Membrane, Malta, Ozone, Recycling, Malta, Water Treatment, Ceramic,waste Water Treatment, Tender, Reverse Osmosis, Malta
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.
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."
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.
B&V find ceramic membranes help water recycling
Ceramic membranes used in conjunction with ozone produce significant benefits for water recycling. Jonathan Clement of Black & Veatch, revealed this research result to the Australian Water Association's (AWA) third specialty conference on membranes and desalination held in Sydney, Australia, on 11-13 February 2009.
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.
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.
Buenos Aires membrane papers deadline 15 June
A deadline of 15 June 2012 has been set for papers for the International Water Association (IWA) 3rd Regional Conference on Membrane Technology.
Membrane pioneer draws new investment
Water treatment membrane and solutions developer, Water Planet, has received a new Series B round of investment for its development and commercialization of its industrial wastewater treatment technologies.
US ceramic membrane company expands to Singapore
Ceramic filter-maker LiqTech International Inc of Nevada, USA, announced on 17 January 2012 the opening of an expansion office in Singapore.
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.
IX + ceramic membrane water treatment plant unveiled
A water treatment plant in the Netherlands combining ion-exchange (IX) with ceramic membranes was presented to the water industry for the first time on 12 May 2014 by PWN Technologies of Velserbroek.
IPO in summer for China's H2O Solutions
Shanghai-based H2O Solutions announced on 11 May 2012 that the company, which specializes in nano-membrane purification and multi-charged plate desalination technologies, was taking its stock public in the summer of 2012.
Malta tenders Euro 10 million desalination project
The Water Services Corporation of Malta has issued a tender for a reverse osmosis plant at Hondoq Bay on the Island of Gozo.
Aquarion acquires Germany's MFT
Swiss oil and gas industry water systems company, Aquarion Group, has acquired Membran- Filtrations-Technik (MFT) of Germany for an undisclosed sum.
Fernandez to boost ACWA's PPP push in MENA
Leading Spanish economist Luis Fernandez has joined environmental solutions provider ACWA Emirates as chief officer concessions for the Middle East/North Africa (MENA) region to provide in-depth support for the company's drive into the public-private partnership (PPP) sector.
H2O Innovation lands three water/wastewater contracts
H2O Innovation Inc announced on 14 January 2014 recent contracts totalling Can$ 6.5 million (UA$ 5.93 million) in Western Canada's energy sector.
Dutch to build ceramic membrane demo plant in Singapore
PWN Technologies (PWNT) of the Netherlands is to build Singapore's first ceramic membrane demonstration plant at Choa Chu Kang Waterworks.
Ceramic membranes replace polymer in Saudi projects
German ceramic membrane-maker ItN Nanovation AG has received two orders for its flat membrane filters for groundwater projects in Saudi Arabia, replacing previously used polymer membranes.
Seprotech to acquire Canadian consulting group
Canadian membrane water treatment and reuse provider Seprotech Systems Incorporated has reached agreement to acquire 100% of WESA Group Inc, a professional services company with eight North American offices and one in El Salvador.
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.
H2O Innovation wins North American contracts worth US$ 3.6 million
H2O Innovation has bagged four new contracts worth a total of US$ 3.6 million with two each in the US and Canada. These new deals, the company reported, will maintain its sales backlog for water treatment projects at US$ 38.6 million excluding its Professional Water Technologies, Piedmont and H2O Innovation Maple businesses.
SEDA Spring Symposium brochure available for download
The Southeast Desalting Association (SEDA) has a brochure available for its 2013 Spring Symposium to be held at Delray Beach, Florida.
Tender later this year for Changi expansion
A tender will be called in the second half of 2011 for construction and installation of an expansion to Singapore's Changi Water Reclamation Plant using membrane technology.
United Envirotech to acquire Singapore membrane-maker
Singapore's United Envirotech Ltd (UEL) is to acquire its own membrane manufacturing capability by spending S$ 293.4 million (US$ 231 million) on a 100% stake in Memstar Pte Ltd, a wholly owned subsidiary of Memstar Technology Ltd, also of Singapore, plus certain assets.
Parsons selected for California water-reuse expansion
California's West Basin Water District has awarded its largest ever water-reuse contract to Pasadena-based Parsons Corporation on a design-build basis.
