2016 Finalists
Stockholm Junior
Water Prize

The Stockholm Junior Water Prize
Each year, the Stockholm Junior Water Prize congregates young scientists and innovators from around the world who have created new
solutions to the planet’s growing water challenges. Each of the finalists represented in Stockholm are the champions of their national
competition and have been selected as winners from thousands of entries for their outstanding work.

This year we are proud to host the 20th
annual competition and welcome thewinners of national competitions from 29
countries: Argentina, Australia, Bangladesh,
Belarus, Canada, Chile, China, Cyprus,
Finland, France, Germany, Hungary, Israel,
Italy, Japan, Latvia, Mexico, Nigeria, Norway,
Russian Federation, Singapore, South Africa,
Spain, Sweden, Thailand, Turkey, Ukraine,
United Kingdom and United States.
The Stockholm Junior Water Prize
competition proves that brilliant young minds
can find inspiration in unlikely places.

They see opportunity and hope where others
find challenges and have developed costefficient and immediate solutions, applicable
the world over. In this catalogue, you canlearn more about the innovative research andinventions that earned each of the finalists a
place to compete for this international honor.
All the finalists are invited to Stockholm
for the special opportunity to meet withpresent leaders of the global watercommunity and to make life-long friendships
with likeminded from around the world whoshare the passion for water and science.

This visit includes the chance to receive
the international prize from H.R.H. Prince
Carl Philip of Sweden during an exciting
award ceremony which will be held this year
on Tuesday 30 August at the Grand Hôtel
in Stockholm.
World Water Week participants havethe opportunity to meet this next
generation of water leaders by visiting theirposter exhibition.

The international jury
The competitions’ International Jury includes experts within thefield of water who appoint the winner of the international final bycommittee consensus. The decision is based on the finalists’ written
report, a short presentation of their display material and threerounds of interviews. The jury members are appointed by StockholmInternational Water Institute Board.
All members of the jury has extensive experience and represents
a wide range of disciplines from natural to social sciences in order toensure all projects are equally reviewed and judged.

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The 2016 International Jury Members
Dr Fredrik Moberg (Chair), Sweden
Dr Jo Burgess, South Africa
Ms Belinda Abraham, Canada
Ms Danka Thalmeinerova, Sweden
Prof Yoshihisa Shimizu, JapanMr Johan Bratthäll, Sweden
Prof Krishna R. Pagilla, USA

About the Stockholm Junior Water Prize competition
The competition is open to young people
between the age of 15 and 20 who haveconducted water-related projects at local,
regional, national or global levels with environmental, scientific, social and/or technological importance.

The aim of the competition is to increaseawareness, interest and knowledge of waterand the environment.
The international winner will receive a
USD 15,000 award and a prize sculpture,
the winner’s school receives USD 5,000

and the winner of the Diploma of Excellence
USD 3,000. H.R.H. Crown Princess Victoria
of Sweden is the Patron of the Stockholm
Junior Water Prize and Xylem Inc. is thefounding global sponsor.

Argentina, Australia, Bangladesh
Belarus, Canada, Chile
China, Cyprus, Finland
France, Germany, Hungary
Israel, Italy, Japan
Latvia, Mexico, Nigeria
Norway, Russian Federation, Singapore
South Africa, Spain, Sweden
Thailand, Turkey, Ukraine
United Kingdom, United States2015 Stockholm Junior Water Prize
finalists

Cover Photo: Jonas Berg
Design by: Elin Ingblom, SIWI.
Printing by Molind. The printing process has been certified according to the Nordic Swan label forenvironmental quality. For electronic versions of this and other SIWI publications, visit www.siwi.org.

