The renewable energy hidden in our wastewater ponds – here’s how it could work

Abstract

New Zealand is confronting a perfect storm. Its energy grid faces three pressing challenges at once: an unreliable electricity supply, strict emissions reduction targets and ongoing environmental issues related to wastewater ponds. As the country prepares to meet growing energy demands, the variability of wind, solar and hydroelectric power has made year-round electricity generation hard to ensure. Compounding the issue are New Zealand’s emissions targets and avoidable emissions from wastewater treatment plants. We need immediate, practical solutions. One lies hidden within our wastewater systems.