalination in Australia

Dubai-based Metito has landed two new seawater reverse-osmosis (SWRO) desalination plants in Australia and is currently nearing completion of one in Qatar.

Municipal desalination plant planned for Chile's Copiapó

Construction of a municipal desalination plant will form part of urgent measures to address water shortages in the region around the Chilean city of Copiapó.

BASF water business combined with other sectors

German chemical giant BASF has combined its water business with its oilfield and mining businesses as from 1 April 2013 to increase efficiency and support growth.

Giant Canadian potash project buys Veolia evaporator

Evaporation and crystallization equipment from Veolia Water Solutions & Technologies has been bought by K+S Potash of Canada to constitute the core process for a potash project in Saskatchewan, Canada.

'Project bankability is one of the big challenges,' Miguel Angel Sanz, IDA World Congress 2017 technical program chair

Highlights to watch at IDA World Congress 2017

Technical program chair Miguel Angel Sanz introduces his highlights from the line up at IDA World Congress 2017

Opportunities await at IDA World Congress 2017 in Brazil

Latin America, and particularly Brazil, is a big user of desalination and water reuse technology, and there is huge potential for the growth of these technologies in the region, writes Emilio Gabbrielli, president of the International Desalination Association (IDA).

License sought for seawater desalination plant in Chile

White Mountain Titanium Corporation announced on 26 April 2012 that it has applied for an access license to draw seawater for a planned desalination plant in Chile.

Boiler-feed treatment extension for Aquatech in India

Aquatech has been awarded a third contract extension to provide operating services for a boiler feed water treatment plant at Reliance Industries Limited's PTA (purified terephthalic acid) manufacturing unit in Hazira, Gujarat, India.

Olympic Dam desalination plan approved with conditions

BHP Billiton's proposed 200,000-280,000 m³/d desalination plant in southern Australia's Upper Spencer Gulf will be covered by the 100-plus conditions imposed by national and state government approval of the Olympic Dam uranium mining project announced on 10 October 2011.

Chile's copper mines will turn to desalination for half their water

Desalination will provide half the water demand of Chile's copper mining industry by 2026, according to findings in a report by the Chilean state copper commission, Cochilco.

Olympic Dam supplementary EIS satisfies opposition leader

South Australia's opposition leader, Isobel Redmond, was quoted on 20 June 2011 in the Australian media as being "satisfied" that the Olympic Dam desalination plant will not cause any damage to the local environment, including the area's giant cuttlefish population.

Oil sands UF water treatment won by H2O Innovation

A Can$ 9.4 million (US$ 9.6 million) contract for a membrane-based water treatment package has been awarded to H2O Innovation Inc by Fort Hills Energy LP for the Fort Hills Oil Sands Project in Alberta, Canada.

Olympic Dam desalination EIS released by BHP Billiton

The desalination plant in South Australia to feed BHP Billiton's Olympic Dam mining development moved a step closer when the company released the final supplementary environmental impact statement (SEIS) for the project on 13 May 2011.

Aquarion in tie with mining cleantech player

Ottawa-based cleantech company, BluMetric Environmental, has teamed up with Swiss water technology firm, Aquarion, in a technology, business, and project development agreement with an industrial wastewater focus.

Water rights row could delay Western Australia desalination plant

A row over water rights in the north-west of Australia could lead to delay in the construction of the West Pilbara Seawater Desalination Plant, despite assurances in February 2011 from Western Australia's (WA) state government that the project was on track.

CaribDA to sponsor Chile desalination seminar

The Caribbean Desalination Association (CaribDA) announced on 14 October 2010 that it would be a sponsor of a seminar on Desalination, Innovations & Sustainable Development to be held in Antofagasta, Chile, during 29 November - 1 December 2010.

Peruvian mine desalination 'viable' says Southern Copper

The construction of a desalination plant for Southern Copper's US$ 1 billion Tia Maria copper mine, in the Islay province of Arequipa in Peru, is "a viable option", according to the company's executive president Oscar Gonzales, quoted by Reuters on 24 May 2010.

Australia funds water study for coal-seam gas industry

The Australian government is spending up to Aus$ 3.88 million (US$ 3.61 million) on a water feasibility study for the Queensland coal-seam gas industry.

Mining slump threatens Nambia's desalination

Investments in desalination and electricity generation in Namibia could be in jeopardy following a dramatic slowdown in mining output in 2008, according to a new report published on 5 May 2009 by the International Monetary Fund.

Olympic Dam desalination threatens cuttlefish, say researchers

Brine discharge from the proposed Olympic Dam seawater desalination plant in South Australia poses a potential threat to the unique spawning aggregation of the giant Australian cuttlefish, in the upper Spencer Gulf, South Australia, according to two researchers.


Suggested keywords