Anammox-synchronous zero-valent iron oxidation promoting synergistic nitrogen and phosphorus removal from wastewater

Zhang, Li; Wang, Yueping; Hao, Shiwei; Dou, Quanhao; Lan, Shuang; Peng, Yongzhen

doi:10.1016/j.biortech.2021.126365

Cited by 44 publications

(7 citation statements)

References 45 publications

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“…Therefore, there was a correlation between the concentrations of COD cr , NH 4 + –N, TN, and TP. Meanwhile, denitrification, synchronous nitrogen and phosphorus removal, and other processes are accompanied by the metabolism of carbon, nitrogen, and phosphorus, leading to closer interrelations among pollutants …”

Section: Resultsmentioning

confidence: 99%

Machine Learning Model for a Biocontact Oxidation Process Driven by Battery-Free Wind-Solar Power Generation─A New Path for Rural Sewage Treatment

Li,

Wang,

Zhou

et al. 2023

ACS EST Eng.

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The energy and operation costs have always been a bottleneck, restricting the development of rural sewage treatment. This work proposes a biocontact oxidation process driven by battery-free wind-solar power generation to implement the automated operation of rural sewage treatment. An automatic machine learning model was designed to predict the performance of the system. Higher accuracy was obtained using the random standard deviation sampling (RSDS) data amplification method. Correlation analysis indicated that influent quality indicators had a path coefficient of 0.899 (p < 0.001) and a significant contribution of 38% for effluent quality variation. Spearman correlation between each influent and effluent quality indicator was greater than 0.9 (p < 0.001), combining variable importance analysis of the model, showing that influent quality indicators presented higher importance than meteorological conditions and power generation capacity. The dependence relationships of important variables on the predicted values and the model stability were further examined using interpretability partial dependence (PD) and individual conditional expectation (ICE) analyses. This study proposed an environmentally friendly rural domestic sewage treatment system with a data-driven system operation model, which provides novel ideas for improving low-carbon and intelligent rural environmental sanitation in the future.

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Section: Resultsmentioning

confidence: 99%

Machine Learning Model for a Biocontact Oxidation Process Driven by Battery-Free Wind-Solar Power Generation─A New Path for Rural Sewage Treatment

Li,

Wang,

Zhou

et al. 2023

ACS EST Eng.

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“…An upflow anaerobic sludge blanket (UASB) reactor with an efficient working volume of 2.5 L was applied in this study (Figure 1). The reactor was inoculated with anammox seeding sludge used in an earlier study 25 (the detailed information on the seed sludge is presented in Text S1 and Table S2) and fed with synthetic wastewater (the composition of the synthetic wastewater is presented in Text S1). The detailed operating parameters are shown in Table S1.…”

Section: Experimental Setup and Reactormentioning

confidence: 99%

ZVI-Mediated High-Rate Nitrogen Removal from Fulvic Acid (FA)-Containing Wastewater by Anammox: Revealing the Genomic and Molecular Level Mechanisms

et al. 2023

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The anammox-based technologies are generally inhibited by refractory dissolved organic matter (rDOM), which is ubiquitous in real wastewater. In this study, a novel cost-effective approach, namely, zero-valent iron (ZVI) treatment, was presented to alleviate such inhibitory effects. The results showed that ZVI mitigated the inhibition of fulvic acids (FA) to anammox. Due to the 2 g/L ZVI addition, the nitrogen removal efficiency (NRE) increased from 83.53 to 90.06% when the FA concentration increased from 0 to 160 mg/L in wastewater. Additionally, the co-occurrence network linking Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) and 16S rRNA sequencing results revealed the mechanism of ZVI mitigating inhibition by promoting the reduction of nitro and nitroso groups of FA and reshaping the metabolic division of functional bacteria. Hydrolytic acidifying bacteria (e.g., Anaerolineaceae and Ignavibacterium) were enriched for FA degradation, which was ultimately beneficial for denitrifying bacteria and anaerobic ammonium oxidation bacteria (AnAOB). Furthermore, metagenomics revealed that ZVI stimulated multiple nitrogen removal formed by anammox, denitrification, and DNRA by accelerating extracellular electron transfer resorting to FA serving as an electron shuttle and upregulating functional genes encoding electron generation, transport, and consumption processes.

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“…Additionally, the crystalline precipitates formed on the biofilm sludge and flocs in MPD/A were examined by using an X-ray powder diffractometer (Bruker D8, Germany). Sample detection and data analysis followed those described by Zhang et al 18 Adenosine triphosphate (ATP) measurements were used to investigate the energy disparities in PD/A systems with different nutrient patterns. The procedure to prepare and calculate total ATP followed the methodology developed by Zhu et al 19 2.3.…”

Section: Introductionmentioning

confidence: 99%

Multipathway of Nitrogen Metabolism Revealed by Genome-Centered Metatranscriptomics from Pyrite-Guided Mixotrophic Partial Denitrification/Anammox Installations

Dou,

Yang,

Peng

et al. 2023

Environ. Sci. Technol.

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Anammox-synchronous zero-valent iron oxidation promoting synergistic nitrogen and phosphorus removal from wastewater

Cited by 44 publications

References 45 publications

Machine Learning Model for a Biocontact Oxidation Process Driven by Battery-Free Wind-Solar Power Generation─A New Path for Rural Sewage Treatment

Machine Learning Model for a Biocontact Oxidation Process Driven by Battery-Free Wind-Solar Power Generation─A New Path for Rural Sewage Treatment

ZVI-Mediated High-Rate Nitrogen Removal from Fulvic Acid (FA)-Containing Wastewater by Anammox: Revealing the Genomic and Molecular Level Mechanisms

Multipathway of Nitrogen Metabolism Revealed by Genome-Centered Metatranscriptomics from Pyrite-Guided Mixotrophic Partial Denitrification/Anammox Installations

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