Nitrite accumulation, denitrification kinetic and microbial evolution in the partial denitrification process: The combined effects of carbon source and nitrate concentration

Zhang, Miao; Tan, Yufei; Fan, Yajun; Gao, Jing; Liu, Yizhong; Lv, Xiaofan; Ge, Liying; Wu, Jun

doi:10.1016/j.biortech.2022.127604

Cited by 50 publications

(5 citation statements)

References 46 publications

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“…This result was different from other studies reporting anammox and denitrification coexisting in a one-stage system with organic matters (Peng et al 2020;Chen et al 2023). The reason for this phenomenon was likely that the low-concentration methanol could suppress the denitrifying bacteria enrichment (Zhang et al 2022). Furthermore, the lowconcentration methanol was challenging to diffuse into the thick biofilm for denitrifying growing bacteria and therefore inhibited the nitrogen removal of this system.…”

Section: Low-concentration Methanol Effect On Microbial Activities An...contrasting

confidence: 84%

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: Low-concentration Methanol Effect On Microbial Activities An...contrasting

confidence: 84%

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

View full text Add to dashboard Cite

show abstract

“…Previous studies have demonstrated that excellent performance of nitrite accumulation could be achieved when sodium acetate was served as electron donor [ 37 , 38 ]. The greatest nitrate to nitrite conversion ratio of about 80%–99% could be achieved in less than 1 h in PD process driven by sodium acetate [ 23 , 31 , 39 , 40 ], which was much higher than the nitrite accumulation in the present study. The difference in nitrite accumulation performance could be explained by the distinction of metabolic patterns of carbon sources [ 31 ].…”

Section: Resultscontrasting

confidence: 49%

Effect of COD/ NO3−-N ratio on nitrite accumulation and microbial behavior in glucose-driven partial denitrification system

Zeng¹,

Wang²,

Zhu³

et al. 2023

Heliyon

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“…In R1, the relative abundances of Thiothrix , Tessaracoccus , and Zoogloea decreased to 6.26, 0.44, and 3.68%, while the relative abundances of Candidatus_Competibacter , Plasticicumulans , norank_f__A4b , norank_f__norank_o__Saccharimonadales , and Micropruina increased to 18.79, 10.87, 9.02, 7.61, and 6.52%, respectively. The decrease in relative abundance of Zoogloea , along with the increased relative abundances of Plasticicumulans , norank_f__A4b , and norank_f__norank_o__Saccharimonadales , which were known for their ability to hydrolyze EPS ( Zhang et al, 2022 ; Jiang et al, 2023 ; Wang et al, 2023 ), collectively contributed to the reduction in EPS content during this stage. Interestingly, the relative abundance of Thiothrix increased to 19.25% in R2-2, however, no excessive filamentous bacteria were observed on the surface of granules in SEM images.…”

Section: Resultsmentioning

confidence: 97%

Positive effects of lignocellulose on the formation and stability of aerobic granular sludge

Xu,

Gao,

et al. 2023

Front. Microbiol.

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IntroductionLignocellulose is one of the major components of particulate organic matter in sewage, which has a significant influence on biological wastewater treatment process. However, the effect of lignocellulose on aerobic granular sludge (AGS) system is still unknown.MethodsIn this study, two reactors were operated over 5 months to investigate the effect of lignocellulose on granulation process, structure stability and pollutants removal of AGS.Results and discussionThe results indicated that lignocellulose not only promoted the secretion of tightly bound polysaccharide in extracellular polymeric substances, but also acted as skeletons within granules, thereby facilitating AGS formation, and enhancing structural strength. Lignocellulose imposed little effect on the removal efficiency of pollutants, with more than 95, 99, and 92% of COD, NH4+-N, and PO43−-P were removed in both reactors. However, it did exhibit a noticeable influence on pollutants conversion processes. This might be due to that the presence of lignocellulose promoted the enrichment of functional microorganisms, including Candidatus_Accumulibacter, Candidatus_Competibacter, Nitrosomonas, and Nitrospira, etc. These findings might provide valuable insights into the control strategy of lignocellulose in practical AGS systems.

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Nitrite accumulation, denitrification kinetic and microbial evolution in the partial denitrification process: The combined effects of carbon source and nitrate concentration

Cited by 50 publications

References 46 publications

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

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

Effect of COD/ NO3−-N ratio on nitrite accumulation and microbial behavior in glucose-driven partial denitrification system

Positive effects of lignocellulose on the formation and stability of aerobic granular sludge

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