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学者姓名：陈学明
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Abstract ：
This study attempted to compare the enrichment of complete ammonium oxidation (comammox) bacteria, which are affiliated with Nitrospira and not able to generate nitrous oxide (N2O, a potent greenhouse gas) through biological pathways, in two commonly-utilized configurations of floccular sludge reactors, i.e., sequencing batch reactor (SBR) and continuous stirred tank reactor (CSTR), under the ammonium condition of mainstream wastewater (i.e., 40.0 g-N/m(3)). The results in terms of nitrification performance and microbial analyses during 216-d operation showed that compared with SBR offering a fluctuating but generally higher in-situ ammonium concentration (i.e., 1.0-6.0 g-N/m(3)) which was favorable for the growth of ammonium-oxidizing bacteria (AOB, belonging to Nitrosomonas in this study), CSTR managed to lower the in-situ ammonium level to < 2.0 g-N/m(3), thus creating a competitive advantage for comammox bacteria with a highly oligotrophic lifestyle. Such an argument was further supported by dedicated batch tests which revealed that Nitrospira-dominant sludge had a lower maximum ammonium oxidation rate and lower apparent ammonium and oxygen affinity constants than Nitrosomonas-dominant sludge (i.e., 33.5 +/- 2.1 mg-N/h/g-MLVSS vs. 139.9 +/- 26.7 mg-N/h/g-MLVSS, 1.1 +/- 0.1 g-N/m(3) vs. 17.6 +/- 4.6 g-N/m(3), and 0.017 +/- 0.002 g-O-2/m(3) vs. 0.037 +/- 0.013 g-O-2/m(3), respectively), proving the nature of comammox bacteria as a K-strategist. Overall, this study not only provided useful insights into the effective enrichment of comammox bacteria in floccular sludge but also further revealed the interactions between comammox bacteria and AOB, thereby contributing to the future development of comammox-inclusive biological nitrogen removal technologies for sustainable wastewater treatment.
Keyword ：
Ammonium-oxidizing bacteria (AOB) Ammonium-oxidizing bacteria (AOB) Complete ammonium oxidation (comammox) bacteria Complete ammonium oxidation (comammox) bacteria Continuous stirred tank reactor (CSTR) Continuous stirred tank reactor (CSTR) r/K-strategists r/K-strategists Sequencing batch reactor (SBR) Sequencing batch reactor (SBR)
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| GB/T 7714 | Zhu, Ying , Hou, Jiaying , Meng, Fangang et al. Comparative enrichment of complete ammonium oxidation bacteria in floccular sludge reactors: Sequencing batch reactor vs. continuous stirred tank reactor [J]. | WATER RESEARCH X , 2025 , 27 . |
| MLA | Zhu, Ying et al. "Comparative enrichment of complete ammonium oxidation bacteria in floccular sludge reactors: Sequencing batch reactor vs. continuous stirred tank reactor" . | WATER RESEARCH X 27 (2025) . |
| APA | Zhu, Ying , Hou, Jiaying , Meng, Fangang , Xu, Meiying , Lin, Limin , Yang, Linyan et al. Comparative enrichment of complete ammonium oxidation bacteria in floccular sludge reactors: Sequencing batch reactor vs. continuous stirred tank reactor . | WATER RESEARCH X , 2025 , 27 . |
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This study aims to formulate the degradation mechanism of polyamide membrane by chlorine, and to assess the role of Ca2+ or Mg2+ involved in chlorination. By adjusting chlorination pH, two competing degradation mechanisms, namely chlorination-promoted hydrogen bond cleavage and chlorination-promoted hydrolysis, were first time proposed. Hydrogen bond cleavage promoted severe compaction (reduced pore radius), while hydrolysis led to a loose but non-compactable structure (increased pore radius), causing opposite trends in membrane filtration performance at different pHs. The pore radius and water flux were reduced by 33% and 69% at chlorination pH 4.0, however, water flux was increased by 45% at chlorination pH 10.0. Therefore, intermolecular rather than intramolecular bonds regulate the rotational freedom and then affect compactness of polyamide layers under pressure. Ca2+ or Mg2+ further amplified these effects of chlorine, i.e., water flux was further reduced by 7%-10% at pH 4.0 and further increased by 23%-48% at pH 7.0-10.0. The coordination between carbonyl oxygen and Ca2+ or Mg2+, evidenced by simulated molecular electrostatic potential and binding energies, initiated excessive hydrogen bond breakage between C--O and N-H. Consequently, it prompted N-chlorination, as non-hydrogen-bonded N-H has a higher chlorination priority than hydrogen- bonded N-H. In addition, Ca2+ or Mg2+ accelerated chlorination-promoted hydrolysis.