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Photo: Jonas Berg

Index

2016
Stockholm
Junior
Water
Prize
Finalists

4
National
Organiser
Asociacion
Argentina deIngeniería Sanitaria y Cienciasdel Ambiente(AIDISArgentina)
Sponsors
Aysa, Xylem
Water
Solutions
Argentina S.A.,
Ecopreneur

National
OrganiserHouse of
Volunteers
Foundation
Sponsors
House of
Volunteers
Foundation
Bangladesh,
WaterAid
Bangladesh

Argentina
Usage of eggshell to remove ironfrom water
Florencia Franzoni
The objective of this investigation was toevaluate the removal of iron through afilter made out of eggshell to decrease
the concentration of this mineral ingroundwater. Iron concentrations were
measured with a colorimetric test.
The investigation concludes that theuse of this filter medium was effective,
achieving an average iron removal of 83
per cent. Filter residues can be used inagriculture as a natural fertilizer.

National
Organiser
Australian
Water
Association
Sponsors
Xylem

Australia
The effect of surface area of Elodea
canadensis on the assimilation of
nitrate in effluent
Mohamed Jakaria
Excessive levels of nitrate in effluent
discharged from wastewater treatment
plants leads to environmental issues suchas eutrophication. This study investigates the efficiency of Elodea canadensis
in assimilating nitrate in effluent as analternative tertiary wastewater treatment
method. The results showed Elodea
canadensis as an effective nitrate assimilator having significant reduction in nitratelevels over 48 hours. It was concluded
that further research involving othermicronutrients is needed to make significant claims about an alternative method
to tertiary wastewater treatment.

Bangladesh
Purification of drinking water using coconut shell–based activated carbon (PDWCAC)
Bakhtiar Zaman Bhuiyan
In Bangladesh there is a crisis concerning safe drinking water as pond, riverand lake water is often contaminated.
Microorganisms present in water cause
diarrhoea, typhoid, rotavirus, Vibrio
cholera, and species of Shigella. Coconut
shell-based activated carbon is effective
for removing microbial pathogens andalso chemical impurities. A copper coilfiltration system is used to reduce thelevels of bacteria in the water through a“oligodynamic effect.“ Copper ion breaks
down the bacterial fungi, algae andharmful microbes due to its toxic effects
on living cells.

5National
Organiser
Republican
EcologicalCenterSponsors
Coca-Cola
Beverages
BelarusBelarus
Baltic salmon spawning in the riversof Belarus: what is the reality?
Dzianis Marach
Despite not having direct access to theBaltic Sea, Belarus does experience problems in its environment. One of these is
the lack of spawning places for anadromous salmon fishes ie- sea trout andatlantic salmon. Nowadays, a few spawning places exist on some rivers in Belarus.
They are small tributaries of the Vilia
river and have vulnerable ecosystems. The
author of the project made long-termand complex investigations of this regionin order to reveal the ecological situation on these rivers. The region is poorly
researched and some hydrobiological datais newly obtained for the rivers.

National
Organiser
General Water
Directorate(Ministery of
Public Works),
Conaphi-Chile,
Caazalac, Aidis,
Sochid, Alhsud.
Sponsors
Aguas Andinas,
Colbún, Nestlé
Partnership:
Fundacion Chileand Ministeryof Education

National
Organiser
Western
Canada Water
Environment
Association
Sponsors
Xylem Water
Solutions
Canada,EramosaEngineering
Inc., GE Water& ProcessTechnologies,
SEW-Eurodrive

CanadaImpact of an oil spill and emergency
response on thick-billed
Murre Feathers
Caitlyn Pratt
Oil spills and emergency response
can involve use of dispersants. These
substances affect the feather microstructure/mass of Thick-billed Murres(Uria lomvia), a North Atlantic seabird.
In particular, its survival if its insulatingfeathers are compromised. An oil spill
environment was mimicked by exposing
feathers to seawater and seawater withoil, oil with dispersant and dispersantand determining a feather amalgamationindex. Results showed dispersants harmedfeather waterproofing adding to thediscussion of dispersant use, alternative
mitigation tactics and changing dispersant use regulations.

