News / Africa

    Wastewater Key to Sustaining Life

    In this photo taken on April 21, 2012, local residents line up to fetch drinking water from a lake in Rangoon, Burma. (AP Photo)In this photo taken on April 21, 2012, local residents line up to fetch drinking water from a lake in Rangoon, Burma. (AP Photo)
    x
    In this photo taken on April 21, 2012, local residents line up to fetch drinking water from a lake in Rangoon, Burma. (AP Photo)
    In this photo taken on April 21, 2012, local residents line up to fetch drinking water from a lake in Rangoon, Burma. (AP Photo)
    Joe DeCapua
    The world population is growing rapidly and is expected to reach 9 billion by 2050. While efforts are underway to ensure there’s enough food, one scientist is warning there may not be enough water.



    Professor Stanley Grant said billions of people don’t have adequate water supplies. That number will only get bigger, he says, unless something is done immediately.

    “There are drought conditions across the U.S. and in many parts of the world. So as our planet gets warmer we need more fresh water and as populations grow we also end up using more fresh water. So that’s kind of the big picture backdrop,” he said.

    Grant is a professor of environmental engineering at the University of California at Irvine. He’s the author of a new study called Taking the Waste out of Wastewater for Human Water Security and Ecosystem Sustainability.

    “The focus of this particular paper is really on moving toward a paradigm shift away from where we really have been for years, which is just simply trying to get more sources of water all the time. And that’s kind of a flawed approach. Eventually you run out of new sources of water. You can’t tap into rivers that are already dry. You have to come up with a new approach. And the new approach really is focused around improving the productivity of the water that you already have. And that means basically getting more value out of that water,” he said.

    Water is essential for life, which is why it’s at the heart of tensions in many regions. For example, many countries draw water from the Nile River and there’s often disagreement over how much each should get.

    “The Nile is an interesting example. It’s one of a number of examples. Colorado River in the United States, the Yellow River in China would be other examples. These major rivers have been tapped out so much that basically they’re dry by the time they get to their deltas,” he said.

    Grant said important ecosystems that rely on those and other rivers could be destroyed and people downstream won’t have enough water.

    He added limited fresh water supplies make recycling wastewater and sewage effluent necessary.

    “That can involve using highly treated wastewater for activities where you don’t need really high quality water, like landscape irrigation, for example. Or it can involve using super advanced methods to treat the water to sometimes better than potable standards and actually drinking it,” he said.

    It’s already being done in some places.

    “Israel is kind of leading the world in terms of using recycled wastewater for agricultural purposes. In Singapore, for example, wastewater recycling is being used to provide water for industrial applications. In the U.S. we have a couple of wastewater reclamation facilities. For example, the Orange County water District in Orange County near where I live is recycling wastewater using very advanced techniques. And then essentially infiltrating it into the groundwater basin here and that groundwater eventually is extracted and put back in the potable water supplies,” he said.

    Residents of Melbourne, Australia have also begun to conserve and recycle water as a result of a prolonged drought. Stanley says much of the world should be doing the same.

    “If the trajectories for global climate change continue as they appear to be headed, we could see in our lifetime some really tragic situations where, for example, megacities essentially run out of water and have to be abandoned. That almost happened in Chennai, India a couple of years ago where there was a prolonged drought and at some point water wasn’t coming out of taps and there was no ground water to be had. And the city planners had to begin think about drawing up plans for evacuating the city,” he said.

    The University of California professor added that megacities that are expected to emerge in coming years, in Africa for example, could face similar problems. Grant says the technology exists to recycle and treat wastewater. However, the big hurdle will be to convince Western nations that such water can taste good.

    You May Like

    Top US General: Turkish Media Report ‘Absurd'

    General Dunford rejects ‘irresponsible' claims of coup involvement by former four-star Army General Campbell, who led NATO forces in Afghanistan before retiring earlier this year

    Video Saving Ethiopian Children Thought to Be Cursed

    'Omo Child' looks at efforts of one African man to stop killings of ‘mingi’ children

    Protests Over Western Troops Threaten Libyan 'Unity' Government

    Fears mount that Islamist foes of ‘unity' government plan to declare a revolutionaries' council in Tripoli

    By the Numbers

    Featured Videos

    Your JavaScript is turned off or you have an old version of Adobe's Flash Player. Get the latest Flash player.
    London’s Financial Crown at Risk as Rivals Eye Brexit Opportunitiesi
    X
    VOA News
    July 25, 2016 5:09 PM
    By most measures, London rivals New York as the only true global financial center. But Britain’s vote to leave the European Union – so-called ‘Brexit’ – means the city could lose its right to sell services tariff-free across the bloc, risking its position as Europe’s financial headquarters. Already some banks have said they may shift operations to the mainland. Henry Ridgwell reports from London.
    Video