Ceramic MBR demonstration project agreed in Singapore
A ceramic membrane bioreactor (MBR) demonstration plant is to be built at Singapore's Jurong Water Reclamation Plant following the signing of an agreement between the country's water agency, PUB, and Meiden Singapore (MSL), a subsidiary of Meidensha of Japan.
ACWA appoints nanotechnology membrane specialist
UK water and wastewater specialist ACWA Services announced on 6 June 2012 that it has appointed a membrane nanotechnology specialist, Dr Oscar Hernandez-Ramirez as a chemical process engineer.
Ceramic MBR + UASB water reuse plant opens in Singapore
Singapore's first ceramic membrane bioreactor (MBR) plant coupled with an upflow anaerobic sludge blanket (UASB) was opened on 7 March 2014 to treat and recycle industrial used water.
IWA extends deadline for Toronto membrane papers
The International Water Association (IWA) has extended the deadline for submission of papers for the 7th IWA Specialised Membrane Technology Conference & Exhibition for Water & Wastewater Treatment & Reuse.
SEDA Spring Symposium registration opened
The Southeast Desalination Association (SEDA) has opened registration for its Spring Symposium to be held in Florida in June 2014.
SWMOA announces dates for 2013-14
The Southwest Membrane Operator Association (SWMOA) has announced additional workshop dates for desalination and water / wastewater treatment membrane operators for 2013 and the date and venue for its 2014 annual symposium.
Xylem wins US$7.3 million Bahrain wastewater upgrade deal
Switzerland-based water technology company Xylem has signed a US$7.3 million contract with Bahrain's Ministry of Works to upgrade a wastewater treatment facility in the Bahrain capital Manama.
IDA to return to Dubai for World Congress 2019
The International Desalination Association (IDA) is to return to Dubai, United Arab Emirates, for its World Congress in 2019, building on the earlier success of the IDA World Congress held in the emirate in 2009.
United Envirotech buys Xinmin wastewater concession
Membrane treatment specialist United Envirotech Ltd (UEL) announced on 3 October 2011 that the group has exercised a call option to acquire the entire equity interest of Tongji Environmental (China) Pte Ltd, the holding company for Aton Environmental (Shenyang) Co Ltd, for RMB 34.03 million (US$ 5.34 million).
EDS/Wetsus issues membrane conference call for papers
A deadline of 30 June 2012 has been set for abstracts for the eighth in the series of conferences on Membranes in Drinking & Industrial Water Production, which will take place at Leeuwarden in the Netherlands on 10‑12 September 2012.
RWL group to acquire Argentinian membrane specialists
RWL Water Group is about to snap up its fourth acquisition after reaching agreement in principle to acquire a majority holding in Argentinian membrane-technology expert Unitek SA.
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.
Malta to redevelop defunct desalination facility on Gozo island
A defunct desalination facility on Malta's Gozo island is to be redeveloped and brought back into use.
Vial appointed business development manager by inge
Denis Vial has been appointed business development manager by German ultrafiltration (UF) membrane manufacturer inge GmbH, effective 1 March 2014.
Tender for Chennai RO water-reuse plant feasibility
Bids are due by 22 February 2012 for a prefeasibility study for a 45,000 m³/d membrane-based tertiary wastewater treatment plant in Chennai, India.
Chinese industrial wastewater job won by United Envirotech
Singapore-based United Envirotech Ltd, a membrane-based water and wastewater treatment company, announced on 8 February 2011 that it had signed a transfer-operate-transfer agreement with the management committee of the Nanpu Economic Development Zone in China to provide a 80,000 m³/d wastewater treatment plant and a 40,000 m³/d wastewater recycling plant.
Mott MacDonald absorbs Australasian water specialist
The Mott MacDonald consultancy group has taken in AWT, a specialist water technology and consulting company based in New Zealand and Australia.
Evoqua to be new title for Siemens Water Technologies
Evoqua Water Technologies LLC is to be the new name of Siemens Water Technologies LLC following its acquisition by AEA Investors LP.
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.
World's largest membrane leachate-treatment plant handed over
Norit X-Flow and ISTAÇ (Istanbul Metropolitan Municipality Environmental Protection & Waste Materials Valuation Industry) celebrated the handover on 17 August 2010 of a notable wastewater treatment project: the treatment of leachate from the Istanbul landfill in Odayeri and Kömürcüoda.