Chile
Fogs catchers of Atacama, care and preservation of regional flora and fauna
Brittany Paredes and Paula Dvorquez
While drinking water is in increasingly
short supply on a global scale, significant
sources remain untapped. These include
the camanchaca, a thick, highly dynamic,
notably moisture-laden fog common
across northern Chile. Harvesting waterfrom airborne moisture is a long-standing
technique that could prove valuable ineasing the water shortages currently

affecting both human and animal
populations across the arid spans ofnorthern Chile.

2016
Stockholm
Junior
Water
Prize
Finalists

6
National
Organiser
The Center for
Environmental
Education &Communications of State
Environmental
Protection
Administration(SEPA CEEC)
Sponsors
Guangdong
University ofTechnology,
Foshan Municipal Bureau of
Water Affairs,
Nanjing Automation Instituteof Water Conservancy andHydrology, theXylem Inc.
National
Organiser
Association of
Biology andGeography
Teachers
Sponsors
Kemira,HelsinkiRegionEnvironmental
Services
Authority HSY

China
Test and popularization of ultrasonicalgae removing system in reservoirs
in Foshan
Zeming Zhang, Zhongpei Luo andShiyong He
This project was the the development ofan environmentally friendly ultrasonicalgae removal system, consisting of intelligent controlling software, UAV, patrolling boat and buoy-type ultrasonic algae
removal device. The system is fully-automatic in monitoring algae distribution toremove excessive algae in time. Satisfying
results have been achieved during testing,which can effectively remove cyanobacteria and Chlorophyta, and inhibit thegrowth of algae. At present, the device has
already been applied to Foshan DongfengReservoir.

National
Organiser
Water Museumof Lemesos
Sponsors
PWC,Hellenic
Bank, Bankof Cyprus,
Green-dot, USB
Bank, Sewerage
Board of Lemesos-Amathus,
Water Boardof Lemesos,
Phileleftheros
Newspaper

CyprusAlternative ballast water treatment
for sustainable transportation
Alexandra Christofi, Thaleia
Sofokleous and Maria Charalambous
In this project, we propose the use ofsilver nitrate embedded on alumina fortreating water ballast in ships. Ballast
water is used in ships when they have nocargo in order to provide them balance,and once they load the cargo they discard
it in the sea. This ballast water howevercontains various microorganisms which
pollute sea water. We investigated the effectiveness of killing E.coli bacteria using
the catalyst we created. The results weresignificant especially given the catalyst iseffective and cheap.

Finland
Effect of the Baltic Sea Water to the Germination and Growth of Different Type of Plant Seeds
Liina Yliheikkilä
In this project I used seeds of typicaltrees from Finnish nature and seeds ofcommon garden plants. The seeds wereplanted every week and the last seeds after
they had been in the sea water for three
weeks. The planting was also done without affecting the seeds to the sea water,
so comparison to normal conditions was
possible. Tomato and radish seeds wereable to germinate after exposed to the sea
water, but salad seeds were not. However,
it is difficult to conclude the ability of thetypical tree seeds to germinate, because
their germination in normal conditions
was poor.

7
National
Organiser
Office-français dela Fondation pourl’éducation à
l’environnement
en EuropéSponsors
The Ministryof National
Education,
Higher Education
and research,
The Ministry ofEnvironment,
Energy, and Sea,
The 6 French
Water Agencies,
The French Water
Partnership, Sciences & Vie JuniorFranceThe dead water phenomenon
Harmand Thomas, Delorme Louis andHerve Titwan
Global warming could open maritime
ways through the pole in summer. But,a curious phenomenon occurs when theice melts. Ships are sometimes retainedby a mysterious force. Where does itcome from? In a tank, in which werelease two layers of water, one salted andthe other “pure” and coloured, a little
boat is pulled by a traction system witha constant strength. A high amplitude
wave was formed on the two liquid layersinterface. The boat velocity oscillated insynchronism with the interfacial wave. A
wave is formed on the interface with such
amplitude that the boat’s movements canbe impacted.

