Good as gold: Waste in a circular economy
By Barbara Nebel and Femi Perumbally https://www.thinkstep-anz.com/ There is no waste in a circular economy, only resources and opportunities to use them to their full potential. Unlike a linear economy, a circular economy or ōhanga āmiomio, proposes a model in which economic growth is not connected to an increased use of limited, natural resources. Instead, growth in a circular economy relies on designing products and systems for longevity in their first life and recyclability and reusability for consequent lives. Therefore, we can keep resources in use for as long as possible and reduce the demand for raw (virgin) material — getting the most value out of existing materials and reducing the costs of material extraction methods in the process. However, we currently live in a linear economy with a take-make-dispose model in which waste is inevitable. While there is still a way to go before we reach a truly circular economy, some businesses are leading the transition with innovative approaches to create value with waste-based products. From galvanising to paint to IT equipment waste, we look at some of the local businesses creating golden opportunities with waste. Zincovery — Creating a waste free industry The galvanised steel industry produces a waste acid with a high concentration of zinc — an eco-toxin that is essential for humans in trace amounts but toxic to aquatic life. Generally, this is disposed of via wastewater and landfill after treatment. However, this results in the loss of zinc, a useful mineral, and its incomplete removal from wastewater degrades most sewage treatment processes and causes environmental damage to waterways. Zincovery tackles these issues by taking the waste acid and recycling it while also recovering zinc. While extracting valuable materials from waste is certainly circular economy friendly, it does not necessarily have to be climate friendly. Zincovery […]