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< Page ,Total 22 >
Performances and mechanisms of anaerobic nitrogen removal through Fe (III)/Fe (II) cycle with sponge iron biofilm without external iron addition SCIE
期刊论文 | 2024 , 66 | JOURNAL OF WATER PROCESS ENGINEERING
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Abstract :

Anaerobic ammonia oxidation coupled to Fe (III) reduction (Feammox) plays an important role in the natural nitrogen cycle. However, for its application in wastewater treatment process, the source of iron is a major limitation. In this study, Feammox process was successfully achieved without external iron addition using sponge iron biofilm. The products of Feammox process, nitrate and Fe (II), provided substrates for nitrate dependent ferrous oxidation (NDFO). Therefore, nitrogen removal and Fe (II)/Fe (III) cycle were achieved in reactor and nitrogen removal efficiency by Feammox and NDFO pathways was up to 58.4 %. The X-ray diffraction indicated the sludge contained magnetite and lepidocrocite, which provided Fe (III) for the occurrence of Feammox. Microorganisms related to Feammox process were dominated by Geothrix. It was found Feammox activity was similar at pH of 8 and 7, while inhibited at pH of 6, which was caused by the decrease of Feammox bacteria. And Feammox activity decreased with the decrease of temperature, in which the ammonia removal rate was 2 times faster at 30 degrees C than at 10 degrees C. Under micro-oxygen aeration, the ammonia removal rate improved and Feammox and NDFO processes still played roles in system, nevertheless, under high dissolved oxygen condition, Feammox bacteria-Geothrix and NDFO bacteria Thiobacillus would be gradually eliminated from the system.

Keyword :

Microbial community Microbial community Influence factors Influence factors Nitrate dependent ferrous oxidation Nitrate dependent ferrous oxidation Fe (II)/Fe (III) cycle Fe (II)/Fe (III) cycle Feammox Feammox

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GB/T 7714 Li, Jianmin , Zeng, Wei , Zhan, Mengjia et al. Performances and mechanisms of anaerobic nitrogen removal through Fe (III)/Fe (II) cycle with sponge iron biofilm without external iron addition [J]. | JOURNAL OF WATER PROCESS ENGINEERING , 2024 , 66 .
MLA Li, Jianmin et al. "Performances and mechanisms of anaerobic nitrogen removal through Fe (III)/Fe (II) cycle with sponge iron biofilm without external iron addition" . | JOURNAL OF WATER PROCESS ENGINEERING 66 (2024) .
APA Li, Jianmin , Zeng, Wei , Zhan, Mengjia , Miao, Haohao , Hao, Xiaojing . Performances and mechanisms of anaerobic nitrogen removal through Fe (III)/Fe (II) cycle with sponge iron biofilm without external iron addition . | JOURNAL OF WATER PROCESS ENGINEERING , 2024 , 66 .
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Isotope analysis of nitrogen removal pathways and N2O production potential in the SDAD-anammox system under different N/S ratios SCIE
期刊论文 | 2024 , 24 | WATER RESEARCH X
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Abstract :

This study explored the impact of varying nitrate to sulfide (N/S) ratios on nitrogen removal efficiency (NRE) in the sulfide-driven autotrophic denitrification and anammox (SDAD-anammox) system. Optimal nitrogen removal was observed at N/S ratios between 1.5 and 2.0. Isotope tracing results showed that the contribution of anammox to nitrogen removal was enhanced with increasing N/S ratios, reaching up to 37 % at the N/S ratio of 2.5. Additionally, complex nitrogen pathways were identified, including dissimilatory nitrate reduction to ammonium (DNRA). Furthermore, isotope tracing was innovatively applied to investigate N2O emissions, demonstrating that higher N/S ratios significantly reduced N2O emissions, with the lowest emissions at N/S ratio of 2.5. Gene expression analysis indicated that nitrogen and sulfide transformation genes decreased with increasing N/S ratios, while anammox-related genes first increased and then decreased, reflecting the system's microbial dynamics. These findings offer insights into nitrogen transformation pathways and N2O production mechanisms in the SDAD-anammox process.