National
Organiser
Global Water Partnership Hungary
Sponsors
Hungarian Water
Utility Association, Budapest
Waterworks, GE
Water & Process
Technologies,
Xylem, Grundfoss,
HungarianEnergy and Public
Utility Regulatory
Authority

National
Organiser
Stiftung Jugend
forscht e. V.
Sponsors
FederalMinistry of
Education
and Research,
Germany

Germany
Odour removal of wastewater byusing ferrous scrap
Johannes Harald Hammer
In my research work I try to find out how
I can remove the hydrogen sulphide inwastewater by using an electrochemical
reaction of ferrous scrap, because hydrogen sulphide causes some problems inthe sewer tunnel. Due to its characteristic
smell of rotten eggs it generates complaints and it also determines corrosionof concrete. The aim of my research was
to investigate if it is possible to lower thehydrogen sulphide content in wastewater
simply by using ferrous scrap and thepower of a solar panel, and if it is possible
to ascertain the optimum value of theneeded power.

Hungary
What can we gain by using greywater?
David Kovacs and Akos Ivan Szucs
This project statistically verifies what
economic and water savings are possiblein schools and households by reusing
rainwater and greywater from handwashing. Furthermore, this researchpresents both the inhibiting factors andthe problems of greywater usage, while
it also explores the possible reasons why
young people waste water at school.

The research is additionally aided bya short film which raises awareness onenvironmental protection for high-school
students.

2016
Stockholm
Junior
Water
Prize
Finalists

8
National
Organiser
Tel-Aviv
University,
Manuel andRaquel Klachky
Fund, JNF,
Israeli NewTech
Program, Water
Authority
Sponsors
Tel-Aviv
University,
Manuel andRaquel Klachky
Fund, JNF,
Israeli NewTech
Program, Water
Authority

National
Organiser
Japan Water
Prize Committee(JWPC), Japan
River Association
Sponsors
Lion Corporation,
CTI Engineering,
Nippon Koei,
Tokyo Construction Consultants,
Pacific Consultants, Executive
Committee ofRiver Day

IsraelHarnessing biomimicry for reducing
biofouling in irrigation systems by
micro-topographic structures
Lipaz Harodi
Drip irrigation systems save water but
microorganisms settlements on the devices’
walls cause clogging. Today’s solutions forbiofouling use harmful chemicals. This
work suggests a sustainable technical solution, based on a micro-topographic structure mimicking shark skin, that enhances
water turbulence which prevents biofouling. Using 3D modeling and printing wehave manufactured surfaces which mimic
this structure toward developing pipes anddrippers for irrigation system. Controlled
and systematic experiments using plates
proved biofouling reduction both underwater flow and in still water.

National
Organiser
Federazionedelle Associazioni Scientifichee Tecniche(FAST)
Sponsors
Aica, Atm,
Foist, Xylem,
Milset Europe,
3M

Italy
Boiling water reveals its secrets
Gianluca Pasquini and Erica Melelli
The aim of this research is to distinguishdifferent ways of warming water up toboiling point and maintaining it at thatpoint for four minutes by means of Infrared Spectroscopy. We take into accounttwo vibrations of the water molecule: thesymmetric stretching and the bending of
the OH group. Three systems of warming are used: microwave oven; electricalheater; Bunsen burner. The average wave
number of the two OH vibrations andtheir variances are calculated and used
to plot suitable graphs that allow us tohighlight the differences.

Japan
Development of inexpensive and novel real-time biomonitoring system using alternative organisms
Naoki Hamada, Kyuya Matsumoto and Kaname Harada
The pollution of water by chemical
substances can harm humans and affectecosystems. We aimed to develop a
low cost, yet high accurate, automatic
bio-monitoring system to ensure drinking
water. We created an innovative toxicity
monitoring system using three kindsof bio-monitoring at the same time.
It enables us to detect harmful

influences given by chemical substances
more comprehensively. It is expectedthat costs of toxic materials test will be reduced substantially because our system isvery small and monitored by computers.