Keyword ：
Calcium Calcium Chlorination Chlorination Hydrogen bond Hydrogen bond Hydrolysis Hydrolysis Magnesium Magnesium Polyamide membranes Polyamide membranes
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| GB/T 7714 | Yu, Qinyu , Wu, Shuang , Yang, Linyan et al. New insights to chlorination-induced chemical bond cleavage in polyamide membranes: Degradation mechanisms and the role of calcium and magnesium ions [J]. | CHEMICAL ENGINEERING JOURNAL , 2025 , 505 . |
| MLA | Yu, Qinyu et al. "New insights to chlorination-induced chemical bond cleavage in polyamide membranes: Degradation mechanisms and the role of calcium and magnesium ions" . | CHEMICAL ENGINEERING JOURNAL 505 (2025) . |
| APA | Yu, Qinyu , Wu, Shuang , Yang, Linyan , Chen, Xueming , Tao, Min , Wu, Yi et al. New insights to chlorination-induced chemical bond cleavage in polyamide membranes: Degradation mechanisms and the role of calcium and magnesium ions . | CHEMICAL ENGINEERING JOURNAL , 2025 , 505 . |
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The kinetics of polyamide membrane degradation by free chlorine and halide ions (Br- and Cl-) were innovatively evaluated based on physicochemical properties and filtration performance, using water/solute permeability coefficient in addition to bromide incorporation as important indicators. The reaction rate constants for the reduced water and H3BO3 permeability coefficient were 1-2 orders of magnitude higher at 0-1 h than 1-10 h. N-bromination and bromination-promoted hydrolysis are dominant degradation mechanisms at 0-1 h (reflected by the breakage of hydrogen bond, the increased Ca binding content, and the increased charge density), and ring-bromination further occurs at 1-10 h (reflected by the disappearance or weakening of aromatic amide band and the nearly constant hydrogen bond). The more reactive but less abundant brominating agents (Br2O, BrOCl, BrCl, and Br-2) played significant roles in membrane degradation, contradicting the conventional belief that HOBr is the only reactive species. BrCl at pH 4.0 and BrOCl and Br2O at pH 7.0 made significantly higher contributions to membrane degradation than HOBr (>76 % vs. <13 %). The increased contribution of BrCl and Br-2 with the increased [Cl-] and [Br-](ex) (the excess bromide, defined as [Br-](o) - [HOCl](o) when [Br-](o) > [HOCl](o)), respectively, was responsible for the greater reduction of water permeability coefficient. The innovative and simple approach developed in this study provides important insights to evaluate and predict membrane degradation.