Keyword :

Denitrification desulfurization system Denitrification desulfurization system Nitrous oxide Nitrous oxide Anammox Anammox Functional gene Functional gene Isotope effect Isotope effect

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GB/T 7714 Zhan, Mengjia , Zeng, Wei , Hao, Xiaojing et al. Isotope analysis of nitrogen removal pathways and N2O production potential in the SDAD-anammox system under different N/S ratios [J]. | WATER RESEARCH X , 2024 , 24 .
MLA Zhan, Mengjia et al. "Isotope analysis of nitrogen removal pathways and N2O production potential in the SDAD-anammox system under different N/S ratios" . | WATER RESEARCH X 24 (2024) .
APA Zhan, Mengjia , Zeng, Wei , Hao, Xiaojing , Miao, Haohao , Lu, Yao , Jiang, Wenzhuo et al. Isotope analysis of nitrogen removal pathways and N2O production potential in the SDAD-anammox system under different N/S ratios . | WATER RESEARCH X , 2024 , 24 .
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Anaerobic recovery of vivianite from waste-activated sludge through combined sludge pre-fermentation and agroforestry biomass-based biochar SCIE
期刊论文 | 2024 , 190 , 381-394 | PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
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Abstract :

The recovery of vivianite through the anaerobic digestion of waste-activated sludge has attracted considerable attention due to its operational simplicity and the high economic value of vivianite. This study concentrated on the recovery of vivianite from anaerobic fermentation systems through a strategy combining sludge pre- fermentation with the waste agricultural and forestry biomass-derived biochar (ZBC). In-depth analyses of the structure and functionality of ZBC were conducted using techniques such as Fourier-transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy. The sediment produced after the experiment and the changes in microbial community composition were characterized. The results indicated that pre-fermentation promoted phosphorus release, enhancing the synthesis of vivianite while selectively enriching respiratory and fermentative Fe (III)-reducing microorganisms. When FeOOH was used as the Fe (III) source, ZBC, through its dual action of redox functional groups and graphitization structure, increased the Fe2+ production by 243.6 % in the system dominated by respiratory Fe (III)-reducing bacteria. The optimal dosage of ZBC for the simultaneous recovery of vivianite resources and methane energy was 2.5 g/L. The combined application of pre-fermentation and ZBC provides a novel approach for the efficient recycling of vivianite and offers new insights into the reuse of agroforestry waste biomass resources.

Keyword :

Pre-fermentation Pre-fermentation Phosphate recovery Phosphate recovery Vivianite Vivianite Biochar Biochar Respiratory Fe (III) reduction Respiratory Fe (III) reduction

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GB/T 7714 Lu, Sijia , Zeng, Wei , Gong, Qingteng et al. Anaerobic recovery of vivianite from waste-activated sludge through combined sludge pre-fermentation and agroforestry biomass-based biochar [J]. | PROCESS SAFETY AND ENVIRONMENTAL PROTECTION , 2024 , 190 : 381-394 .
MLA Lu, Sijia et al. "Anaerobic recovery of vivianite from waste-activated sludge through combined sludge pre-fermentation and agroforestry biomass-based biochar" . | PROCESS SAFETY AND ENVIRONMENTAL PROTECTION 190 (2024) : 381-394 .
APA Lu, Sijia , Zeng, Wei , Gong, Qingteng , Zhang, Jiayu , Peng, Xiaojing , Yu, Xintian et al. Anaerobic recovery of vivianite from waste-activated sludge through combined sludge pre-fermentation and agroforestry biomass-based biochar . | PROCESS SAFETY AND ENVIRONMENTAL PROTECTION , 2024 , 190 , 381-394 .
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Integration of mixotrophic denitrification and anammox in Thiothrix-hydroxyapatite coupled particles treating municipal wastewater against low temperature and organic load shocks SCIE
期刊论文 | 2024 , 497 | CHEMICAL ENGINEERING JOURNAL
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Abstract :

