Evaluation of the joint effects of Cu2+, Zn2+ and Mn2+ on completely autotrophic nitrogen-removal over nitrite (CANON) process

Fan, Liru; Li, Huayu; Chen, Yao; Jia, Fangxu; Liu, Tao; Guo, Jianhua; Yao, Hong

doi:10.1016/j.chemosphere.2021.131896

Cited by 11 publications

(2 citation statements)

References 39 publications

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“…On the other hand, was not studied the metal ions effect (Cu 2+ , Zn 2+ and Mn 2+ ). Metal ions can be positive for the relative abundance of AOB in aqueous media (Fan et al 2022 ). Even so, PBED results allow the establishment of successful modification for a culture medium because 15 days of culture reached high biomass concentrations of a demanding bacterium such as Nitrosomonas europea .…”

Section: Discussionmentioning

confidence: 99%

Wastewater treatment from a science faculty during the COVID-19 pandemic by using ammonium-oxidising and heterotrophic bacteria

Pedroza-Camacho,

Ospina-Sánchez,

Romero-Perdomo

et al. 2024

3 Biotech

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During and after the pandemic caused by the SARS-CoV-2 virus, the use of personal care products and disinfectants increased in universities worldwide. Among these, quaternary ammonium-based products stand out; these compounds and their intermediates caused substantial changes in the chemical composition of the wastewater produced by these institutions. For this reason, improvements and environmentally sustainable biological alternatives were introduced in the existing treatment systems so that these institutions could continue their research and teaching activities. For this reason, the objective of this study was to develop an improved culture medium to cultivate ammonium oxidising bacteria (AOB) to increase the biomass and use them in the treatment of wastewater produced in a faculty of sciences in Bogotá, D.C., Colombia. A Plackett Burman Experimental Design (PBED) and growth curves served for oligotrophic culture medium, and production conditions improved for the AOB. Finally, these bacteria were used with total heterotrophic bacteria (THB) for wastewater treatment in a pilot plant. Modification of base ammonium broth and culture conditions (6607 mg L−1 of (NH4)2SO4, 84 mg L−1 CaCO3, 40 mg L−1 MgSO4·7H2O, 40 mg L−1 CaCl2·2H2O and 200 mg L−1 KH2PO4, 10% (w/v) inoculum, no copper addition, pH 7.0 ± 0.2, 200 r.p.m., 30 days) favoured the growth of Nitrosomonas europea, Nitrosococcus oceani, and Nitrosospira multiformis with values of 8.23 ± 1.9, 7.56 ± 0.7 and 4.2 ± 0.4 Log10 CFU mL−1, respectively. NO2− production was 0.396 ± 0.0264, 0.247 ± 0.013 and 0.185 ± 0.003 mg L−1 for Nitrosomonas europea, Nitrosococcus oceani and Nitrosospira multiformis. After the 5-day wastewater treatment (WW) by co-inoculating the three studied bacteria in the wastewater (with their self-microorganisms), the concentrations of AOB and THB were 5.92 and 9.3 Log10 CFU mL−1, respectively. These values were related to the oxidative decrease of Chemical Oxygen Demand (COD), (39.5 mg L−1), Ammonium ion (NH4+), (6.5 mg L−1) Nitrite (NO2−), (2.0 mg L−1) and Nitrate (NO3−), (1.5 mg L−1), respectively in the five days of treatment. It was concluded, with the improvement of a culture medium and production conditions for three AOB through biotechnological strategies at the laboratory scale, being a promising alternative to bio-augment of the biomass of the studied bacteria under controlled conditions that allow the aerobic removal of COD and nitrogen cycle intermediates present in the studied wastewater.

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Section: Discussionmentioning

confidence: 99%

Wastewater treatment from a science faculty during the COVID-19 pandemic by using ammonium-oxidising and heterotrophic bacteria

Pedroza-Camacho,

Ospina-Sánchez,

Romero-Perdomo

et al. 2024

3 Biotech

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“…Heavy metal ions are essential trace elements for sustaining microbial growth and play a crucial role in stimulating and enhancing microbial metabolism (Hira et al 2012; Kimura and Isaka 2014; Chen et al 2014). However, excessive heavy metals will lead to toxicity in microbial cells and affect the effectiveness of biological nitrogen removal (Zhang et al 2015a;Tang et al 2020;Fan et al 2022). Researches showed that low concentration of zinc ions promoted nitrogen removal, but high concentrations of zinc ion prevented nitrogen removal (Chiang et al 2012;Zhang et al 2023a).…”

Section: Introductionmentioning

confidence: 99%

Combined effect of zinc and cadmium ions on nitrification performance during the biological nitrogen removal of livestock breeding wastewater

Wang,

Huang,

Zhang

et al. 2024

Preprint

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Zinc and cadmium ions are usually found in livestock breeding wastewater, and the mixed ions will have an impact on the biological nitrogen removal. Nitrification performance plays an important role in biological nitrogen removal. In order to investigate the combined effect of zinc and cadmium ions on nitrification performance and to reveal the interactions between zinc and cadmium ions, three concentration ratios of zinc and cadmium ions, as well as 18 different concentration gradients were designed with the direct equipartition ray and the dilution factor method. The effect of pollutants on the nitrification performance of biological nitrogen removal was analyzed by the nonlinear regression equation, and the concentration-addition model was conducted to probe into the relationship between the mixed pollutants and the nitrification performance. The results showed that the effect on nitrification performance increased significantly with the increase of reaction duration and pollutant concentration, which indicated that the effects are concentration-dependent and time-dependent. The concentration-addition model suggested that the interactions between zinc and cadmium ions with different concentration ratios were mainly antagonistic. However, the three concentration ratios of mixed pollutants have different interaction strengths, compared to the zinc and cadmium ions ratio of R1, the ratios of R2 and R3 are more antagonistic and have a greater impact on nitrification performance.

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Combined effect of zinc and cadmium ions on nitrification performance during the biological nitrogen removal of simulated livestock breeding wastewater

Wang,

Huang,

Zhang

et al. 2024

Environ Sci Pollut Res

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Evaluation of the joint effects of Cu2+, Zn2+ and Mn2+ on completely autotrophic nitrogen-removal over nitrite (CANON) process

Cited by 11 publications

References 39 publications

Wastewater treatment from a science faculty during the COVID-19 pandemic by using ammonium-oxidising and heterotrophic bacteria

Wastewater treatment from a science faculty during the COVID-19 pandemic by using ammonium-oxidising and heterotrophic bacteria

Combined effect of zinc and cadmium ions on nitrification performance during the biological nitrogen removal of livestock breeding wastewater

Combined effect of zinc and cadmium ions on nitrification performance during the biological nitrogen removal of simulated livestock breeding wastewater

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