Performance and recovery of a completely separated partial nitritation and anammox process treating phenol-containing wastewater

Wei Wang, Chao Pang, Julian Muñoz Sierra, Zhenhu Hu, Xuesong Ren

Research output: Contribution to journalArticleScientificpeer-review

4 Citations (Scopus)

Abstract

Anammox process is considered as a promising technology for removing total nitrogen from low-strength ammonium and phenol-containing wastewater. However, it is still a challenge for the anammox process to treat high-strength ammonium and phenol-containing wastewater. A completely separated partial nitritation and anammox (CSPN/A) process was developed to remove total nitrogen from high-strength phenol-containing wastewater. About 92% of COD, 100% of phenol, and 82.4% of total nitrogen were successfully removed at a NH4 +-N concentration of 200 mg L−1 with a phenol/NH4 +-N mass ratio of 0.5 in the CSPN/A process. Furthermore, a shock loading of 300 mg phenol L−1 with a phenol/NH4 +-N mass ratio of 1.5 led to a complete failure of partial nitritation, but the performance was rapidly recovered by the increase of NH4 +-N concentration. Although the activities of ammonium-oxidizing bacteria and anammox bacteria were severely inhibited at a phenol/NH4 +-N mass ratio of 1.5, the enrichment of efficient phenol degraders in the CSPN stage could strengthen the performance robustness of partial nitritation and anammox process. Therefore, this study presented a new insight on the feasibility of the anammox process for treating high-strength ammonium and phenol-containing wastewater.

Original languageEnglish
Pages (from-to)1-10
Number of pages10
JournalEnvironmental Science and Pollution Research
DOIs
Publication statusE-pub ahead of print - 7 Jul 2018

Keywords

  • Ammonium-oxidizing bacteria
  • Anammox process
  • Partial nitritation
  • Performance robustness
  • Phenol
  • Phenol degraders

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