Sulfur-driven autotrophic denitrification coupled with anammox (SPDA) is a promising process for autotrophic nitrogen removal, but autotrophic microorganisms are challenging to retain in wastewater treatment units. In this study, a single-stage mixotrophic denitrification coupled with anammox (MDA) process was established in an up-flow anaerobic sludge bed reactor with Thiothrix-hydroxyapatite coupled particles. The advancement of the sludge granulation process effectively strengthened the resistance of the MDA system to environmental stresses, and the SPDA-dominated nitrogen removal process achieved a total nitrogen removal efficiency of 88.6 %, a nitrogen removal rate of 0.432 KgN/m3/d at temperatures as low as 12.8 degrees C and an organic loading rate of 0.63 KgCOD/m3/d. Interestingly, the ecological niche integration of sulfur oxidizing bacteria (SOB), anammox bacteria and heterotrophic denitrifying bacteria in the granular sludge was observed during long-term operation. The FISH-CLSM results revealed the spatial distribution of functional microorganisms in the granular sludge and the potential pollutant transformation mechanism. The aggressive growth of SOB dominated by Thiothrix constructed a biological wall at the periphery of the granules, which ensured their priority for nitrate acquisition, supplied nitrite to the internal anammox bacteria, and acted as an important barrier against the shock of organic loads. Overall, this study presents a novel granulation approach for the biological treatment of sulfur-containing wastewater, highlighting the efficacy of functional integration within Thiothrix-hydroxyapatite coupled particles as an effective strategy to resist environmental stress.

Keyword :

Thiothrix -hydroxyapatite coupled particles Thiothrix -hydroxyapatite coupled particles Mixotrophic denitrification Mixotrophic denitrification Environmental stress Environmental stress Function integration Function integration Anammox Anammox

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GB/T 7714 Gong, Qingteng , Zeng, Wei , Meng, Qingan et al. Integration of mixotrophic denitrification and anammox in Thiothrix-hydroxyapatite coupled particles treating municipal wastewater against low temperature and organic load shocks [J]. | CHEMICAL ENGINEERING JOURNAL , 2024 , 497 .
MLA Gong, Qingteng et al. "Integration of mixotrophic denitrification and anammox in Thiothrix-hydroxyapatite coupled particles treating municipal wastewater against low temperature and organic load shocks" . | CHEMICAL ENGINEERING JOURNAL 497 (2024) .
APA Gong, Qingteng , Zeng, Wei , Meng, Qingan , Hao, Xiaojing , Lu, Sijia , Wang, Yifei et al. Integration of mixotrophic denitrification and anammox in Thiothrix-hydroxyapatite coupled particles treating municipal wastewater against low temperature and organic load shocks . | CHEMICAL ENGINEERING JOURNAL , 2024 , 497 .
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Integrated process of Tetrasphaera-dominated-dominated in-situ waste activated sludge fermentation, biological phosphorus removal and endogenous denitrification in single reactor for treatment of wastewater with limited carbon sources SCIE
期刊论文 | 2024 , 412 | BIORESOURCE TECHNOLOGY
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Abstract :

An integrated process of sludge in-situ fermentation, biological phosphorus removal and endogenous denitrification (ISFPR-ED) was developed to treat low ratio of chemical oxygen demand to nitrogen (COD/N) wastewater and waste activated sludge (WAS) in a single reactor. Nutrient removal and WAS reduction were achieved due to Tetrasphaera-dominated sludge fermentation provided organic carbon in extending the anaerobic duration. The WAS reduction efficiency, effluent orthophosphate (PO43--P) and total inorganic nitrogen reached 28.1 %, less than 0.4 and 7.2 mg/L, respectively. While organic carbon was reduced by 67 %. Tetrasphaera, conventional polyphosphate accumulating organisms (PAOs) stored glycogen, amino acids, and PHA for nutrient removal. Excess energy from fermentation enhanced anaerobic PO43--P uptake by Tetrasphaera. Tetrasphaera was the dominant PO43--P removal and fermentation bacteria, working synergistically with conventional PAOs and fermenting microorganisms. This integrated process improves nutrient removal efficiency and reduces operating costs for carbon addition and WAS disposal in wastewater treatment.

