Enhancing phosphorus recovery from sewage sludge using anaerobic-based processes: Current status and perspectives

Bohan Yu, Xiangmin Xiao, Jianwei Wang, Meng Hong, Chao Deng, Yu You Li, Jianyong Liu

Research output: Contribution to journalReview articlepeer-review

Abstract

Anaerobic-based processes are green and sustainable technologies for phosphorus (P) recovery from sewage sludges economically and are promising in practical application. However, the P release efficiency is always not satisfied. In this paper, the P release mechanisms (regarding to different P species) from sewage sludge using anaerobic-based processes are systematically summarized. The obstacles of P release and the updated achievements of enhancing P release from sewage sludges are analyzed and discussed. It can be concluded that different P species can release from sewage sludge via different anaerobic-based processes. Extracellular polymeric substances and excessive metal ions are the two main limiting factors to P release. Acid fermentation and anaerobic fermentation with sulfate reduction could be two promising ways, with P release efficiencies of up to 64% and 63%. Based on the summarization and discussion, perspectives on practical application of P recovery from sewage sludge using anaerobic-based processes are proposed.

Original languageEnglish
Article number125899
JournalBioresource Technology
Volume341
DOIs
Publication statusPublished - 2021 Dec

Keywords

  • Acid fermentation
  • Anaerobic-based process
  • Phosphorus recovery
  • Sewage sludge
  • Sulfate reduction

ASJC Scopus subject areas

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal

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