Keyword ：
Halogenating agents Halogenating agents Halogenation Halogenation Membrane degradation Membrane degradation Polyamide membranes Polyamide membranes Reaction kinetics Reaction kinetics
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| GB/T 7714 | Yang, Linyan , Yu, Haixiang , Zhao, Huihui et al. Degradation of polyamide nanofiltration membranes by free chlorine and halide ions: Kinetics, mechanisms, and implications [J]. | WATER RESEARCH , 2025 , 272 . |
| MLA | Yang, Linyan et al. "Degradation of polyamide nanofiltration membranes by free chlorine and halide ions: Kinetics, mechanisms, and implications" . | WATER RESEARCH 272 (2025) . |
| APA | Yang, Linyan , Yu, Haixiang , Zhao, Huihui , Xia, Caiping , Yu, Qinyu , Chen, Xueming et al. Degradation of polyamide nanofiltration membranes by free chlorine and halide ions: Kinetics, mechanisms, and implications . | WATER RESEARCH , 2025 , 272 . |
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Producing medium chain fatty acids (MCFAs) from waste activated sludge (WAS) is crucial for sustainable chemical industries. This study addressed the electron donor requirement for MCFAs production by inoculating Lactobacillus at varying concentrations (7.94 × 1010, 3.18 × 1011, and 6.35 × 1011 cell/L) to supply lactate internally. Interestingly, the highest MCFAs yield (∼2000 mg COD/L) occurred at the lowest Lactobacillus inoculation. Higher inoculation concentrations redirected more carbon from WAS towards alcohols production rather than MCFAs generation, with up to 2852 mg COD/L alcohols obtained under 6.35 × 1011 cell/L inoculation. Clostridium dominance and increased genes abundance for substrate hydrolysis, lactate conversion, and MCFAs/alcohol production collectively enhanced WAS-derived MCFAs and alcohols synthesis after Lactobacillus inoculation. Overall, the strategy of Lactobacillus inoculation regulated fermentation outcomes and subsequent carbon recovery in WAS, presenting a sustainable technology to achieve liquid bio-energy production from underutilized wet wastes. © 2024 The Authors
Keyword ：
Chain elongation Chain elongation Liquid products Liquid products Metagenomic analysis Metagenomic analysis Self-supplied lactate Self-supplied lactate
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| GB/T 7714 | Wu, L. , Ngo, H.H. , Wang, C. et al. Lactobacillus inoculation mediated carboxylates and alcohols production from waste activated sludge fermentation system: Insight into process outcomes and metabolic network [J]. | Bioresource Technology , 2024 , 409 . |
| MLA | Wu, L. et al. "Lactobacillus inoculation mediated carboxylates and alcohols production from waste activated sludge fermentation system: Insight into process outcomes and metabolic network" . | Bioresource Technology 409 (2024) . |
| APA | Wu, L. , Ngo, H.H. , Wang, C. , Hou, Y. , Chen, X. , Guo, W. et al. Lactobacillus inoculation mediated carboxylates and alcohols production from waste activated sludge fermentation system: Insight into process outcomes and metabolic network . | Bioresource Technology , 2024 , 409 . |
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In this study, two bioprocess models were first constructed with the newly-discovered comammox process described as one-step and two-step nitrification and evaluated against relevant experimental data. The validated models were then applied to reveal the potential effect of comammox bacteria on the granular bioreactor particularly suitable for undertaking partial nitritation/anammox (PN/A) under different operating conditions of bulk dissolved oxygen (DO) and influent NH4+. The results showed although comammox bacteria-based PN/A could achieve > 80.0 % total nitrogen (TN) removal over a relatively wider range of bulk DO and influent NH4+ (i.e., 0.25–0.40 g‐O2/m3 and 470–870 g‐N/m3, respectively) without significant nitrous oxide (N2O) production (4+ to avoid the undesired full nitrification by comammox bacteria. Comparatively, conventional ammonium‐oxidizing bacteria (AOB)-based PN/A not only required higher bulk DO to achieve > 80.0 % TN removal but also suffered from 1.7 %∼2.8 % N2O production. © 2024 Elsevier Ltd
Keyword ：
Bacteria Bacteria Bioconversion Bioconversion Bioreactors Bioreactors Dissolved oxygen Dissolved oxygen Nitrification Nitrification Nitrogen oxides Nitrogen oxides Nitrogen removal Nitrogen removal