Keyword :

Tetrasphaera Tetrasphaera Sludge reduction Sludge reduction Biological nutrient removal Biological nutrient removal Waste activated sludge Waste activated sludge

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GB/T 7714 Liu, Hongjun , Zeng, Wei , Wu, Lei et al. Integrated process of Tetrasphaera-dominated-dominated in-situ waste activated sludge fermentation, biological phosphorus removal and endogenous denitrification in single reactor for treatment of wastewater with limited carbon sources [J]. | BIORESOURCE TECHNOLOGY , 2024 , 412 .
MLA Liu, Hongjun et al. "Integrated process of Tetrasphaera-dominated-dominated in-situ waste activated sludge fermentation, biological phosphorus removal and endogenous denitrification in single reactor for treatment of wastewater with limited carbon sources" . | BIORESOURCE TECHNOLOGY 412 (2024) .
APA Liu, Hongjun , Zeng, Wei , Wu, Lei , Meng, Qingan , Zhang, Jiayu , Peng, Yongzhen . Integrated process of Tetrasphaera-dominated-dominated in-situ waste activated sludge fermentation, biological phosphorus removal and endogenous denitrification in single reactor for treatment of wastewater with limited carbon sources . | BIORESOURCE TECHNOLOGY , 2024 , 412 .
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Enhancing anaerobic ammonium oxidation via polymeric ferric sulfate (PFS)-Mediated dual-electron Acceptor: A solution to nitrite deficiency SCIE
期刊论文 | 2024 , 498 | CHEMICAL ENGINEERING JOURNAL
WoS CC Cited Count: 1
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Abstract :

In addressing the issue of the unstable supply of electron acceptors (nitrite) during Anammox, researchers have often overlooked that the electron transfer process in anammox bacteria (AnAOB) is not restricted to the intracellular, extracellular electron transfer can also serve as an alternative pathway. This study utilized Fe3+ as an adjunctive electron acceptor, coupling Anammox with ferric iron reduction (Feammox) by introducing polymeric ferric sulfate (PFS) in the Anammox system. This approach achieved effective nitrogen removal even when nitrite was deficient. At a NO2--N to NH4+-N ratio of 0.5, the Feammox-Anammox combined system maintained stable nitrogen removal under the dual electron acceptor, with total nitrogen and NH4+-N removal efficiency of 85 % and 91 %, respectively. The contribution of Feammox and Anammox to NH4+-N removal was 45 % and 55 %, respectively. TEM-EDS confirmed the presence of iron elements across the periphery, periplasm, and cytoplasm of AnAOB, suggesting the involvement of PFS in the metabolic and electron transfer processes. Notably, the introduction of Fe3+ and the limitation of nitrite availability resulted in increased relative abundances of FeOB (Thermomonas) and FeRB (Ignavibacterium) to 30 % and 3.6 %, respectively, indicating that the electron transfer process with Fe3+ as the electron acceptor was continuously intensified, as well as a cycle of Fe3+ / Fe2+ was established. Due to unique nitrogen metabolism mode and high Fe3+ tolerance, the abundance of Candidatus_Brocadia was enriched up to 7.2 %, which alternately dominated the Anammox process with Candidatus_Kuenenia, providing favorable conditions for AnAOB to carry out the extracellular electron transfer process. These findings provide a novel strategy for improving the stability and efficiency of the Anammox process under deficient nitrite supply.

