Tag Archives: water

Why Singapore won’t be going thirsty

TakePart/Participant Media | Nov. 5, 2015

Singapore's Marina Barrage reservoir

Singapore’s Marina Barrage reservoir. Photo credit: Public Utility Board, Singapore

In just 10 years, two out of three people will be living in a country that’s struggling to meet demand for water, according to the United Nations. But even though Singapore has no aquifers or lakes, it’s unlikely that nation’s 5.5 million residents will be among the world’s thirsty.

That’s because the small island nation, which consumes 400 million gallons daily, has a water strategy that is arguably one of the most successful in the world.

“We have four national taps,” George Madhavan, the spokesperson for Public Utility Board, Singapore’s government agency in charge of water quality, conservation, and supply, said during a recent Meeting of the Minds urban-sustainability conference in California.

The “taps” flow from desalinated seawater, recycled wastewater, water collected from rainfall, and an imported supply from neighboring Malaysia.

Having a reliable source of water has always been on the government’s agenda, Madhavan said.

“Without secure and reliable access to water in Singapore, business will not come,” he said. “So that’s a top priority to get a bigger piece of the pie.”

The push to develop a mostly self-sufficient water supply has been credited to Lee Kuan Kew, the country’s first prime minister, who took on the task in response to water shortages in the 1960s and ’70s.

It wasn’t a quick fix. It took 30 years to put the system in place.

Singapore NEWater visitor museum

The NEWater visitor museum in Singapore. (Photo credit: Public Utility Board, Singapore)

The PUB water agency says its “jewel” is the ability to recycle used water, or wastewater from sinks and toilets, into what it calls NEWater. The NEWater purification process, which Singapore launched in 2003 (after getting tips from the Orange County Water District’s wastewater-recycling plant in Southern California), meets 30 percent of daily water demand. While the recycled water is mainly used for industrial purposes, it also replenishes the country’s 17 reservoirs.

Recycled water can also supply water for drinking and cooking. According to PUB, NEWater has passed 130,000 scientific tests and exceeds the drinking water standards set by the U.S. Environmental Protection Agency and guidelines issued by the World Health Organization.

Here’s what happens: The wastewater travels through a network of deep tunnel sewer pipes, then goes through conventional treatment at a sewage treatment plant. It’s then either returned to the sea or sent to one of the country’s four NEWater plants for further purification, depending on demand.

The NEWater plants follow a three-step process. First, membranes filter out small particles such as solids and bacteria. Next, reverse osmosis takes out larger contaminants. Last, the water is disinfected with ultraviolet light and hydrogen peroxide.

But Madhavan said the government knew a large part of successfully integrating recycled wastewater to its supply hinged on whether Singaporeans would want to drink it in the first place.

“The difficult part isn’t the technology,” he said. “It’s getting the community to embrace recycled water.”

NEWater

Bottles of NEWater filled with Singapore’s purified wastewater. (Photo credit: Public Utility Board, Singapore)

To do that, the country had to get rid of the “yuck” factor. For its NEWater branding campaign, it bottled the recycled water with a label featuring a cartoon water drop with a gigantic grin—and constructed a slick visitor center showing how the purification process works via games and interactive exhibits. The water agency also brought reporters to the Orange County Water District’s water-recycling plant, as well as to one in Scottsdale, Arizona.

Another quarter of Singapore’s daily demand is met by its two desalinization plants, which together can process 100 million gallons a day. Because the plants are energy-intensive, the country is experimenting with electrodeionization, a process that consumes less power.

The third tap comes from rainwater collected from drains, canals, rivers, and storm water collection ponds. (Residents aren’t allowed to harvest water without the government’s permission.) In combination with water imports from Malaysia, the rainwater fulfills the remaining 45 percent of Singapore’s daily water needs.

PUB is preparing for a projected doubling in demand by 2060. (Singapore’s water agreement with Malaysia is set to expire in 2061.) The agency says it’s on track to triple its NEWater production and build two new desalinization plants that together will meet 80 percent of demand in 2060.

Madhavan said Singapore thinks about water in a different way.

“You don’t want to drain it—you want to collect it,” he said.

 

Coal barge sinks in world’s largest mangrove forest

TakePart/Participant Media | Oct. 30, 2015

Sundarbans mangrove forest in Bangladesh

The mangrove forest in Bangladesh’s portion of the Sundarbans. (Photo credit: Amio James Ascension/courtesy of Creative Commons)

A cargo barge carrying 570 tons of coal in Bangladesh has sunk in the world’s largest mangrove forest.

The Sundarbans, a UNESCO World Heritage Site, is home to endangered species such as the Bengal tiger, the Irrawaddy and Ganges dolphins, sea turtles, and the estuarine crocodile.

