For the last six years, a power plant in San Luis Potosi, Mexico has bought water from a nearby wastewater treatment plant to use in its cooling towers (instead of using freshwater). This operation, Project Tenorio, a public-private partnership, continues today and has already resulted in the reduction of groundwater extraction of at least 48 million cubic meters (equivalent to 19,000 Olympic size pools) and increased aquifer sustainability.
This is a good example of the water and energy nexus in practice: the wastewater treatment plant covers almost all of its operating costs from this additional revenue stream and the power plant gets a more reliable water source that is also 33% cheaper than groundwater in that area.
Treated wastewater has been used to reduce the water requirements of power plants in several other countries as well, as water supply becomes more variable or disappears. In the US, for example, around 50 power plants are using treated wastewater for cooling in order to adapt to water shortages. However, innovative integrated approaches like these are still more of an exception than the norm.
While recently touring drought-stricken California, President Obama remarked: "We can't think of this simply as a zero-sum game. It can't just be a matter of there's going to be less and less water so I'm going to grab more and more..."
In his State of the State address, California’s Governor, Jerry Brown, declared a drought emergency. He suggested: “Among all our uncertainties, weather is one of the most basic. We can’t control it. We can only live with it…We can take this drought as a stark warning of things to come.”
He further emphasized the need to conserve water, expand storage, rethink water rules, invest in drinking water protection, and rethink the amount of state water each sector receives.
But, how can California move away from existing rules, expectations, and legacies that include multi-layered federal subsidies and senior water rights to a non-zero sum approach to resolve competing and conflicting water realties?
Jaehyang So, Manager of the Water and Sanitation Program, wrote an op-ed for The Huffington Post for World Toilet Day. In the article, Jaehyang So discusses the impact of sanitation on the world and the need to address basic human sanitation and hygiene in order to meet the Bank's twin goals: to end extreme poverty by 2030 and to boost shared prosperity for the poorest 40 percent of the population. Read the op-ed below, courtesy of The Huffington Post.
Brian Arbogast is the Director of the Water, Sanitation and Hygiene program at the Bill & Melinda Gates Foundation.
At the Water Summit held in Budapest on October 8 this year, UN Secretary-General Ban Ki-Moon called for action on the urgent issue of sanitation to underpin human dignity and health, noting that “It is plain that investment in sanitation is a down-payment on a sustainable future. Economists estimate that every dollar spent can bring a five-fold return.”
After an intense and exciting week in Stockholm for World Water Week, it is time to look back at some conclusions of the conference and the way forward for next year. I was in Stockholm as a “Lead Rapporteur” and reported in the closing plenary session on “Cooperation to achieve equity by balancing competing demands”; other teams reported on “Managing waters across borders,” “Responding to Global Change,” and “Closing the science-policy-practice loop” (see closing plenary here). This is my attempt to summarize over 100 sessions, you can find all the sessions in the WWW website.
Can the methodology that re-imagined urban water management adapt itself to meet new challenges?
Next week as thousands of practitioners gather at annual World Water Week in Sweden the focus is on cooperation, echoing the UN’s declaration of 2013 as the International Year of Water Cooperation.
Is there a model to track citizen experience of water services and present it in a ready-to-use manner for decision makers and the public? Would better articulation of citizen preferences encourage more meaningful engagement with service providers?