    Video London’s Financial Crown at Risk as Rivals Eye Brexit Opportunities

    By most measures, London rivals New York as the only true global financial center. But Britain’s vote to leave the European Union – so-called ‘Brexit’ – means the city could lose its right to sell services tariff-free across the bloc, risking its position as Europe’s financial headquarters. Already some banks have said they may shift operations to the mainland. Henry Ridgwell reports from London.
    Video

    Video Recycling Lifeline for Lebanon’s Last Glassblowers

    In a small Lebanese coastal town, one family is preserving a craft that stretches back millennia. The art of glass blowing was developed by Phoenicians in the region, and the Khalifehs say they are the only ones keeping the skill alive in Lebanon. But despite teaming up with an eco-entrepreneur and receiving an unexpected boost from the country’s recent trash crisis the future remains uncertain. John Owens reports from Sarafand.
    Video

    Video Migrants Continue to Risk Lives Crossing US Border from Mexico

    In his speech Thursday before the Republican National Convention, the party’s presidential candidate, Donald Trump, reiterated his proposal to build a wall along the U.S.-Mexico border if elected. Polls show a large percentage of Americans support better control of the nation's southwestern border, but as VOA’s Greg Flakus reports from the border town of Nogales in the Mexican state of Sonora, the situation faced by people trying to cross the border is already daunting.
    Video

    Video In State of Emergency, Turkey’s Erdogan Focuses on Spiritual Movement

    The state of emergency that Turkish President Recep Tayyip Erdogan has declared is giving him even more power to expand a purge that has seen an estimated 60,000 people either arrested or suspended from their jobs. VOA Europe correspondent Luis Ramirez reports from Istanbul.
    Video

    Video Calm the Waters: US Doubles Down Diplomatic Efforts in ASEAN Meetings

    The United States is redoubling diplomatic efforts and looking to upcoming regional meetings to calm the waters after an international tribunal invalidated the legal basis of Beijing's extensive claims in the South China Sea. VOA State Department correspondent Nike Ching has the story.
    Video

    Video Four Brother Goats Arrive in Brooklyn on a Mission

    While it's unusual to see farm animals in cities, it's become familiar for residents of Brooklyn, New York, to see a little herd of goats. Unlike gas-powered mowing equipment, goats remove invasive weeds quietly and without adding more pollution to the air. As Faiza Elmasry tells us, this is a pilot program and if it proves to be successful, the goat gardener program will be extended to other areas of New York. Faith Lapidus narrates.
    Video

    Video Scientists in Poland Race to Save Honeybees

    Honeybees are in danger worldwide. Causes of what's known as colony collapse disorder range from pesticides and loss of habitat to infections. But scientists in Poland say they are on track to finding a cure for one of the diseases. VOA’s George Putic reports.
    Video

    Video Wall Already Runs Along Parts of US-Mexico Border

    The Republican Party’s presidential nominee, Donald Trump, gained the support of many voters by saying he would build a wall to keep undocumented immigrants and drugs from coming across the border from Mexico. Critics have called his idea impractical and offensive to Mexico, while supporters say such a bold approach is needed to control the border. VOA’s Greg Flakus has more from the border town of Nogales, Arizona.
    Video

    Video New HIV Tests Emphasize Rapid Results

    As the global fight against AIDS intensifies, activists have placed increasing importance on getting people to know their HIV status. Some companies are developing new HIV testing methods designed to be quick, easy and accurate. Thuso Khumalo looks at the latest methods, presented at the International AIDS conference in Durban, South Africa.
    Video

    Video African Youth with HIV Urge More Support

    HIV, the virus that causes AIDS, is the top killer of teens in sub-Saharan Africa. But many youths say their experience with the virus is unique and needs to be addressed differently than the adult epidemic. VOA South African Correspondent Anita Powell reports.
    Video

    Video Pop-Up Art Comes to Your Living Room, Backyard and Elsewhere

    Around the world, independent artists and musicians wrestle with a common problem: where to exhibit or perform? Traditional spaces such as museums and galleries are reserved for bigger names, and renting a space is not feasible for many. Enter ArtsUp, which connects artists with venue owners. Whether it’s a living room, restaurant, office or even a boat, pop-up events are bringing music and art to unexpected places. Tina Trinh has more.
    Video

    Video Scotland’s Booming Whisky Industry Fears Brexit Hangover

    After Britain’s vote to leave the European Union, Scotland’s government wants to break away from the United Kingdom – fearing the nation’s exports are at risk. Among the biggest of these is whisky. Henry Ridgwell reports on a time of turmoil for those involved in the ancient art of distilling Scotland’s most famous product.

    Special Report

    Adrift The Invisible African Diaspora