Energy efficiency & water management: a World Waternet case study

During the COP 29 conference, we had the opportunity to showcase three initiatives that prove carbon neutrality is not only possible, but also empowering in fostering water cycles. From reducing operational costs, to bolstering autonomy and efficiency, the integration of renewable energy is crucial in our projects. Here is how renewable energy is changing our projects in Kenya and the Palestinian Territories.

Water and energy: a powerful yet challenging connection 

Water and energy are inextricably linked, with every stage of the water cycle —from extraction and distribution to treatment and disposal —relying heavily on energy. Unfortunately, the energy sector remains the largest source of global greenhouse gas (GHG) emissions, releasing an alarming 15.1 gigatonnes of CO2 annually (You are leaving this website). Compounding this, water systems contribute to climate challenges by emitting potent GHGs like methane and nitrous oxide during the treatment processes.  

To address these challenges, we must embrace bold and innovative solutions. By integrating renewable energy sources like solar and hydroelectric power and enhancing energy efficiency across water systems, we can cut emissions while building resilience. That is why, we work diligently to implement the most effective solutions in our projects, not only to provide immediate relief to water challenges, but also to build resilient systems that can go the distance, efficiently, sustainably and equitably. 

Nairobi Water Energy Assessment: empowering resilience with renewable energy 

  Nairobi Water Energy Assesment visit at the Kabete Treatment Plant

As part of the WaterWorX Project, World Waternet partnered with Nairobi City Water and Sewerage Company to conduct an in-depth energy audit. Our mission? To explore how sustainable energy sources could revolutionise water management in Nairobi. The audit led to three detailed business cases for facilities in Gigiri, Kabete, and Sasumua, highlighting potential energy savings of 4.14 million KWh annually. 

What does this mean in real terms? A remarkable reduction of 15% in operational energy costs, saving 80 million Kenyan shillings every year. Beyond the numbers, renewable energy promises energy independence, shielding critical services from frequent disruptions and power failures. Excitingly, early research into the hydroelectric potential of Thika Dam and Kigoro reveals even more opportunities. With the assessment complete, action is on the horizon —one of the solutions will be implemented next year, so stay tuned! 

Transforming Salfit’s wastewater treatment with solar power 

In the Salfit region (Palestinian Territories), renewable energy is driving transformation in water management. The Salfit Wastewater Treatment Plant, serving 15,000 residents and processing 13,000 cubic metres of water daily, is now fully powered by solar panels. 

This shift is a game changer. Wastewater treatment is energy-intensive, but the plant’s solar panels not only reduce its carbon footprint, but also make it energy independent. What’s more, the surplus green energy generated meets the needs of 100 households, benefiting the entire community. This is a prime example of how renewable energy delivers far-reaching, sustainable impacts beyond water treatment.

The Blue Elephant: a compact solution for sustainable water cycles

In the Palestinian Territories, the Blu-Elephant is showcasing what’s possible with innovation and renewable energy. This membrane bioreactor, developed through a Private Public Partnership, combines activated sludge with advanced filtration to produce water nearly at drinking quality. Its compact design (just 2 square metres!) allows it to treat 5 to 6 cubic metres of water daily, meeting the needs of 50 people. 

Completely powered by solar energy, the BluElephant is a climate-neutral marvel. Its impact goes beyond water purification, —treated water is used to recharge aquifers, supply wells, and irrigate crops. This not only reduces strain on local water systems but also supports a healthier and more sustainable water cycle in a critical situation. 

Scaling up climate action: building resilient water systems globally 

The successes in Nairobi and the Palestinian territories demonstrate the tangible impact of integrating renewable energy into water management. As part of our Impact Plan 2030, we are determined to further align all our Water Operators’ Partnerships with Sustainable Development Goal 13 (Climate Action). By continuing to prioritise innovation and sustainable practices, we aim to scale these solutions and strengthen the resilience of water systems worldwide. This is how we ensure our projects deliver meaningful, lasting change for communities and the environment.