Pflugerville location for SCMA membrane workshop
An introduction to the use of membrane technology in water and wastewater treatment is being offered in a Texas workshop being held by the South Central Membrane Association (SCMA) on 9 February 2012.
Kenya's a contender for IDA 2021 World Congress
The International Desalination Association (IDA) has shortlisted Mombasa, Kenya, among four finalists to host its 2021 World Congress, reports The Star.
Rochem and APTwater announce merger
A merger was announced on 9 November 2011 between APTwater Inc of California, USA, and Rochem AG of Switzerland.
Chinese delegation visits Oman's Al Ansab MBR plant
A Chinese delegation led by the deputy minister of water resources, Lee Joieeing, visited Oman's Al Ansab submerged membrane bioreactor wastewater treatment plant in Muscat on 24 October 2011 (featured in D&WR, November/December 2011).
German/Saudi JV to make ceramic membranes for RO pretreatment
German nanotechnology investment company Nanostart announced on 20 October 2011 that one of its holdings, ItN Nanovation AG, had finalised a joint venture (JV) agreement with Saudi Arabian company Jaffali to produce ceramic flat membranes (CFMs) primarily for pretreatment for reverse-osmosis.
Proposals sought for membrane-integrity test method
The WateReuse Research Foundation has issued a Request for Proposals to create a method for testing the integrity of high-pressure membranes used for nanofiltration (NF) and reverse osmosis (RO) in water treatment and desalination.
Koch MBR system chosen by Chinese city
A membrane bioreactor (MBR) using membranes supplied by Koch Membrane Systems (KMS) has been chosen for a wastewater treatment plant operated by Zhangjiagang JinGang Sewage Treatment, a state-owned entity which looks after all municipal plants for the Chinese city of Zhangjiagang.
Mann+Hummel buys into membrane-maker Microdyn-Nadir
Industrial filtration group Mann+Hummel announced on 8 May 2014 that it had taken a 50% stake of the German‑based company Microdyn‑Nadir.
MBR plant part of new Muscat wastewater reuse program
Work has started in Muscat, Oman, on the Darsait Wastewater Treatment plant, part of the first phase of the Muttrah Water Reuse Project.
H2O Innovation lands San Jose WTP ultrafiltration contract
A 30 MGD (113,562 m³/d) hollow-fiber ultrafiltration (UF) membrane water treatment system in California is one of three new contracts totaling Can$ 8.8 million (US$ 8.1 million) announced on 21 May 2014 by H2O Innovation.
Singapore desalination plant upgrade will use ceramic membranes
An upgrade planned for later this year at Singapore's Choa Chu Kang Waterworks will use ceramic membranes in a first for the country.
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.
Chinese membrane wastewater firm gets big investment
Global investor KKR has entered into an agreement with United Envirotech Limited (UEL), a water treatment and recycling company in China, for a US$ 40 million common equity investment. KKR subscribed US$ 113.8 million convertible bonds issued by UEL in October 2011 to support the company's business expansion.
Wastewater leads membrane chemicals charge
Growth in the global membrane chemical market to 2020, will be led by the wastewater sector according to market analyst Future Market Insights (FMI). And desalination was expected to witness the highest compound annual growth rate (CAGR) of 11.4% in the global membrane chemicals market between 2014 and 2020.
Brochure available for AMTA workshop in Michigan
The American Membrane Technology Association (AMTA) has released a brochure updating information for its two-day technology transfer workshop in Michigan in May 2014.
Virtual tour online for Bundamba AWT
The multi award-winning Bundamba Advanced Wastewater Treatment Plant in Queensland, Australia, which is already featured in a video available from Koch Membrane Systems, now has its own online virtual tour.
Partnership launches ceramic trial
Netherlands-based PWN Technologies, in partnership with Indian water treatment firm VA
Tech Wabag and Japanese membrane maker, Metawater, has launched a trial to
demonstrate the effectiveness of ceramic membranes as pre-treatment for seawater
ACWA wins two membrane-based projects in Saudi
Two separate contracts for membrane-based water and wastewater projects in Saudi Arabia have been awarded to ACWA Emirates LLC of Dubai.