9National
Organiser
Education,
Culture andSports Department of Riga
City Council
Sponsors
Riga City
Council, Riga
Water,
University ofLatviaLatviaExperimental application of phytoremediation terraces in water purification from heavy metal ions
Haralds Baunis, Irina Česnokova
The aim: investigate the suitability of the
many-leaved lupine,coriander and garden
parsley for their application in phytoremediation terraces to remove heavy metal
ions. Plants were grown on a scaled modelof a phytoremediation terrace and wateredusing a solution containing zinc, nickel,
lead and copper ions. After 30 days, plant
and water samples were collected andanalysed using a flame atomic absorption
spectrometer. Results indicated a nearly
absolute decrease in concentration ofheavy metal ions in water samples, while
the plant samples exhibited signs of accumulation of heavy metal ions.

National
Organiser
Pan African
Vision for theEnvironment(PAVE)
Sponsors
Embassy of
Sweden in
Nigeria, Pan
African Vision
for theEnvironment(PAVE)

National
Organiser
FEMISCA,
Institute ofEngineering,
UNAM
Sponsors
AAK México, S.A.
de C.V., ABB
México, S.A. de
C.V., Alfa Laval, S.
A. de C. V., Atlas
Copco Mexicana,
S.A. de C.V., Ericsson Telecom, S.
A. de C. V., Grupo
Urrea, Sandvik deMéxico, S.A. de
C.V., SCA Consumidor MexicoCentro América
Tetra Pak, S.A.
de C.V.

Nigeria

MexicoReclaim water integral system of
wetlands and tertiary treatment for asustainable vision
Gabriel David Alejandro Trujillo,
Eunice Yaneli Masegosa Gaona andCarlos Castellanos Dominguez
Water scarcity and pollution is an internationally growing problem. The aim of
this project is to mitigate this througha pilot plant that combine an artificial
wetland, electrofoculation process and apurification system to promote the use ofreclaim water for small agricultural activities and school uses (such as bathroom
discharges and cleansing). The results
show that the use of this scheme warrants
the removal of organic matter, faecal coliforms, oils, grease and nutrients. Nevertheless, it is necessary to perform moreexhaustive and specific tests to confirm
the results obtained in this research.

Water Education for Schools and Communities in Lagos Project
Adeleke Victor Ademola and Idris Omogbolahan Musa
The broad aim of the Water Educationfor Schools and Communities in Lagos
Project is to promote better understanding of water as a key social, economic andenvironmental resource and to facilitate a
new water-use ethic in Nigeria. It is about
the community’s sense of duty – theobligation members have to each other,to the use of water itself and to future
generations.

2016
Stockholm
Junior
Water
Prize
Finalists

10
National
Organiser
FrognkommuneSponsors
Norsk Vann
– Norwegian
Water, GVD,
VAV, NVE

National
Organiser
Lien Foundation
and Ngee Ann
Polytechnic
SponsorsNgee Ann
Polytechnic,
Lien Foundation,
PUB, Singapore’s National
Water Agency

NorwayWhat is so special about Pollevann?
Susanne Havsberg and Mathilde
Glende Klausen
Pollevann is a proglacial, meromictic lakein Ås Municipality, formed as a result of
the isostatic uplift after the last ice age.
It is a vulnerable wetland area whichbecame a nature reserve in October 1992.
By measuring the pH value, conductivity,
colour of the water, visibility, smell andtemperature we have seen how the water
quality is affected by the lake previously
being a part of the ocean. The results
showed how the water is separated into
different layers with saltwater at the bottom and how the lake is affected by its
history.

Singapore

National
Organiser
Environmental
Projects Consulting InstituteSponsors
Federal Ministry of Natural
Resources andEcology, Federal Center for
Water Complex
Development,
Federal Agencyof Water Resources, CocaCola Hellenic
Russia, State
Atomic Energy
Corporation“ROSATOM”,
State ResearchCenter “Planeta”

RussianFederation
A study of bacteriologic status of water
reservoirs in Morozovsky district
Tatiana Sheremetova andIvan Sheremetov
The influence of bacterial contaminationof 37 water bodies on development of
cattle breeding in the district was studied.
Seasonal changes of selected indicators –total bacterial count, coli-titer, Coli-index
were analyzed on the basis of 5-year studyof 4,218 water samples. Bacteriologicalanalysis of water and biologic samples
revealed the disease pathogen. Then wedeveloped and implemented schemesof vaccination of cattle, which helped
protect the animals from pathogenic
microorganisms and preserve breeding
stock. Proposed schemes were later implemented in the five farms before grazing
season.