Tuesday night’s incident, which took place on the Poshur River, is the third spill in a year in the Sundarbans, which straddles the border with India. Last December, a ship spilled nearly 93,000 gallons of oil into a river in the Sundarbans after colliding with a cargo vessel, an incident that the Bangladeshi government called an ecological catastrophe. In May, a cargo loaded with fertilizer capsized in another river in the Sundarbans.

“In a worst-case scenario, it can cause fish kills and impact endangered fish species,” Donna Lisenby, a staffer with the international environmental organization Waterkeeper Alliance, said of the coal spill. “When a ship or barge loaded with coal sinks, it has big diesel fuel tanks that power the engines, batteries containing lead acid, and hydraulic fluids that all go underwater.”

She noted that coal contains heavy metals such as arsenic, cadmium, chromium, lead, and mercury that can contaminate the river.

Local news outlets have reported that the ship’s captain and nine sailors were rescued.

Lisenby said local Waterkeeper affiliates who arrived at the scene the morning after the incident told her they did not witness any action taken by the Bangladeshi government or by the company that owns the ship.

“They were there throughout most of the day on Wednesday and didn’t see any buoys or lights to warn other vessels where the ship had sunk,” she said. “They didn’t see any cleanup or any oil response vessels either.”

One media outlet has reported that the government has formed a committee to investigate what happened and assess the incident’s impact on the mangrove forest.

It’s not clear what caused the ship to sink.

Lisenby said the incident underscores the need to fight the Bangladeshi government’s plans to build a 1,320-megawatt coal-fired power plant at the edge of the Sundarbans.

“If the proposed Rampal coal plant is not stopped, it will result in an exponential increase in coal barge traffic through the Sundarbans,” Sharif Jamil, a leader of BAPA, Bangladesh’s largest environmental organization, said in a statement. “This incident shows that current safety precautions governing boat traffic through the Sundarbans are not sufficient to prevent accidents that put tons of fossil fuel pollutants in the water.”

Lisenby, who visited the Sundarbans in May, said that more than 4.7 million tons of coal needed to fuel the power plant annually would have to be transferred by hand from large barges to smaller boats, because the rivers leading north to the proposed project site are too shallow to handle larger vessels.

Bangladesh, which signed an agreement with the Indian government to build the power plant three years ago, released an environmental impact assessment for the project in 2013. Lisenby said that although the assessment contained more than 30 issues that needed to be addressed, the government has moved forward with the project.

Three companies submitted bids for the power plant’s construction. Last month, the Bangladeshi government told the Dhaka Tribune that it plans to award the contract in January 2016.

Waterkeeper Alliance wants UNESCO to place Sundarbans on the list of endangered World Heritage Sites.

“The government responsible for protecting it isn’t doing its job,” Lisenby said.

Drought dowsing goes hi-tech

California Magazine | Aug. 11, 2014

Wellntel pilot

Wellntel is conducting its first pilot with farmers and residents in the drought-stricken town of Templeton, Calif. Photo credit: Wellntel

This year, groundwater is serving as California’s pinch hitter, supplying about 60 percent of the state’s needs during this historic drought. But until now, it’s been an impossible resource to manage.

We don’t have enough data to know just how much groundwater is hanging out below any given house or farm. Because it’s unregulated by the state, anyone can pump as much water as they want—a point of contention between those who think people own the water underneath their property and those who believe groundwater is a communal resource. To make matters worse, groundwater hasn’t been replenished during these dry times, and there’s been a recent rush to drill more wells in the San Joaquin Valley.

But while we can’t make it rain on California, nor force the legislature to pass two bills currently being considered that would mandate local governments to regulate their groundwater, new technology is allowing us to better “see”  the water beneath the ground and could help us make smarter decisions about how best to use it.

A recently developed sensor-based device that measures groundwater is helping UC Berkeley researchers understand just how much of this resource we’ll have in the coming decades. Developed by Wisconsin-based startup Wellntel, the product attaches to the top of a well and uses sonar to measure water levels and a well’s pumping rate every 30 minutes, then sends the data to the computing cloud, allowing researchers to make use of it.

In the last few months, geography department professor Norman Miller and recent Ph.D. graduate Raj Singh have started incorporating data from the devices into the computer-based groundwater model they’ve been developing for the last four years. “One of the big problems I see is the availability of water due to land use stressors under climate change,” says Miller, a hydrometeorologist. “So one of the outstanding questions is how much (groundwater) is left on planet, who’s using it, and when. But there’s a lot of water that we can’t see.”