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| GB/T 7714 | Zhu, Ying , Hou, Jiaying , Meng, Fangang et al. Role of comammox bacteria in granular bioreactor for nitrogen removal via partial nitritation/anammox [J]. | Bioresource Technology , 2024 , 406 . |
| MLA | Zhu, Ying et al. "Role of comammox bacteria in granular bioreactor for nitrogen removal via partial nitritation/anammox" . | Bioresource Technology 406 (2024) . |
| APA | Zhu, Ying , Hou, Jiaying , Meng, Fangang , Lu, Huijie , Zhang, Yanlong , Ni, Bing-Jie et al. Role of comammox bacteria in granular bioreactor for nitrogen removal via partial nitritation/anammox . | Bioresource Technology , 2024 , 406 . |
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The presence of polyethylene terephthalate (PET) microplastics (MPs) in waters has posed considerable threats to the environment and humans. In this work, a heterogeneous electro-Fenton-activated persulfate oxidation system with the FeS2-modified carbon felt as the cathode (abbreviated as EF-SR) was proposed for the efficient degradation of PET MPs. The results showed that i) the EF-SR system removed 91.3 ± 0.9 % of 100 mg/L PET after 12 h at the expense of trace loss (< 0.07 %) of [Fe] and that ii) dissolved organics and nanoplastics were first formed and accumulated and then quickly consumed in the EF-SR system. In addition to the destruction of the surface morphology, considerable changes in the surface structure of PET were noted after EF-SR treatment. On top of the emergence of the O-H bond, the ratio of C-O/C=O to C-C increased from 0.25 to 0.35, proving the rupture of the backbone of PET and the formation of oxygen-containing groups on the PET surface. With the verified involvement and contributions of SO4•- and •OH, three possible paths were proposed to describe the degradation of PET towards complete mineralization through chain cleavage and oxidation in the EF-SR system. © 2024 Elsevier B.V.
Keyword ：
Electro-Fenton Electro-Fenton Hydroxyl radical Hydroxyl radical Microplastics Microplastics Polyethylene terephthalate Polyethylene terephthalate Sulfate radical Sulfate radical
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| GB/T 7714 | Lin, Y. , Zhang, Y. , Wang, Y. et al. Efficient degradation and mineralization of polyethylene terephthalate microplastics by the synergy of sulfate and hydroxyl radicals in a heterogeneous electro-Fenton-activated persulfate oxidation system [J]. | Journal of Hazardous Materials , 2024 , 478 . |
| MLA | Lin, Y. et al. "Efficient degradation and mineralization of polyethylene terephthalate microplastics by the synergy of sulfate and hydroxyl radicals in a heterogeneous electro-Fenton-activated persulfate oxidation system" . | Journal of Hazardous Materials 478 (2024) . |
| APA | Lin, Y. , Zhang, Y. , Wang, Y. , Lv, Y. , Yang, L. , Chen, Z. et al. Efficient degradation and mineralization of polyethylene terephthalate microplastics by the synergy of sulfate and hydroxyl radicals in a heterogeneous electro-Fenton-activated persulfate oxidation system . | Journal of Hazardous Materials , 2024 , 478 . |
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Anaerobic microalgae fermentation, leveraging its cost-effectiveness and the adaptability of mixed cultures, holds promise for carboxylate biosynthesis. Microalgae, with their abundant carbohydrates and proteins, stand out as an optimal substrate for this process among various options. Furthermore, microalgae fermentation not only shows the potential to mitigate risks associated with algae blooms but also aligns with the need for sustainable practices. However, the limited utilization rate of microalgae in anaerobic fermentation poses challenges to achieving high production rates of desired products. In this study, we implemented a bioaugmentation process with yeast to enhance carboxylate production performance of microalgae fermentation. The results demonstrated a fourfold increase in carboxylate yield with the addition of yeast. In-situ ethanol production facilitated the conversion of short-chain carboxylic acids into medium-chain carboxylates, achieving a yield of 46.3 mM-C/g VS. The presence of yeast significantly enhanced substrate utilization from 20 % to 80 %, steering the metabolic pathway towards chain elongation. Metagenomic analysis further revealed metabolic shifts following yeast addition, particularly an increased abundance of genes involved in acetyl-CoA production. Notably, the aldehyde:ferredoxin oxidoreductase (AOR) pathway emerged as a key driver in butanol production. These findings highlight the improved performance of anaerobic microalgae fermentation with yeast, enabling efficient production of higher value bioproducts while eliminating the need for external electron donors. © 2024 The Author(s)
