The short- and long-term effects of Mn2+ on biogranule-based anaerobic ammonium oxidation (anammox)

Xu, Jiajia; Zhang, Zheng-Zhe; Chen, Qianqian; Ji, Zheng-Quan; Zhu, Ying-Hong; Jin, Ren‐Cun

doi:10.1016/j.biortech.2017.06.014

Cited by 33 publications

(12 citation statements)

References 45 publications

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“…For instance, Xu studied the short-term and longterm effects of Mn 2+ on the performance of anammox granular sludge. With the increase of Mn 2+ concentration, the activity of anammox bacteria, heme C and extracellular polymer content increased first and then decreased [29]. Wiens also found that Fe 3+ (≤5 mu M) can promote the accumulation of microbial biomass, speed up their domestication process, and promote the secretion of extracellular polymeric substances [30].…”

Section: Optimal Concentration Of Zn(ii)mentioning

confidence: 94%

Mechanism of Zn(II) enhanced biodegradation of m-dichlorobenzene

Shang

Yang

et al. 2021

Environmental Pollutants and Bioavailability

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M-dichlorobenzene can be degraded through biotrickling filter (BTF). However, its degradation needs to be enhanced, and the mechanism of enhancement is unclear. In this study, Zn(II) was taken as the biological growth promoter; the polysaccharides and proteins, zeta potential, Fourier transform infrared spectroscopy, x-ray photoelectron spectroscopy, and the enzyme activity of the strains were analyzed. The results indicated that Zn(II) at 5mg/L promoted the growth of the strain. When the inlet concentration was 505.74 mg/m 3 and the empty bed resistance time (EBRT) was 90 s, the removal efficiency of BTF2 was 86.15%. In BTF2, the enzyme activity, polysaccharide, and protein content increased, while the zeta potential decreased. The changes of zeta potential indicated that there existed an electrostatic interaction between extracellular polymeric substance (EPS) and Zn(II). The results of Fourier transform infrared spectroscopy and x-ray photoelectron spectroscopy confirmed that there was a bond between the EPS surface functional groups and Zn(II).

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Section: Optimal Concentration Of Zn(ii)mentioning

confidence: 94%

Mechanism of Zn(II) enhanced biodegradation of m-dichlorobenzene

Shang

Yang

et al. 2021

Environmental Pollutants and Bioavailability

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“…The medium solution was sparged with nitrogen gas to obtain anoxic conditions. 26 The SAA was calculated using the equation SAA = MSCR/VSS (MSCR is the maximum substrate consumption rate) according to the methodology described by Xu et al and Jin et al 18,27 Table 1 presents the initial experimental conditions for the analysis of the short-term effects of Y(III) on anammox.…”

Section: Batch Testmentioning

confidence: 99%

“…However, inherent challenges remain in the practical application of the anammox process, and in recent t years, extensive attention has been paid to the potential inhibitory effects of metals on the reactivity and performance of anammox consortia. [12][13][14][15][16][17][18] Y(III) is the most common rare earth element in weathered crust elution-deposited rare earth ore. 19 However, so far, there are no studies and reports on the effect of yttrium on the anammox process. The response of the anammox process to yttrium stress and the inhibition mechanism both remain unclear.…”

Section: Introductionmentioning

confidence: 99%

Effect of rare earth element Y(III) on short‐term denitrification performance of anaerobic ammonia oxidized granular sludge

Wan

Xiao

et al. 2022

J of Chemical Tech & Biotech

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BACKGROUND The ammonia‐nitrogen wastewater generated during rare‐earth mining poses a serious hazard to the environment around the mine. This type of wastewater is difficult to treat using conventional biological methods due to its low carbon‐to‐nitrogen ratio. Anaerobic ammonia oxidation (anammox) has become the first choice for treating rare earth mine wastewater. However, the effect of rare earth elements (REEs) in wastewater on anammox bacteria has been insufficiently studied, and this limits the application of this process. Yttrium is a rare earth element present in wastewater, and the study of its effect on anammox can help in the application of this process in rare earth mine wastewater. RESULTS The effect of Y(III) on anammox granular sludge was studied using batch experiments. Anammox activity decreased with increasing Y(III) concentration, from 64.78 ± 0.28 to 17.15 ± 2.70 mg g−1 VSS day−1. The semi‐inhibitory concentration (IC50) of Y(III) for anammox activity was 30.36 mg L−1. Y (III) exhibited low promotion and high inhibition of anammox bacterial extracellular polymer secretion (EPS). Comparing the kinetic models, the Loung model is better suited for describing the kinetic equation of substrate concentration on anammox. CONCLUSION The acute toxicity of Y(III) to anaerobic sludge is influenced by the substrate and Y (III) concentrations. EPS‐based defence strategies play an important role in counteracting the toxicity of Y(III). The Edwards model fits the experimental data well and is suitable for predicting the inhibition of anammox activity by the substrate concentration. © 2022 Society of Chemical Industry (SCI).

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“…They suggested that Zn(II) (0.8 mg L −1 ) was the main inhibitor. The half maximal inhibitory concentration (IC 50 ) of Ni(II) was determined as 14.6 mg L −1 in a short-term batch test (Xu et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Long-Term Limitation Effects of Se(VI), Zn(II), and Ni(II) on Start-Up of the Anammox Process Using Gel Carrier

Isaka

Sugawara

Yamazaki

et al. 2022

Front. Bioeng. Biotechnol.

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Anaerobic ammonia oxidation (anammox) bacteria are inhibited by heavy metals at high concentrations but require trace amounts of some heavy-metal elements for growth and activity maintenance. The present study evaluates the long-term limitation effects of Se(VI), Zn(II), and Ni(II) on the start-up period of an anammox reactor. To strictly limit the levels of heavy metals in the reactor, all tests used ultrapure water as the influent synthetic wastewater and all reactors were installed in a clean booth. The anammox biomass was maintained through the gel entrapment technique. In the absence of Se(VI) and Ni(II), the anammox reactor start-up was 18.9 kg-N (m3-carrier d)−1 (nitrogen conversion rate (NCR) per gel carriers), indicating that Se(VI) and Ni(II) are not required or need not be continuously added to maintain the anammox process. Under Zn(II) limitation, the anammox process failed to start-up and the NCR tended to decrease rapidly. After readdition of 0.005 mg L−1 of Zn(II), the NCR did not decline further and instead partially recovered at a very slow rate. The NCR was completely recovered after adding 0.020 mg L−1 of Zn(II). These results reveal that Zn(II) limitation seriously affects the start-up of the anammox process while Se(VI) and Ni(II) are not required or need not be continuously added to the anammox process.

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The short- and long-term effects of Mn2+ on biogranule-based anaerobic ammonium oxidation (anammox)

Cited by 33 publications

References 45 publications

Mechanism of Zn(II) enhanced biodegradation of m-dichlorobenzene

Mechanism of Zn(II) enhanced biodegradation of m-dichlorobenzene

Effect of rare earth element Y(III) on short‐term denitrification performance of anaerobic ammonia oxidized granular sludge

Long-Term Limitation Effects of Se(VI), Zn(II), and Ni(II) on Start-Up of the Anammox Process Using Gel Carrier

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