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Integrating enhanced biological phosphorus removal in adsorption-stage to treat real domestic sewage.

Haichao LuoBo YanChuanming XingWanqian Guo
Published in: Bioresource technology (2024)
Wastewater treatment innovation toward resource recovery facilities raises concerns about the adsorption and bio-degradation (A-B) process. This study integrated enhanced biological phosphorus removal (EBPR) into the A-stage for real domestic sewage treatment using the short sludge retention time (S-SRT) approach. The S-SRT approach resulted in outstanding phosphorus (over 90 %) and COD removal (approximately 88 %), increased sludge yield and organic matter content, and a 1.68-fold increase in energy recovery efficiency by sludge anaerobic digestion. The inhibition of nitrification relieved competition for carbon sources between denitrification and phosphorus removal, allowing for the enrichment of phosphorus-accumulating organisms (PAOs) such as Tetrasphaera and Halomonas, leading to enhanced phosphorus removal activities. Biological adsorption also plays a significant role in achieving steady phosphorus removal performance. This study demonstrates the potential of the S-SRT approach as an effective strategy for simultaneous carbon and phosphorus capture in the A-stage, contributing to energy and nutrient recovery from sewage.
Keyphrases
  • sewage sludge
  • wastewater treatment
  • anaerobic digestion
  • antibiotic resistance genes
  • microbial community
  • heavy metals
  • municipal solid waste
  • organic matter
  • risk assessment
  • climate change
  • human health