Over the past 12 months, the world has seen water in its extremes. In the same year, the City of Cape Town, announced “day zero,” the day on which it was predicted the city would run dry, and a million victims of massive flooding were evacuated from Kerala, India. Floods, droughts, infrastructure shortfalls, poor quality and poor water resources management all made global headlines. Countries are facing a new normal where water is either “too much, too little, or too polluted.”
What do Yucatan (Mexico), Michoacan (Mexico), Karur (India), and Jan Kempdorp (South Africa) have in common? These are all places with successful stories of implementing Anaerobic Digestion (AD) for wastewater treatment. But what is AD? What are the benefits?
AD systems are installed for many different purposes, such as a waste treatment step, a means to reduce odours, a source of additional revenues, or a way to improve public image. The AD treats water and waste, reducing adverse environmental impacts. Through AD, two main by-products can be obtained: biogas—that can be used as a fuel, and sludge—that can be used as a soil amender for improve crops. These AD “by-products” are important in the context of mitigating the impacts of climate change, where environmental co-benefits come from efficient use of “by-products”. For instance, livestock enteric fermentation, livestock waste management, rice cultivation, and agricultural waste burning are all sources of methane emissions, representing between 7 and 10 percent of global methane emissions. AD not only treats water through an environmentally sustainable approach, but also contributes to produce high rates of methane for recovery and further utilization.
About 5 years ago we embarked on a global initiative titled “Thirsty Energy” to respond to water-energy nexus challenges around the world. The initiative, a joint effort of the Water and the Energy Global Practices at the World Bank, has finally come to an end. We wanted to reflect on the lessons learnt along the way, as our team has developed a fantastic set of material and methodologies to move the needle forward on this issue. We hope that the global community takes advantage of this to ignite change.
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The 8th World Water Forum was held in Brazil a few days ago. What's ironic is that the more than nine thousand of us attending this Forum were discussing water-related issues in a city of three million grappling with a severe water shortage. After checking in at my hotel, the first thing I found in my room was a notice from the Government informing guests of this crisis and recommending ways to reduce water use. We recently learned of the predicament in Cape Town, South Africa, which was on the verge of running out of this essential liquid—a plight facing many cities around the world.
Les systèmes de prépaiement peuvent-ils élargir l’accès aux services de l’eau aux populations défavorisées des villes et centres urbains d’Afrique ? Peuvent-ils en améliorer la qualité ? Cette solution peut-elle au contraire interdire aux plus pauvres un plus large accès à l’eau ? Les systèmes de prépaiement sont-ils trop coûteux, imposent-ils de nouvelles contraintes sur le plan technique, social et de l'accessibilité des prestataires de service qui peinent déjà à répondre à une demande en eau croissante ? Et qu’en pensent les usagers ?
Can prepaid systems become an instrument to improve access and quality of water services to poor people in African cities and towns? Or does prepayment deny poor people more access to water? Do prepaid systems cost too much and impose more technical, affordability and social pressure on service providers already struggling to cope with growing demand? And what do customers think?
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