Effect of external hydrazine addition on anammox reactor start-up time

Chemosphere
Sivarajah Ganesan, Vel Murugan Vadivelu

Abstract

Hydrazine is an intermediate product of the anaerobic ammonium oxidation (Anammox) process where both ammonium and nitrite in wastewater are converted to nitrogen gas by bacteria. In this study the effect of external hydrazine addition (5, 10, 15, and 20 mg/L) on the start-up period of the Anammox process was studied using sequencing batch reactors (SBRs). The SBR with an addition of 10 mg/L hydrazine took only 7 weeks to stabilize and achieve the maximum removal of ammonium and nitrite, whereas the SBR without the addition of hydrazine took 12 weeks. The amount of Heme C extracted from the biomass indicated that externally added hydrazine accelerated the growth of Anammox bacteria and reduced the release of nitrous oxide gas from the reactors.

Citations

Nov 16, 2020·The Science of the Total Environment·Hao ShengMinsheng Huang
Nov 18, 2020·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Guangxue WuQidong Yin

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