The current problem, the researchers say, is that while satellite data can show how much groundwater there is on a regional level—in the Central Valley, for instance—it can’t capture how much there is under a city, or at the farm level. There just isn’t enough data from U.S. wells to get a deep understanding of how groundwater flows. The predominant techniques used to measure well water levels—measuring tapes or pressure sensors—are labor-intensive and costly. The U.S. Geological Survey monitors less than 10 percent of its 20,000 wells, California’s Department of Water Resources monitors a few hundred.

But by integrating the Wellntel data into their current model, the Cal researchers believe they can provide a deeper understanding of how much groundwater we have now, and how much we’ll have in the future as climate change takes its toll.

“It’s like moving from a black-and-white to an HD television,” Singh says of the difference in resolution—which with the new data has advanced from gathering data at the 10-20 kilometer level down to a 100-meter level. At that resolution, he says it’s possible to discern the land’s topography and groundwater level differences from houses a few blocks apart.

With this knowledge, farmers and landowners could be better equipped to allocate their consumption, plan their growing seasons and save for dry times—not unlike the way we manage our bank accounts.

Wellntel is partnering with Miller and Singh on a pilot research project in Templeton, a town just outside Paso Robles on California’s Central Coast. The area has sprouted a number of vineyards and hobby farms in recent decades after its almond groves turned fallow.

“There’s been a huge increase in vineyard development in Paso Robles, and many residents saw dramatic declines in their water levels and had to dig new wells because the water table dropped,” says Wellntel co-founder Nick Hayes. “And some of the new wells have had to go so deep that they have to tap into mineral and sulfur-smelling water—it’s pretty severe and it feels dire to them, and their property values are tied to water in the area.” Some even have had to truck in their water, Hayes adds.

Every two weeks, Miller and Singh receive data (stripped of any identifiers) from 12 Wellntel sensors installed every half-mile throughout the 9-square mile pilot area.

By assimilating this data into their current groundwater model, the researchers say they’ll eventually be able to predict how groundwater levels will change from season to season over the next few years, as well as over the coming decades based on a range of greenhouse gas emissions scenarios up to 2050.

Miller says it’s not clear right now just when they’ll be able to make those predictions. But the Cal researchers have met several times and shared their model with Frances Chung, the chief of the modeling branch at the state’s Department of Water Resources, and they say the state is interested in making use of the new technology. Such an ability to collect information about groundwater levels could boost the state’s pro-regulation movement.

“If you limit water it has to be based on what you know, and right now it’s extremely difficult to control and monitor,” Singh says. “But as we get more information and it becomes more scientific—and more objective based on facts—it will be easier to regulate.”

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Cloud technology brings clean drinking water to India

GreenBiz | September 4, 2013 | Original headline: How cloud technology can bring clean drinking water to India

Women and children collect drinking water from tanks at an urban resettlement slum in Delhi, India

Women and children collect drinking water from tanks at an urban resettlement slum in Delhi, India. Credit: Frog Design

Imagine not having access to clean drinking water because you refused to vote for a particular politician, or didn’t pay bribes to the driver delivering your supply. Even after doing both these things, you’re still not sure just exactly when the next delivery will arrive.

This is the case in India, where access to drinking water is not universal. As India increasingly urbanizes and water becomes even more scarce, solutions that raise access will be more important in the coming decades.

That’s why the Piramal Foundation — which addresses India’s development challenges through social ventures — funded Sarvajal, a company that uses cloud technology to provide water via filtration stations and solar-powered ATMs.

UNICEF reports that water-borne diseases such as cholera, gastroenteritis and diarrhea in India are responsible for $600 million in medical bills and lost productivity per year, but it could get worse. The national government estimates that demand for clean water will rise 50 percent by 2031 if current delivery models stay the same. According to the World Bank, 220 million Indians will migrate to cities over the same 20-year period.

The problem: Steady access to clean water

In rural areas, residents often have no other choice than to capture groundwater.  “The water was brackish, there were no pipes, no tankers, and filters were too expensive,” said Anand Shah, former head of the India-based Piramal Foundation, of the lack of access. “They’d sift it but would still have large amounts of kidney stones, joint pain, arthritis and gastrointestinal problems.” Plus, the reverse osmosis process to desalinate and filter out impurities was inefficient.

In urban slums, the situation can be better, but not optimal. Although tankers arrive to dispense water for free, they’re intermittent and unpredictable, Shah said. Residents invest large amounts of time pursuing the tanker, jostling to fill containers they carry home. And even if the driver has the best intentions, the country’s rough roads lead to unexpected roadblocks.

Through a monitoring device attached to each filtration unit, embedded sensors and an RFID reader, Sarvajal tracks water quality in real time. It follows user activity, how many times the water has been backwashed and rinsed, when filters need changing, how much water a station has dispensed and how many times the power went out.