Dishwashing detergent: How much is enough? Conserve water; reduce chemical waste and save money
Orion Lee Young Xun, Rasheed Muhammad and Muhamad Raimi Rosian
Surfactants are known to be harmful tothe environment but its usage cannot be
totally eliminated. This project determines the minimum effective concentration of surfactants that exhibits required
detergency effect, reducing surfactants
used. Dishwashing detergent was used as
the study model. Dishwashing detergentsat critical micelle concentrations (CMC)

levels were found to exhibit excellent
degreasing effect. Finally, an education
card was devised to educate consumers
on appropriate amounts of detergent required, thereby conserving water, reducing wastewater and saving money.

11
National
Organiser
Department of
Water Affairs
and Forestry
Sponsors
Water ResearchCommission,
Department of
Science andTechnology,
Cape PeninsulaTechnology,
Coca-Cola

National
Organiser
Förbundet Unga
ForskareSponsors
Xylem

South Africa
Saving water drop by drop
Driaan Lou Kemp
My project focuses on collecting cleanwater which is wasted when turning on
the shower and waiting for the water toheat up to the desired temperature. Experiments were conducted in my home over anumber of days to determine the amountof water that is wasted when the shower
is on while waiting for it to heat up. This
led to the development of a device/modelthat allows the cold water to be diverted toa container and only allow water to flowout of the shower head when it is at, orabove, the desired temperature. The saved
diverted cold water in the container could
then be used to wash the dishes, water theplants or even as drinking water as it isalready treated water, thereby saving theconsumption of water.

National
Organiser
La Escuela delAgua
Sponsors
Fundación
Aquae

Spain
Reclaimed water, a further stepPep Pou Coll
The objective is to improve the water’ssustainability in the city of Figuere by
regenerating and reusing residual water inthe environment and the urban areas. The
lack of water is a serious worldwide problem. The availability of water depends on
various factors, such as nature, technological factors, climate change or an increaseof the population among others. I realisedthat “Figuere’s conca” is suffering a water
shortage and the water treatment plantin Figuees is carrying water that directly
affects the ecological state of water.

SwedenVattholmsskärens nature reserve
Eric Marcus
This thesis is about trying to create
Sweden’s first freshwater reserve.
The reserve covers three rocky islandsin the middle of lake Siljan. My research
has shown that these three islands play
an important role for fishes, birds and foroutdoor life. The islands give a maritime
feeling and is a place for maritime birds
to nest. My study has also shown thatthe site plays an important roll for the

reproduction of fish. Since my project
was finished, severel steps have been taken
by Leksands municipality to create thereserve. The formal decision will be taken
by politicians in August.

2016
Stockholm
Junior
Water
Prize
Finalists

12
National
Organiser
The Institutefor the Promotion of Teaching
Science technology (IPST)
Sponsors
IPST, Nestlé
Thailand,Government
Savings Bank

National
Organiser
NGO Ukrainian
water society“WaterNet”
Sponsors
Dow Europe
GmbH, Ecosoft
SPC LLC, NTUU
“Kiev Polytechnic Institute”,
Ministry of
Ecology andNaturalResources of
Ukraine, PC“Kyivvodokanal”

ThailandNatural innovative water retention
Mimicry Bromeliad (Aechmea
aculeatosepala)
Sureeporn Triphetprapa, Thidarat
Phianchat and Kanjana Komkla
The natural innovative water retention mimicryof the Bromeliaceae was investigated to examine
the efficacy of the natural water collection byplants, specially in terms of the shape of theplants that can collect and capture the water.
The finding indicated that aechmea aculeatosepala constitutes crucial multiple parts to retain
water. We adopted to model the mimic water
retention device. In the real application, the unit
is installed on the rubber tree. It found that soil
moisture when the device is installed represents
17.65 per cent greater than that non-installation,and is 57.50 per cent more productive.