Keyword :

Extracellular electron transfer Extracellular electron transfer Dual electron acceptor Dual electron acceptor Feammox Feammox Anammox Anammox Polymeric ferric sulfate Polymeric ferric sulfate

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GB/T 7714 Wang, Yifei , Zeng, Wei , Gong, Qingteng et al. Enhancing anaerobic ammonium oxidation via polymeric ferric sulfate (PFS)-Mediated dual-electron Acceptor: A solution to nitrite deficiency [J]. | CHEMICAL ENGINEERING JOURNAL , 2024 , 498 .
MLA Wang, Yifei et al. "Enhancing anaerobic ammonium oxidation via polymeric ferric sulfate (PFS)-Mediated dual-electron Acceptor: A solution to nitrite deficiency" . | CHEMICAL ENGINEERING JOURNAL 498 (2024) .
APA Wang, Yifei , Zeng, Wei , Gong, Qingteng , Zhan, Mengjia , Hao, Xiaojing , Peng, Yongzhen . Enhancing anaerobic ammonium oxidation via polymeric ferric sulfate (PFS)-Mediated dual-electron Acceptor: A solution to nitrite deficiency . | CHEMICAL ENGINEERING JOURNAL , 2024 , 498 .
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Metabolomic pathway regulation to achieve optimal control of inorganic carbon in anammox process SCIE
期刊论文 | 2023 , 855 | SCIENCE OF THE TOTAL ENVIRONMENT
WoS CC Cited Count: 2
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Abstract :

The significance of inorganic carbon (IC) for anaerobic ammonium oxidation (anammox) bacteria has been verified. However, the regulation of metabolic pathways under IC stress is not clear, limiting the optimization of IC supply. In this study, the regulatory pathways at IC concentration of 5-150 mg/L were explored to achieve optimal control of IC. The results show that the changes of metabolic pathway under IC stress determined anammox characteristics. At IC concentration of 5 mg/L, the anammox activity distinctly decreased due to the guanosine tetraphosphate (ppGpp) -mediated regulation under IC limitation. With less than 15 mg/L of IC, the decrease of carbon fixation limited the biosynthesis of gluconeogenesis and amino acids, causing the decline of extracellular polymeric substance synthesis. With more than 50 mg/L of IC, the improvement of purine and pyrimidine metabolism enhanced the electron transport capacity and growth potential of anammox bacteria. This study provides metabolic insights into IC influence on anammox consortia and a novel method of IC concentration optimization using metabolomics analysis.

Keyword :

Metabolomics Metabolomics Inorganic carbon Inorganic carbon Anaerobic ammonium oxidation Anaerobic ammonium oxidation Extracellular polymeric substance (EPS) Extracellular polymeric substance (EPS)

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GB/T 7714 Ma, Chenyang , Zeng, Wei , Li, Jianmin et al. Metabolomic pathway regulation to achieve optimal control of inorganic carbon in anammox process [J]. | SCIENCE OF THE TOTAL ENVIRONMENT , 2023 , 855 .
MLA Ma, Chenyang et al. "Metabolomic pathway regulation to achieve optimal control of inorganic carbon in anammox process" . | SCIENCE OF THE TOTAL ENVIRONMENT 855 (2023) .
APA Ma, Chenyang , Zeng, Wei , Li, Jianmin , Meng, Qingan , Peng, Yongzhen . Metabolomic pathway regulation to achieve optimal control of inorganic carbon in anammox process . | SCIENCE OF THE TOTAL ENVIRONMENT , 2023 , 855 .
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A novel process for simultaneous biological nutrient removal and waste activated sludge reduction in one-stage system without aeration SCIE
期刊论文 | 2023 , 454 | CHEMICAL ENGINEERING JOURNAL
WoS CC Cited Count: 7
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This study presented a novel process for simultaneous biological nutrient removal and waste activated sludge reduction in one-stage municipal wastewater treating system without aeration on the basis of endogenous partial denitrification, anammox and Candidatus Phosphoribacter dominated biological phosphate removal with sludge reduction (EPDA/PSR). The effluent total inorganic nitrogen and phosphate concentrations were 0.1 mg/L and lower than detection limit (0.1 mg/L), respectively, without dosing external carbon sources. Compared with partial denitrification-anammox process, the daily sludge production in EPDA/PSR process reduced by 50.8 %. The percentage of intact cells measured by flow cytometry reduced from 92.4 % to 77.3 % with the increase of aromatic protein, DNA content of supernatant, soluble microbial byproduct-like substance and decline of particle size. The sludge stabilization structure was destructed, and intracellular organics were released, which resulted in the reduction of sludge production. Microbial community structure at transcriptional level indicated that really working Candidatus Phosphoribacter (phosphorus accumulating organisms with fermentation capacity), Candidatus Competibacter (endogenous partial denitrification bacteria) and Candidatus Brocadia (anammox bacteria) reached 68.4 %, 9.84 % and 8.02 %, respectively, and Candidatus Kuenenia (anammox bacteria) did not play a role in EPDA/PSR system. The novel one-stage EPDA/PSR process realized high efficient biological nutrient removal, achieved waste activated sludge reduction and saved 100 % of aeration energy consumption cost and external carbon source dosage cost, which effectively developed internal carbon source and provided a new idea for wastewater treatment.