Service and maintenance were costly, so a monitoring device was built in-house allowing the company to diagnose machines from one central location.

The company grew from one pilot location in 2007 to more than 200 filtration station-ATM combos in villages of at least 5,000 people each across India. One resident per village can purchase a franchise for about 30,000 Indian rupees, about $500, and sell the filtered water for a penny per liter, he said.

Users pre-pay for their water, and funds are loaded onto Sarvajal ATM cards.

Selling, really?

Shah said he realizes that selling water in a country that has offered water as a public resource could appear off the mark. But delivery via the tankers is unpredictable, and it takes families time to collect water from the tankers and filter it at home.

“We looked at every alternative out there, and even if a family buys the cheapest water filter, we’ve priced it still under what it would cost them per liter,” he said. Bottled water costs 32 cents and water pouches 14 cents per liter on the street, and creates more waste than refilling reusable containers.

According to Shah, local franchise owners can earn a good living — up to two to three times what they would make for unskilled labor. While Sarvajal still owns the water filtration equipment, it takes less than a year for the franchise owners to start returning profits, he says. Sarvajal, on the other hand, doesn’t expect to profit for another five to 10 years.

Shah says Sarvajal launched as a for-profit company in part because a non-profit would have a harder time attracting technical talent.

Scaling into urban areas – with some help

Sarvajal has secured the go-ahead from the local government in the metropolitan area around New Delhi to set up some 50 filtration station-ATM units — areas without regular access to drinking water.

Because Sarvajal mostly had operated in more rural areas, it needed help. To that end, the company hired Frog Design, a consultancy that engineers and designs products and services in energy, health care and social innovation.

Jan Chipchase, Frog’s creative director of global insights, set up a team of staffers from India. They spent over a month in Delhi interviewing and observing how residents navigated securing drinking water. The group also spoke to water providers who had opened businesses related to supplying clean water.

Savda Ghevra, a resettled slum on the edge of Delhi, was the focus of the research. Frog wanted to find out the value of clean drinking water, how a delivery system would meet residents’ needs and what might arise during the implementation of an alternative system. (The extended research was funded by the Institute of Money, Technology and Financial Inclusion at the University of California-Irvine).

“A water ATM allows stored value to convert to digital credit. As the world digitizes, we wanted to find out to what extent a low literate community was willing to invest in these types of technology,” said Chipchase.

Using digital tools to store value in less developed countries is not unheard of, says Chipchase, who cited Kenya as a country where much of the population banks online.

As a result of their research – detailed in a report, “Journeys for Water” released Tuesday – Frog concluded that in the context of the current water delivery model for Savda Ghevra, the “belief that water is a right and should be free is moot. In the slum residents pay for their water in one way or another – with time and money, with their ability to move and make political choices based on their interests.”

“It’s realizing that the current practice of water tankers isn’t working from a social and practical perspective,” Chipchase said. “This project is far more about understanding politics and economics in the broader sense.”

But Frog found that despite all the advanced technology enabling a water delivery system such as Sarvajal’s to exist in a country lacking adequate infrastructure, it must give residents some ownership and control for the system to be sustainable.

Shah said his team estimates that Sarvajal needs to scale to 1,000 to 1,500 locations to break even.

Democratizing of technology

Chipchase said Sarvajal is a perfect example of how “reverse innovation” is taking place through combining “mature” technologies such as the mobile telephone system, RFID tags and sensors. “The ability to prototype is becoming mainstream. It’s not just Silicon Valley anymore.”

Shah is a CalTech and Harvard-educated Indian-American who grew up in Houston, then spent 13 years in India after college, yet most of the 120 employees at Sarvajal are Indian nationals. His team of 25 engineers developed the filtration system’s monitoring device, coined the Soochak.

Coin-operated water filtration stations exist in Vietnam and Thailand. Yet Sarvajal’s pairing of cloud-based monitoring and an ATM service appears to be unique.

Capital returns should be secondary

Shah has been contacted by the Indian division of water giant Pentair and an array of venture capitalists about potential investments. But after learning more about the company’s timeline for return, he said, they lost interest. The same thing happened, he said, with larger companies interested in moving into the space themselves.

“My response to them was you’re asking the wrong question – you should be asking how long it’s going to take to solve the problem,” he said. “We’re in this to solve the problem, not for money to be made. Things like water — where innovation hasn’t happened in 50 years – these are really big opportunities to think about them freshly from a new perspective. Returning capital should be a byproduct or a secondary [outcome].”

Middle image: Women collect filtered drinking water at a solar ATM and filtration station operated by Sarvajal. Bottom image: Sarvajal’s filtration stations are operated by local villagers and are monitored for maintenance using sensor technology. All photos courtesy Frog Design

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