UkraineNational
Organiser
General
Directorate ofState HydraulicWorks (DSI)
Sponsors
DSI Foundation

TurkeyThe use of silkwork cocoon waste as
an alternative sorbent for removal ofoil from water
Gizem Agtas, Gizem Baykal
Removal of oil which is spread in thesea by tankers or water treatment plants
is the aim of this project. Comparative
experiments are done between silkworm
cocoon waste and chicken feathers. It isshown that silkworm cocoon waste hashigher absorption capacity. As a result,a practical and environmentally friendly
product has been assumed and designed.
This product consists of silkworm cocoon
waste, which is cut in half, attached to afishing line which is attached to a propeller in one end and swivel in the other.
It is projected to be integrated to sea
vehicles in order to increase absorption.

A novel approach to flood control
Mariia Krokis
A fundamentally new method of combating floods has been invented, deepening
river beds in places with small slopedbottom and by installing controllable rifts
in deep places. By setting the parametersof rifts opening and closing, one can, ina wide range, maintain a stable level ofwater regardless the atmospheric precipitations. The offered method, which was
experimentally tested at several working
models of river beds, has shown high ef-

ficiency in all proportions of depth
and width and slopes of the bottom.
The funds will pay-off already for a few
strong showers.

13
National
Organiser
CIWEM (Chartered Institutionof Water andEnvironmental
Management)
Sponsors
Chartered Institution of Water
and Environmental Management,
Cranfield University, Severn Trent
Water Limited

Perry Alagappan
from the UnitedStates received the2015 Stockholm
Junior Water Prize
for inventing a filter
through which toxic
heavy metals fromelectronic waste
can be removed
from water.

United Kingdom
FLOW: A system that repurposes grey
water in the home
Anna Morris, Jenny Rodgers
On average, 150 Litres of water are used
per person per day in the UK, and bathing, showering and toilet use accountfor a large proportion of this total use.
FLOW is intended to repurpose shower
or bath water to reuse as toilet water. As
toilet water is not required to be chemically clean, but should be clear, a Light
Dependent Resistor (LDR) is used todetect its clarity. Clear water is allowed
straight through into the tank and dirty
water is diverted by a solenoid valve
into normal waste. The system could be
adjusted for different users to choose theclarity of their toilet water.

National
Organiser
Water Environment Federation
Sponsors
Water Environment Federation,
Xylem, IncUSA
Experimental studies in developing
safe sanitation solutions
Nishita Sinha
2.4 billion worldwide lack access to safe
in-home toilets. In countries like India
open defecation leads to the spread ofgerms and waterborne diseases. An inexpensive option is the Sulabh International
2-pit Composting toilet. Though thistoilet effectively turns solid waste into
fertilizer, I showed that liquid waste thatseeps into soil, and eventually drinking
water sources, is ripe with germs. I usednatural additives and varying electricfields to create a cheap, sustainable solution that minimizes water contamination.
I also raised funds for toilet installationand encouraged education.

2015 Stockholm Junior Water
Prize Winner”I am surprised, but so honoured, to win this award. I want tolaunch my study as open source technology that others can use
and build upon in their research. This way, I think we can solve
really big issues,” said Perry after having received the award.
The Jury was impressed by Perry’s passion and long-term
commitment to the research and its practical application.
“This project addresses a critical water issue with broad
implications for the whole world. Through its sound scienceand sustainable technology, the solution is scalable from household to industrial scale for a broad range of applications,” said
the Jury in its citation.

