Enhancing phosphorus release from waste activated sludge by combining high-voltage pulsed discharge pretreatment with anaerobic fermentation

Peishan Hu, Jianyong Liu, Hongxu Bao, Liang Wu, Lei Jiang, Lianpei Zou, Yajun Wu, Guangren Qian, Yu You Li

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

The effect of high-voltage pulsed discharge (HVPD) pretreatment on waste activated sludge (WAS) for phosphorus (P) release enhancement via anaerobic fermentation (AF) was studied. Batch tests were performed to investigate the P release via HVPD pretreatment and AF. The P release could be enhanced by a 26.7% soluble ortho-P [SOP(L)] concentration increase via HVPD + AF compared with the control sample (AF of WAS without pretreatment). The HVPD and AF contributed 42.2% and 57.8% to the total SOP(L) increase, respectively. The P speciation analyzed using the Standards, Measurements, and Testing extraction protocol indicates that the decrease of non-apatite inorganic P (NAIP) in the solid phase is consistent with the increase of SOP(L) in the liquid phase and the release of poly-P from WAS could be enhanced due to the destruction of sludge flocs by HVPD. In addition, removal rates of 23.8% of total suspended solids (TSS) and 34.3% of volatile suspended solids (VSS) were calculated for the HVPD-pretreated solid phase, which suggests that the soluble organics production and WAS reduction were also enhanced via HVPD + AF. The results reveal that HVPD pretreatment is a promising method for the recovery of P from WAS and WAS reduction.

Original languageEnglish
Pages (from-to)1044-1051
Number of pages8
JournalJournal of Cleaner Production
Volume196
DOIs
Publication statusPublished - 2018 Sep 20

Keywords

  • Anaerobic fermentation
  • High-voltage pulsed discharge
  • Phosphorus release
  • Waste activated sludge

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Environmental Science(all)
  • Strategy and Management
  • Industrial and Manufacturing Engineering

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