Combination of electrolysis and microalgae cultivation for beneficial reuse ofertilizer wastewater from poultry manure anaerobic digestion effluent

Xinfeng Wang, Lu Lin, Li Zhang, Raquel de Souza, Haifeng Lu, Zhidan Liu, Na Duan, Taili Dong, Yuanhui Zhang, Baoming Li

Research output: Contribution to journalArticlepeer-review

Abstract

Poultry manure anaerobic digestion effluent (PMADE) contained a high content of ammonia nitrogen (NH4+ –N), which should be treated properly before discharge. However, the mechanism of electrolysis in treating high NH4+ –N (over 1,500 mg L–1) wastewater has never been studied. In this study, fertilizer wastewater from PMADE with high content of NH4+ –N (over 3,000 mg L–1) and low carbon/ nitrogen (C/N) ratio was treated via electrolysis and microalgae. Results showed the highest removal of NH4+ –N, total organic carbon (TOC) and inorganic carbon (IC) in electrolysis were 47%, 76%, and 93%, respectively. Quadratic functions are suitable to simulate NH4+ –N removal of FW (coefficient is over 0.95). The removal efficiency of NH4+ –N was 10%–65% during microalgae cultivation. The removal of NH4+ –N, total phosphorus (TP), IC, and TOC in fertilizer wastewater by the combination of electrolysis and microalgae cultivation achieved 96%, 63%, 95%, and 52%, respectively. Chlorella sp. used 3.11% carbon, 15.0% nitrogen, and 13.5% phosphorus in the FW as substrates. This study provided an alternative approach to treat and reuse high-ammonia containing wastewater.

Original languageEnglish (US)
Pages (from-to)139-148
Number of pages10
JournalDesalination and Water Treatment
Volume183
DOIs
StatePublished - Apr 2020

Keywords

  • Ammonia nitrogen
  • Electrochemical oxidation
  • Fertilizer wastewater
  • Microalgae

ASJC Scopus subject areas

  • Water Science and Technology
  • Ocean Engineering
  • Pollution

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