Stockholm Junior Water Prize Winners, 1997-2015

2016
Stockholm
Junior
Water
Prize
Finalists
2015| Perry Alagappan, USA“Novel renewable filter for heavy
metal removal”

142014 | Hayley Todesco, Canada“Waste to water: Biodegrading		naphthenic acids using novel		sand filters”
2013 | Naomi Estay & Omayra Toro,
Chile“Psychiobacter: Antarctic
		co-operation on bioremediation
		of oil-contaminated waters”
2012 | Luigi Marshall Cham, Jun Yong
Nicholas Lim and Tian Ting
Carrie-Anne Ng, Singapore“Investigation of the use of		sodium-activated bentonite clay
		in the removal and recovery of		non-ionic surfactants from		wastewater”
2011 | Alison Bick, USA“Development and evaluation
		of a microfluidic co-flow device
		to determine water quality”
2010 | Alexandre Allard and Danny		Luong, Canada“Research on biodegradation of
		the plastic polysterene”
2009 | Ceren Burçak Dag, Turkey“A solution to energy-based
		water contamination: Rain as an		alternative environmentally		friendly energy source”

2008 | Joyce Chai, USA“Modelling the toxic effects ofsilver nanoparticles under varying environmental conditions”
2007 | Adriana Alcántara Ruiz, Dalia
Graciela Díaz Gómez and Carlos
Hernández Mejía, Mexico“Elimination of Pb(II) from water
via bio-adsorption using
eggshells”
2006 | Wang Hao, Xiao Yi and Weng Jie,
China
“Application research andpractice of a comprehensive
technology for restoring urbanriver channels ecologically”
2005 | Pontso Moletsane, Motebele
Moshodi and Sechaba
Ramabenyane, South Africa“Nocturnal hydro minimiser”
2004 | Tsutomu Kawahira, Daisuke
Sunakawa and Kaori Yamaguti,
Japan“The organic fertilizer –An alternative to commercial
fertilizers”

2001 | Magnus Isacson, Johan
Nilvebrant and Rasmus Öman,Sweden“Removal of metal ions fromleachate”
2000 | Ashley Mulroy, USA“Correlating residual antibiotic
contamination in public water tothe drug resistance ofEscherichia Coli”
1999 | Rosa Lozano, Elisabeth Pozo andRocío Ruiz, Spain“Echinoderms as biological		indicators of water quality in the
		Alborán Sea coast”
1998 | Robert Franke, Germany“The Aquakat – A solar-driven
reactor for the decontaminationof industrial wastewater”
1997 | Stephen Tinnin, USA“Changes in development, sperm
activity and reproduction acrossa 105 exposure range in
Lytechinus Variegatus Gametes
exposed to pesticides in marine
media”

2003 | Claire Reid, South Africa“Water wise reel gardening”
2002 | Katherine Holt, USA“Cleaning the Chesapeake Baywith oysters”
WWW.SIWI.ORG/
STOCKHOLMJUNIORWATERPRIZEWater is infinitely renewable but theamount of water on earth is fixed.

15

OUR WATER,OUR CLIMATE,

LET’S TAKEACTION.

At Xylem, we help our customers
implement sustainable solutions totheir water challenges. We design andmanufacture the world’s most advanced
technologies to move water, treat waterand test water in sustainable ways. Our
12,500-strong global team is dedicatedto expanding access to clean, safe water
today and renewing this valuable resource
for future generations.
We look to a future where global water
issues do not exist. And everyday, we get
one step closer.
Let’s solve water.

xylem.com

Do you want to be part of the Stockholm Junior Water Prize?
If you are interested in leading a national competition in your country or would like to learn more
about sponsorship opportunities for the Stockholm Junior Water Prize, please contact
ania.andersch@siwi.org

FOUNDING GLOBAL SPONSORCONTRIBUTOR

WITH THANKSS TO CK H O L M I N T ER N ATI O N A L
WAT ER IN S T IT U T E , SIW I
Box 101 87 | SE-100 55 , Stockholm, Sweden
Visiting address: Linnégatan 87A
PHONE +46 121 360 00 • FA X +46 121 360 01
EMAIL siwi@siwi.org • www.siwi.org