Evaluation of the inhibitory effects of heavy metals on anammox activity: A batch test study

Zhang, Zheng-Zhe; Zhang, Qianqian; Xu, Jiajia; Deng, Rui; Ji, Zheng-Quan; Wu, Yuhuan; Jin, Ren‐Cun

doi:10.1016/j.biortech.2015.10.035

Cited by 93 publications

(30 citation statements)

References 23 publications

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“…The anammox process is sensitive to several operating parameters, such as dissolved oxygen (Cema et al, 2011), nitrogen loading rate (Dapena-Mora et al, 2004), pH (Jaroszynski et al, 2011), temperature (Dosta et al, 2008), biofilm thickness (granule size) (Ni et al, 2010), and inhibitory chemicals (e.g., heavy metals, antibiotics, etc.) (Lotti et al, 2012;Zhang et al, 2016aZhang et al, , 2016b. The early implementations used two-stage configurations, such as SHARON (Single reactor system for High activity Ammonium Removal Over Nitrite).…”

Section: Principles Of Nitritation-anammox Processmentioning

confidence: 99%

Status, Challenges, and Perspectives of Mainstream Nitritation–Anammox for Wastewater Treatment

Klaus

Bott

et al. 2018

Water Environment Research

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The nitritation-anammox process is an efficient and cost-effective approach for biological nitrogen removal, but its application in treating mainstream wastewater remains a great challenge. Mainstream nitritation-anammox processes could create opportunities for achieving energy self-sufficient, or energy-generating water resource recovery facilities. Significant advancements have been achieved via pilot- and full-scale trials to overcome the major obstacles under mainstream conditions, such as repression of nitrite-oxidizing bacteria, limiting the overgrowth of denitrifiers, and effective selection and retention of ammonia-oxidizing bacteria and anammox bacteria. This review paper intends to provide a detailed update of research progress on mainstream nitritation-anammox processes, discuss metabolic interactions, and examine major challenges and possible solutions towards the future development.

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Section: Principles Of Nitritation-anammox Processmentioning

confidence: 99%

Status, Challenges, and Perspectives of Mainstream Nitritation–Anammox for Wastewater Treatment

Klaus

Bott

et al. 2018

Water Environment Research

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“…Heavy metal concentration was increased stepwise from 0.2 mg L −1 to 8 mg L −1 and the average removal rate of nitrogen was found at 97% to 6 ppm Cu addition. The enhancement effect of Cu addition at low concentrations has been reported by many researchers [27,39]. In literature, the presence of some heavy metals at low concentrations play a crucial role to stimulate metabolism of microorganisms.…”

Section: Long-term Effect Of Cu On Anammoxmentioning

confidence: 99%

“…The consistency of the inhibition model to the experimental data was fitted with minimum squared errors method and it was found that modified non-competitive is the most representative model. Also, some researchers used the modified non-competitive model to express the heavy metal inhibition on the biochemical process [27,34,36,37]. Therefore, IC50 values for short-term inhibition was determined by modified non-competitive inhibition model.…”

Section: Short-term Effect Of Cu On Anammoxmentioning

confidence: 99%

“…Consequently, many studies have been focused on a great variety of inhibitory factors over the Anammox process in wastewater streams including organic matter [20], substrates [11,21,22], salts [23] etc. So far, however, little attention has been paid to inhibitory effects of heavy metals [24][25][26][27][28] and little is known about the short and long-term effect of copper on Anammox activity.…”

Section: Introductionmentioning

confidence: 99%

“…Although some of the heavy metals are fundamental for microbial cell production, they are also common inhibitors for biological processes in high concentrations. Although some specific heavy metals have been studied Cd(II), Cu(II), Ni(II), Zn(II), Hg, Pb, Ag on Anammox activity [24][25][26][27][28][30][31][32][33][34], there has been little agreement on inhibition doses of these heavy metals. However, the experimental data are rather controversial, and there is no general agreement about inhibitory concentrations.…”

Section: Introductionmentioning

confidence: 99%

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Short-Term and Long-Term Inhibitory Effects of Copper on Anammox Process

et al. 2018

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Abstract:The main goal of this study is to evaluate the short-term and long-term inhibitory effects of Cu (II) on Anammox process. To investigate the short-term inhibition level, four different concentrations (1, 2.5, 5 and 10 mg L −1 as Cu 2+ ) were tested in batch reactors. IC50 levels for short-term exposure deduced as 4.57mg L −1 (R 2 : 0.97) from the modified non-competitive inhibition model. Lab-scale continuous flow up-flow fixed bed reactor with Kaldness biofilm carriers was operated 240 days with gradually increased Cu concentrations (from 0.2 to 8 mg L −1 ). To identify the IC50 levels in case of prolonged exposure of Cu(II), experimental data were fitted with a modified non-competitive inhibition model, and calculated as 6.77 mg L −1 (R 2 : 0.95). The results show that the IC50 level for copper in long-term exposure was higher than in short-term exposure and the possible reason for that is the self-adaptation of Anammox bacteria.

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Feasibility of CANON process for treating nitrogenous wastewater containing heavy metals

Zhao

Zhang

Li³

et al. 2020

J of Chemical Tech & Biotech

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The appearance of heavy metals in wastewater brings a major burden to wastewater treatment plants, due to the high toxicity to microorganisms. Several commonly used heavy metals, including Zn(II), Cd(II), Hg(II), and Pb(II) were adopted to clear the individual and joint toxicity to the completely autotrophic nitrogen removal over nitrite (CANON) process in six sequencing batch reactors. The obtained results suggested that the nitrogen removal performances were transiently inhibited, but rapidly recovered. The restoration period under the stress of Hg(II) and Pb(II) was shorter than that under Zn(II), Cd(II), and the joint heavy metals. During the long-term exposure, Cd(II) in 1mg L −1 slightly inhibited the nitrogen removal, while Zn(II), Hg(II), Pb(II), and mixture showed a negligible impact on CANON process. The defense of extracellular polymeric substances (EPS), the good adaptability of functional bacteria, and the inducement of resistant genera by heavy metals all contributed to the robustness and stability of CANON process. Therefore, it is feasible to treat nitrogenous wastewater containing low heavy metals using CANON process.

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Evaluation of the inhibitory effects of heavy metals on anammox activity: A batch test study

Cited by 93 publications

References 23 publications

Status, Challenges, and Perspectives of Mainstream Nitritation–Anammox for Wastewater Treatment

Status, Challenges, and Perspectives of Mainstream Nitritation–Anammox for Wastewater Treatment

Short-Term and Long-Term Inhibitory Effects of Copper on Anammox Process

Feasibility of CANON process for treating nitrogenous wastewater containing heavy metals

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