This Tower Pulls Drinking Water Out of Thin Air



Designer Arturo Vittori says his invention can provide remote villages with more than 25 gallons of clean drinking water per day

By Tuan C. Nguyen
SMITHSONIAN.COM
APRIL 8, 2014

In some parts of Ethiopia, finding potable water is a six-hour journey.

People in the region spend 40 billion hours a year trying to find and collect water, says a group called the Water Project. And even when they find it, the water is often not safe, collected from ponds or lakes teeming with infectious bacteria, contaminated with animal waste or other harmful substances.

The water scarcity issue—which affects nearly 1 billion people in Africa alone—has drawn the attention of big-name philanthropists like actor and Water.org co-founder Matt Damon and Microsoft co-founder Bill Gates, who, through their respective nonprofits, have poured millions of dollars into research and solutions, coming up with things like a system that converts toilet water to drinking water and a "Re-invent the Toilet Challenge," among others.

Critics, however, have their doubts about integrating such complex technologies in remote villages that don't even have access to a local repairman. Costs and maintenance could render many of these ideas impractical.

"If the many failed development projects of the past 60 years have taught us anything," wrote one critic, Toilets for People founder Jason Kasshe, in a New York Times editorial, "it's that complicated, imported solutions do not work."

Other low-tech inventions, like this life straw, aren't as complicated, but still rely on users to find a water source.

It was this dilemma—supplying drinking water in a way that's both practical and convenient—that served as the impetus for a new product called Warka Water, an inexpensive, easily-assembled structure that extracts gallons of fresh water from the air.

The invention from Arturo Vittori, an industrial designer, and his colleague Andreas Vogler doesn't involve complicated gadgetry or feats of engineering, but instead relies on basic elements like shape and material and the ways in which they work together.

At first glance, the 30-foot-tall, vase-shaped towers, named after a fig tree native to Ethiopia, have the look and feel of a showy art installation. But every detail, from carefully-placed curves to unique materials, has a functional purpose.

The rigid outer housing of each tower is comprised of lightweight and elastic juncus stalks, woven in a pattern that offers stability in the face of strong wind gusts while still allowing air to flow through. A mesh net made of nylon or polypropylene, which calls to mind a large Chinese lantern, hangs inside, collecting droplets of dew that form along the surface. As cold air condenses, the droplets roll down into a container at the bottom of the tower. The water in the container then passes through a tube that functions as a faucet, carrying the water to those waiting on the ground.

Using mesh to facilitate clean drinking water isn't an entirely new concept. A few years back, an MIT student designed a fog-harvesting device with the material. But Vittori's invention yields more water, at a lower cost, than some other concepts that came before it.

"[In Ethiopia], public infrastructures do not exist and building [something like] a well is not easy," Vittori says of the country. "To find water, you need to drill in the ground very deep, often as much as 1,600 feet. So it's technically difficult and expensive. Moreover, pumps need electricity to run as well as access to spare parts in case the pump breaks down."

So how would Warka Water's low-tech design hold up in remote sub-Saharan villages? Internal field tests have shown that one Warka Water tower can supply more than 25 gallons of water throughout the course of a day, Vittori claims. He says because the most important factor in collecting condensation is the difference in temperature between nightfall and daybreak, the towers are proving successful even in the desert, where temperatures, in that time, can differ as much as 50 degrees Fahrenheit.

The structures, made from biodegradable materials, are easy to clean and can be erected without mechanical tools in less than a week. Plus, he says, "once locals have the necessary know-how, they will be able to teach other villages and communities to build the Warka."

In all, it costs about $500 to set up a tower—less than a quarter of the cost of something like the Gates toilet, which costs about $2,200 to install and more to maintain. If the tower is mass produced, the price would be even lower, Vittori says. His team hopes to install two Warka Towers in Ethiopia by next year and is currently searching for investors who may be interested in scaling the water harvesting technology across the region.

"It's not just illnesses that we're trying to address. Many Ethiopian children from rural villages spend several hours every day to fetch water, time they could invest for more productive activities and education," he says. "If we can give people something that lets them be more independent, they can free themselves from this cycle."

A Giant Basket That Uses Condensation to Gather Drinking Water
BY JOSEPH FLAHERTY 03.28.14

Designer Arturo Vittori believes the solution to the Ethiopian water shortage lies not in high technology, but in sculptures that look like giant-sized objects from the pages of a Pier 1 catalog. ARCHITECTURE AND VISION

Around the world, 768 million people don’t have access to safe water, and every day 1,400 children under the age of five die from water-based diseases. Designer Arturo Vittori believes the solution to this catastrophe lies not in high technology, but in sculptures that look like giant-sized objects from the pages of a Pier 1 catalog.

His stunning water towers stand nearly 30 feet tall and can collect over 25 gallons of potable water per day by harvesting atmospheric water vapor. Called WarkaWater towers, each pillar is comprised of two sections: a semi-rigid exoskeleton built by tying stalks of juncus or bamboo together and an internal plastic mesh, reminiscent of the bags oranges come in. The nylon and polypropylene fibers act as a scaffold for condensation, and as the droplets of dew form, they follow the mesh into a basin at the base of the structure.


“WarkaWater is designed to provide clean water as well as ensure long-term environmental, financial and social sustainability,” says designer Arturo Vittori. Photo: Gabriele Rigon
Vittori decided to devote his attention to this problem after visiting northeastern Ethiopia and seeing the plight of remote villagers first hand. “There, people live in a beautiful natural environment but often without running water, electricity, a toilet or a shower,” he says. To survive, women and their children walk for miles to worm-filled ponds contaminated with human waste, collect water in trashed plastic containers or dried gourds, and carry the heavy containers on treacherous roads back to their homes. This process takes hours and endangers the children by exposing them to dangerous illnesses and taking them away from school, ensuring that a cycle of poverty repeats.

Exposure to this horrific scene motivated Vittori to take action. “WarkaWater is designed to provide clean water as well as ensure long-term environmental, financial and social sustainability,” he says. “Once locals have the necessary know how, they will be able to teach others villages and communities to build the WarkaWater towers.” Each tower costs approximately $550 and can be built in under a week with a four-person team and locally available materials.

A more obvious solution to a water shortage would be digging a well, but drilling 1,500 feet into Ethiopia’s rocky plateaus is expensive. Even when a well is dug, maintaining pumps and ensuring a reliable electrical connection makes the proposition unlikely.


Though the structure is made from organic material, Vittori designed it using traditional CAD tools. Image: Arturo Vittori

Instead of looking to Western technology for a solution, Vittori was inspired by the Warka tree, a giant, gravity-defying domed tree native to Ethiopia that sprouts figs and is used as a community gathering space. “To make people independent, especially in such a rural context it’s synonymous of a sustainable project and guaranties the longevity,” says Vittori. “Using natural fibers helps the tower to be integrated with the landscape both visually with the natural context as well as with local traditional techniques.”

The design has been two years in the making and though the final product is handcrafted, Vittori has used the same parametric modeling skills honed working on aircraft interiors and solar powered cars to create a solution that is safe and stunning. The 88-pound sculpture is 26-feet wide at its broadest point but swoops dramatically to just a few feet across at its smallest point. Vittori and his team have tested the design in multiple locations and worked in improvements that increase the frame’s stability while simultaneously making it easy for villagers to clean the internal mesh.

Vittori hopes to have two WarkaTowers erected in Ethiopia by 2015 and is looking for financial rainmakers who’d like to seed these tree-inspired structures across the country.