A predictive model for N2O production in anammox-granular sludge reactors: Combined effects of nitrite/ammonium ratio and organic matter concentration

Pereira, Tiago Duarte Santos; Spindola, R.H.; Rabelo, Camila Abreu B. Silva; Silveira, Natália Carolina; Adorno, Maria Ângela Tallarico; Kunz, Airton; Pires, Eduardo Cleto; Damianovic, Márcia Helena Rissato Zamariolli

doi:10.1016/j.jenvman.2021.113295

Cited by 5 publications

(1 citation statement)

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“…Acetate and glucose are the commonly encountered organic matters. Low concentrations of these organic matters were found to not inhibit AnAOB and sustain a stable total nitrogen removal rate from the anammox granule biomass (Pereira et al 2021). The extracellular polymeric substance contents of AnAOB tended to increase gradually.…”

Section: Introductionmentioning

confidence: 87%

Low-concentration methanol effect on the microorganisms, nitrogen removal, and recovery of the completely autotrophic nitrogen removal over nitrite

Yue

You

Liu

et al. 2022

Water Science and Technology

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Methanol has a significant effect on the performance of the completely autotrophic nitrogen removal over nitrite (CANON) process. In this research, the effect of low-concentration methanol on the functional microorganisms and nitrogen removal and recovery in the CANON system is investigated. The result shows that the anaerobic ammonium-oxidizing bacteria (AnAOB) was suppressed with low-concentration methanol addition, and the phylum Planctomycetes was hidden. The genus Candidatus Brocadia was restrained, and the relative abundances reduced from 25.5% to 15.0% in the upper biofilm and from 20.3% to 14.3% in the bottom biofilm, respectively. However, low-concentration methanol promoted the nitrifying oxidizing bacteria (NOB) activity. This phenomenon reduced the average ammonium nitrogen removal rate from 95.0% to 70.7%, and the average total nitrogen removal rate decreased from 81.3% to 43.6%, respectively. The results demonstrated that the low-concentration methanol as an organic carbon matter harmed the CANON process. Fortunately, the CANON system had an excellent self-healing ability when the methanol was stopped, with the average ammonium nitrogen removal rate and total nitrogen removal rate returning to 95.5% and 80.9%, respectively. This research supplies a reference for practical engineering design and application by improving the understanding of the effects of low-concentration methanol on CANON process performance.

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Section: Introductionmentioning

confidence: 87%