| Title | From liquid waste to mineral fertilizer: Recovery, recycle and reuse of high-value macro-nutrients from landfill leachate to contribute to circular economy, food security, and carbon neutrality |
|---|---|
| ID_Doc | 6018 |
| Authors | Kurniawan, TA; Othman, MHD; Liang, X; Goh, HH; Chew, KW |
| Title | From liquid waste to mineral fertilizer: Recovery, recycle and reuse of high-value macro-nutrients from landfill leachate to contribute to circular economy, food security, and carbon neutrality |
| Year | 2023 |
| Published | |
| Abstract | As nutrients shortage that will occur by the next decade could limit global fertilizer production, there are growing needs to recover macro-nutrients such as P and N from landfill leachate, which its generation and treatment have become global environmental issues. This work critically reviews the applicability and the performance of physico-chemical treatments for nutrient recovery from landfill leachate. This article also identifies recent progress and bottlenecks of nutrient recovery from landfill leachate, while providing an overview of how to apply a circular economy paradigm in the nexus of water-food-energy. Due to their ability to recover P and N from landfill leachate, specific attention is given to struvite precipitation, adsorption, and ammonium stripping. Their technological strengths and bottlenecks of each technique are evaluated based on a literature survey of 145 papers (1981-2022). By integrating anaerobic digestion and other nutrient recovery technologies, it is possible for water utilities to provide both renewable energy and nutrients, while contributing to a circular economy, global food security, and carbon neutrality. To attain a sustainable landfill management, the selection of appropriate technology for nutrient recovery from the liquid waste needs to consider the properties of waste stream, recovery performance, discharge standard, impacts, and cost-effectiveness. Overall, this work has consolidated new knowledge between technological development and demand-driven valorization. |
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