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Updated: Jan 2, 2026

Electrochemically and Bioelectrochemically Induced Ammonium Recovery
Published on: January 22, 2015
A continuous-flow combined process based on partial nitrification-Anammox and partial denitrification-Anammox
Zhong Wang1, Liang Zhang2, Fangzhai Zhang2
1State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
Abstract:
A novel continuous-flow combined process of partial nitrification, Anammox (PN/A) and partial denitrification-Anammox (PD/A) was established to achieve enhanced nitrogen removal from landfill leachate. The NH4+-N transformation rate and NO2--N accumulation rate in the PN reactor reached 93.4% and 91.5%, respectively. The nitrite generated from the PN reactor was combined with influent (38%) and fed into the Anammox reactor. The nitrate produced in the Anammox reactor was then discharged to PD/A reactor, where nitrate was transformed to nitrite and removed via Anammox. Under a COD/NO3--N ratio of 4.0, the NO3--N-to-NO2--N transformation ratio (NTR) and Anammox contribution rate reached 60.4% and 57.1% in PD/A reactor. The final effluent TN concentration was 15.7 mg/L, and the efficiency of TN removal could reach 98.8%. By combining PN/A with PD/A, enhanced nitrogen removal from landfill leachate was achieved successfully with an external carbon source addition (COD/NH4+-N) of 0.28.
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