Water Planet wins produced water contracts
￼Water treatment technology firm, Water Planet, has won a contact to provide industrial wastewater treatment and reuse systems for two recycling centres in California, USA that could recycle oil and gas industry produced water at nearly 20 Ml/d.
Singapore trial proves ceramic-ozone synergy
Since September 2011, PUB, Singapore's national water agency, has been testing a new ceramic membrane treatment technology as a filter for removal of suspended matter and biological pathogens. After 18 months of testing, PUB is now exploring whether ceramic membrane filtration can be included as an option in the design to upgrade Choa Chu Kang Waterworks . This article first appeared in the May/June 2013 issue of Desalination & Water Reuse magazine.
Clairet promoted by H2O Innovation
Guillaume Clairet has been promoted by membrane water-treatment company H2O Innovation Inc to the newly created position of vice president, strategic business development.
Innovation conference part of new Amsterdam water week
Amsterdam's biennial Aquatech exhibition, the leading water exhibition in Europe, has been subsumed into an International Water Week like those in Stockholm and Singapore.
Ozone improves ceramic membrane use for wastewater reclamation
Ceramic membranes have been used in the industrial production of beer, wine and cheese. One of the reasons for this use is the narrow pore size distribution, where careful separation of different size compounds can be achieved. Outside of Japan, the use of ceramic membranes has been almost non-existent for municipal drinking-water systems. The slow adoption of this technology is largely the result of a perception by many that the costs are significantly higher. While the capital costs may be higher, the whole life cycle costs may not be, due to extended membrane life and more reliable operation. Most water reuse today takes the form of indirect potable reuse. These schemes frequently consist of several steps including physical and chemical disinfection and advanced oxidation. They have the disadvantage of high cost and often poor membrane fluxes due to the nature of the wastewater being treated. The study outlined in this article is preliminary, but shows that ozone in conjunction with ceramic membranes for water-reuse applications has many advantages when disinfection and advanced oxidation is required. As opposed to polymeric membrane systems that cannot tolerate ozone, ceramic membranes in conjunction with ozone can achieve multiple key objectives in one step. This article appeared in the May/June issue of D&WR magazine.
Reverse osmosis to drive US membrane demand to $6.2 billion in 2018
Water and wastewater industry demand for membranes will drive a 7.9%-a-year increase in US demand to reach US$ 6.2 billion by 2018 with reverse osmosis membranes surging 8.6% a year according to report by market research firm, The Freedonia Group.
Aquatech prepares membrane-thermal ZLD for Columbia gold mine
The new hybrid membrane-thermal system is to be installed in April and commissioning is expected to be completed by Q4 2019.
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.
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.
RO, IX and ceramic membranes in Veolia oilfield reuse contract
A 45,000 bpd (7,154 m³/d) produced-water reclamation facility is to be installed at the Arroya Grande oilfield in California by Veolia Water through a design-build-operate contract.
Urban surge drives 57% growth in Indian municipal water treatment market by 2018
Urban population growth in India will create huge demand for municipal water and wastewater treatment systems including desalination adding 57% to revenues over five years according to a recent report by market analyst Frost an Sullivan (F&S).
New AMTA/AWWA convention set for Las Vegas in 2014
The American Membrane Technology Association (AMTA) has announced that it has reached an interim agreement with the American Water Works Association (AWWA) to renew their combined desalination and water treatment membrane event for 2014 in Las Vegas, Nevada.
Swiss water treatment to use PAC/UF combination
Wabag Water Technology has announced two water-treatment contracts in Switzerland based on ultrafiltration (UF) and worth around € 6 million which were won by the company at the end of 2012.
GE allies with cleaning and sanitation company
Following a successful pilot program, GE and Diversey, a business unit of Sealed Air Corp, announced an alliance on 11 October 2011 to deliver water and energy-management services to Diversey's cleaning and sanitation customers around the world.
Abigroup to build Kooragang wastewater reuse plant
Construction of the Kooragang Industrial Water Scheme (KIWS) in New South Wales, Australia, is to be carried out by Abigroup under an Aus$ 40 million (US$ 40 million) contract.