Keyword ：
Anaerobic fermentation Anaerobic fermentation Butanol Butanol Medium-chain carboxylic acids Medium-chain carboxylic acids Microalgae Microalgae Yeast bioaugmentation Yeast bioaugmentation
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| GB/T 7714 | Shi, X. , Ju, F. , Wei, W. et al. Bioaugmentation of microalgae fermentation with yeast for enhancing microbial chain elongation: In-situ ethanol production and metabolic potential [J]. | Chemical Engineering Journal , 2024 , 498 . |
| MLA | Shi, X. et al. "Bioaugmentation of microalgae fermentation with yeast for enhancing microbial chain elongation: In-situ ethanol production and metabolic potential" . | Chemical Engineering Journal 498 (2024) . |
| APA | Shi, X. , Ju, F. , Wei, W. , Wu, L. , Chen, X. , Ni, B.-J. . Bioaugmentation of microalgae fermentation with yeast for enhancing microbial chain elongation: In-situ ethanol production and metabolic potential . | Chemical Engineering Journal , 2024 , 498 . |
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Abstract ：
In this study, two bioprocess models were first constructed with the newly-discovered comammox process described as one-step and two-step nitrification and evaluated against relevant experimental data. The validated models were then applied to reveal the potential effect of comammox bacteria on the granular bioreactor particularly suitable for undertaking partial nitritation/anammox (PN/A) under different operating conditions of bulk dissolved oxygen (DO) and influent NH4+. The results showed although comammox bacteria-based PN/A could achieve > 80.0 % total nitrogen (TN) removal over a relatively wider range of bulk DO and influent NH4+ (i.e., 0.25-0.40 g-O-2/m(3) and 470-870 g-N/m(3), respectively) without significant nitrous oxide (N2O) production (< 0.1 %), the bulk DO should be finely controlled based on the influent NH4+ to avoid the undesired full nitrification by comammox bacteria. Comparatively, conventional ammonium-oxidizing bacteria (AOB)-based PN/A not only required higher bulk DO to achieve > 80.0 % TN removal but also suffered from 1.7 %similar to 2.8 % N2O production.
Keyword ：
Complete ammonium oxidation (comammox) Complete ammonium oxidation (comammox) Granular bioreactor Granular bioreactor Modeling Modeling Nitrous oxide(N2O) Nitrous oxide(N2O) Partial nitritation/anammox (PN/A) Partial nitritation/anammox (PN/A)
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| GB/T 7714 | Zhu, Ying , Hou, Jiaying , Meng, Fangang et al. Role of comammox bacteria in granular bioreactor for nitrogen removal via partial nitritation/anammox [J]. | BIORESOURCE TECHNOLOGY , 2024 , 406 . |
| MLA | Zhu, Ying et al. "Role of comammox bacteria in granular bioreactor for nitrogen removal via partial nitritation/anammox" . | BIORESOURCE TECHNOLOGY 406 (2024) . |
| APA | Zhu, Ying , Hou, Jiaying , Meng, Fangang , Lu, Huijie , Zhang, Yanlong , Ni, Bing-Jie et al. Role of comammox bacteria in granular bioreactor for nitrogen removal via partial nitritation/anammox . | BIORESOURCE TECHNOLOGY , 2024 , 406 . |
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Abstract ：
Producing medium chain fatty acids (MCFAs) from waste activated sludge (WAS) is crucial for sustainable chemical industries. This study addressed the electron donor requirement for MCFAs production by inoculating Lactobacillus at varying concentrations (7.94 x 10(10), 3.18 x 10(11), and 6.35 x 10(11) cell/L) to supply lactate internally. Interestingly, the highest MCFAs yield (similar to 2000 mg COD/L) occurred at the lowest Lactobacillus inoculation. Higher inoculation concentrations redirected more carbon from WAS towards alcohols production rather than MCFAs generation, with up to 2852 mg COD/L alcohols obtained under 6.35 x 10(11) cell/L inoculation. Clostridium dominance and increased genes abundance for substrate hydrolysis, lactate conversion, and MCFAs/alcohol production collectively enhanced WAS-derived MCFAs and alcohols synthesis after Lactobacillus inoculation. Overall, the strategy of Lactobacillus inoculation regulated fermentation outcomes and subsequent carbon recovery in WAS, presenting a sustainable technology to achieve liquid bio-energy production from underutilized wet wastes.
