Bringing clean water to developing nations

Dec 10, 2013 by David L. Chandler
Bringing clean water to developing nations
Pure Home Water has reached more than 100,000 poor rural women, children, and families with safe drinking water via ceramic pot filters produced at a factory in Tamale, Ghana.

"It's been a long, hard slog," says Susan Murcott, a senior lecturer in MIT's Department of Civil and Environmental Engineering, describing her efforts to disseminate water-filtration systems to some three million people in northern Ghana. About half of these people presently lack access to a reliable supply of clean drinking water. But after nine years of efforts by Murcott and her students, the project has begun to make a difference.

Factories that produce these locally sourced, clay-pot filters—originally invented by Fernando Mazariengas of Guatemala and since improved and widely disseminated by Murcott and others—have already been built at 52 locations in 31 countries, she says, with the newest of these factories in Guatemala, Uganda, South Africa, and China. So far, the Ghana factory, built in 2011 and reaching full production last year, has provided sustainable, safe drinking water to more than 100,000 people in that country's impoverished, rural northern sector. In January, 10 MIT students will work there to help expand production and monitor outcomes.

The filters—made with a mixture of local clays and precisely sieved, combustible material, such as rice husks—have been shown to reduce microbial contamination in water by 98 percent, leading to a more than two-thirds decrease in diarrheal disease among families using them. The combustible material burns off when the clay is fired, leaving a network of tiny pores that serve to filter out sediment and microbes as water trickles through; the filter is further treated by the application of colloidal silver nanoparticles that have antimicrobial properties. One such filter can produce enough daily to serve the needs of a large family.

Murcott and colleagues recently received grants from the government of Dubai, which will allow them to expand production and distribution in Ghana, Guatemala, and Nepal.

In addition to clean water, Murcott has worked to improve sanitation in Ghana, where most communities lack improved toilet facilities. Together with D-Lab student John Maher and Ghanaian volunteers, and with support from the MIT Public Service Center, she recently built a large latrine facility at a school in Taha, Ghana. The team will expand in January to a neighboring village, Gbalahi, which is seen as a critical step toward reducing preventable contagion.

About the size of New York state, "Ghana today has the fifth-worst rate of sanitation in the world," Murcott says, citing United Nations statistics. Open defecation is common, especially in the poorer, rural northern parts of the country.

Murcott began her career designing innovations for large urban sanitation systems, such as the wastewater treatment plant on Boston's Deer Island, but soon realized that the greatest need for sanitation lay in rural, poor regions or urban slums where such systems were unaffordable. She has since turned her attention to improving access to water, sanitation, and hygiene in developing nations.

But it's been a hard road, she says: Everything has taken longer than expected, with difficulties in supply chains, communication—Ghana has more than 50 different languages—illiteracy, and poverty. The filtration systems produced by the factory Murcott's company set up cost $10 to make, but are sold for $6 to the rural poor—still a steep price in a place where most people earn less than $1 a day. (Large agencies have sometimes paid full price and then given the filters away for free.)

But the country is politically stable, most people with a primary level of education speak some English, and "the people are really friendly and welcoming," she says. "That's what has kept me going back."

Murcott says her commitment to the production of these filters in Ghana over the last nine years has been driven by two things: maintaining trust with the people of that region and the project's impact on MIT students—roughly 125 of whom have traveled to Ghana. "Part of the reason I do this work," she says, "is I like to see students have their worlds blown open, to have them realize it's a bigger world out there than just here."

Explore further: Singapore champions sanitation on first World Toilet Day

add to favorites email to friend print save as pdf

Related Stories

New water-filter factory in Ghana

May 06, 2011

In northern Ghana, that nation’s poorest and most rural region, most families get their drinking water from rivers or large, shallow ponds. The water in these bodies, which are also used by livestock, is clouded with ...

In the World: Clean Water for Ghana

Apr 30, 2010

Nearly 1 billion people do not have access to clean drinking water. The problem is particularly dire in Ghana, where diarrhea causes 25 percent of all deaths of children below the age of five each year, according ...

MIT engineer works toward clean water, more

Mar 05, 2007

An MIT engineer working toward clean drinking water in Nepal describes in a recent issue of the Journal of International Development how people from developed and developing countries can work together to solve key humani ...

Recommended for you

Large streams of data warn cars, banks and oil drillers

Apr 16, 2014

Better warning systems that alert motorists to a collision, make banks aware of the risk of losses on bad customers, and tell oil companies about potential problems with new drilling. This is the aim of AMIDST, the EU project ...

User comments : 0

More news stories

Tiny power plants hold promise for nuclear energy

Small underground nuclear power plants that could be cheaper to build than their behemoth counterparts may herald the future for an energy industry under intense scrutiny since the Fukushima disaster, the ...

Hand out money with my mobile? I think I'm ready

A service is soon to launch in the UK that will enable us to transfer money to other people using just their name and mobile number. Paym is being hailed as a revolution in banking because you can pay peopl ...

Classifying cognitive styles across disciplines

Educators have tried to boost learning by focusing on differences in learning styles. Management consultants tout the impact that different decision-making styles have on productivity. Various fields have ...