AMTA lists tech transfer and AWWA events
The American Membrane Technology Association (AMTA) has fixed dates for technology-transfer workshops this year including a joint event with the South West Membrane Operators Association (SWMOA),
Italy opens its second largest municipal MBR plant
Italy's second largest membrane bioreactor (MBR) entered service on 17 July 2012 following the inauguration of the upgraded wastewater treatment plant in Borghetto Santo Spirito, a town on the Ligurian coast southwest of Genoa.
Seprotech appoints new CEO and president
Ottawa-based Seprotech Systems Inc, developer of CrystalBlue membrane-based water recycling systems, announced a new chairman and CEO on 27 January 2011,
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.
Big energy-savings as giant MBR opens near Seattle
What is claimed to be the world's largest membrane bioreactor (MBR) installation was opened on 24 September 2011 at the Brightwater Wastewater Treatment Plant near Seattle in the US Pacific Northwest.
New Zealand district to install Zeeweed MBR system
Rotorua District Council, New Zealand, is to install advanced bacteria-removing membrane bioreactor (MBR) technology for the upgrade to its wastewater treatment plant using GE's Zeeweed 500d ultrafiltration technology.
MBR plant at heart of United Environtech contract in China
A 50,000 m³/d membrane-based wastewater treatment plant is to be built in Jiangsu Province, China, by United Envirotech of Singapore under a contract worth RMB 220 million (US$ 34.5 million).
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.
AWWA training manual adds membranes and recycling
New information on water treatment residuals and expanded coverage of membrane treatment and recycling feature in the updated fourth edition of the Principles and Practices of Water Supply Operations (WSO)training series published on 17 August 2010 by the American Water Works Association.
Russia sets up water treatment membrane development project
The Russian Corporation of Nanotechnologies (Rusnano) is to finance a project for producing nanostructured membranes and separation modules for water treatment in various industries.
PWT acquired by H2O Innovation
Canadian water-treatment systems manufacturer H2O Innovation Inc announced on 28 May 2009 the acquisition of substantially all of the assets of Professional Water Technologies (PWT) in an arms' length transaction involving H2O subsidiary Membrane Systems Inc.
AMTA visiting Des Moines for tech transfer workshop
The American Membrane Technology Association is to hold a Technology Transfer Workshop in Des Moines, Iowa.
Florida town gets 30,000 m³/d KMS RO system
An 8 MGD (30,000 m³/d) reverse-osmosis (RO) water treatment plant is to be provided for the Florida town of Davie by Koch Membrane Systems (KMS).
Doosan Hydro wins Al Jubail membrane treatment contract
Florida-based Doosan Hydro Technology has been awarded a US$ 10 million contract by Daelim Industrial Co Ltd for the industrial wastewater treatment and reuse package on the Saudi Elastomers Project (SEP) located in Al-Jubail, Saudi Arabia.
Agnihotri elected to board of ThermoEnergy Corp
Dr Dileep Agnihotri, the CEO and president of Advanced Hydro Inc, a company set up to commercialise a novel antifouling membrane coating technology at the University of Texas - Austin, has joined the board of ThermoEnergy Corp, a Massachusetts-based company engaged in development and sales of municipal and industrial wastewater-recovery and clean power-generation technologies.
Membrane technology added to Polish power plant
A third demineralization line using membrane and ion-exchange technology is to be added to the extension of the water treatment plant for the Patnów II power station in Poland.
Mann+Hummel acquire Brazilian RO/UF specialist
Brazilian membrane water treatment specialist Fluid Brasil has been taken over by Mann+Hummel, the German company announced on 9 January 2012.
New US/Canadian contracts for H2O Innovation
Canadian H2O Innovation Inc announced on 21 December 2011 that it had recently been awarded new membrane water-treatment contracts totalling Can$ 4.7 million (US$ 4.6 million).
SWMOA looking for Annual Symposium presenters
The Southwest Membrane Operator Association (SWMOA) is looking for presenters for its 2014 Annual Symposium to be held in Santa Rosa, CA in May.
MBR technologies help expand Queensland treatment plant
A sewage treatment plant in Queensland, Australia, will double its capacity to 1,000 m³/d with the help of membrane bioreactor technologies provided by GE.
Sinochem setting up seawater desalination industrial base
Sinochem Corp held a ground-breaking ceremony for a seawater desalination industrial base in Hangzhou, China, on 22 March 2011, coinciding with World Water Day