Keyword ：
Chain elongation Chain elongation Liquid products Liquid products Metagenomic analysis Metagenomic analysis Self-supplied lactate Self-supplied lactate
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| GB/T 7714 | Wu, Lan , Ngo, Huu Hao , Wang, Chen et al. Lactobacillus inoculation mediated carboxylates and alcohols production from waste activated sludge fermentation system: Insight into process outcomes and metabolic network [J]. | BIORESOURCE TECHNOLOGY , 2024 , 409 . |
| MLA | Wu, Lan et al. "Lactobacillus inoculation mediated carboxylates and alcohols production from waste activated sludge fermentation system: Insight into process outcomes and metabolic network" . | BIORESOURCE TECHNOLOGY 409 (2024) . |
| APA | Wu, Lan , Ngo, Huu Hao , Wang, Chen , Hou, Yanan , Chen, Xueming , Guo, Wenshan et al. Lactobacillus inoculation mediated carboxylates and alcohols production from waste activated sludge fermentation system: Insight into process outcomes and metabolic network . | BIORESOURCE TECHNOLOGY , 2024 , 409 . |
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The presence of polyethylene terephthalate (PET) microplastics (MPs) in waters has posed considerable threats to the environment and humans. In this work, a heterogeneous electro-Fenton-activated persulfate oxidation system with the FeS2-modified carbon felt as the cathode (abbreviated as EF-SR) was proposed for the efficient degradation of PET MPs. The results showed that i) the EF-SR system removed 91.3 +/- 0.9 % of 100 mg/L PET after 12 h at the expense of trace loss (< 0.07 %) of [Fe] and that ii) dissolved organics and nanoplastics were first formed and accumulated and then quickly consumed in the EF-SR system. In addition to the destruction of the surface morphology, considerable changes in the surface structure of PET were noted after EF-SR treatment. On top of the emergence of the O-H bond, the ratio of C-O/C=O to C-C increased from 0.25 to 0.35, proving the rupture of the backbone of PET and the formation of oxygen-containing groups on the PET surface. With the verified involvement and contributions of SO4 center dot- and (OH,)-O-center dot three possible paths were proposed to describe the degradation of PET towards complete mineralization through chain cleavage and oxidation in the EF-SR system.
Keyword ：
Electro-Fenton Electro-Fenton Hydroxyl radical Hydroxyl radical Microplastics Microplastics Polyethylene terephthalate Polyethylene terephthalate Sulfate radical Sulfate radical
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| GB/T 7714 | Lin, Yinghui , Zhang, Yuehua , Wang, Yonghao et al. Efficient degradation and mineralization of polyethylene terephthalate microplastics by the synergy of sulfate and hydroxyl radicals in a heterogeneous electro-Fenton-activated persulfate oxidation system [J]. | JOURNAL OF HAZARDOUS MATERIALS , 2024 , 478 . |
| MLA | Lin, Yinghui et al. "Efficient degradation and mineralization of polyethylene terephthalate microplastics by the synergy of sulfate and hydroxyl radicals in a heterogeneous electro-Fenton-activated persulfate oxidation system" . | JOURNAL OF HAZARDOUS MATERIALS 478 (2024) . |
| APA | Lin, Yinghui , Zhang, Yuehua , Wang, Yonghao , Lv, Yuancai , Yang, Linyan , Chen, Zhijie et al. Efficient degradation and mineralization of polyethylene terephthalate microplastics by the synergy of sulfate and hydroxyl radicals in a heterogeneous electro-Fenton-activated persulfate oxidation system . | JOURNAL OF HAZARDOUS MATERIALS , 2024 , 478 . |
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