Keyword :

Biological phosphate removal Biological phosphate removal Nutrient removal Nutrient removal Anammox Anammox Biological wastewater treatment Biological wastewater treatment Endogenous partial denitrification Endogenous partial denitrification

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GB/T 7714 Fan, Zhiwei , Zeng, Wei , Jia, Yuan et al. A novel process for simultaneous biological nutrient removal and waste activated sludge reduction in one-stage system without aeration [J]. | CHEMICAL ENGINEERING JOURNAL , 2023 , 454 .
MLA Fan, Zhiwei et al. "A novel process for simultaneous biological nutrient removal and waste activated sludge reduction in one-stage system without aeration" . | CHEMICAL ENGINEERING JOURNAL 454 (2023) .
APA Fan, Zhiwei , Zeng, Wei , Jia, Yuan , Meng, Qingan , Liu, Hongjun , Liu, Hong et al. A novel process for simultaneous biological nutrient removal and waste activated sludge reduction in one-stage system without aeration . | CHEMICAL ENGINEERING JOURNAL , 2023 , 454 .
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Revealing the ammonia oxidation process and shortcut nitrification performance using nitrogen and oxygen isotope fractionation effect SCIE
期刊论文 | 2023 , 912 | SCIENCE OF THE TOTAL ENVIRONMENT
WoS CC Cited Count: 1
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Natural abundance isotope fractionation properties have become the most effective way to explore nitrogen transformations of biological nitrogen removal from wastewater. The migration and transformation characteristics of N and O elements in the shortcut nitrification were analyzed using the N and O dual isotopic fractionation technique. The effects of dissolved oxygen (DO) and temperature changes on the performance of shortcut nitrification and isotopic fractionation were investigated. The fractionation characteristics of N and O elements during shortcut nitrification were explored by adjusting DO concentration (0.2-0.4, 1-1.2 and 3-4 mg/L) and temperature (33 +/- 1 degrees C, 25 +/- 1 degrees C and 18 +/- 1 degrees C). Both delta N-15(NO2) and delta O-18(NO2) showed a gradually increasing trend with the accumulation of NO2--N, and the fractionation effects induced by temperature were significantly higher than those by DO. The higher the temperature, the more significant the increase in delta N-15(NO2); the higher the DO, the more remarkable the increase in delta O-18(NO2), while delta N-15(NO2): delta O-18(NO2) was maintained at 0.77-6.45. The O-18-labeled H2O was successfully transferred to NO2--N, and the replacement of O element was as high as 100 %, indicating that DO and H2O simultaneously participated in the shortcut nitrification process. The dynamic changes in isotope fractionation effects can be successfully applied to reveal the performance and mechanism of shortcut nitrification.

Keyword :

Domestic wastewater Domestic wastewater Nitrification performance Nitrification performance O-18-labeled H2O O-18-labeled H2O Shortcut nitrification Shortcut nitrification Dual isotopes fractionation Dual isotopes fractionation

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GB/T 7714 Liu, Hong , Zeng, Wei , Zhan, Mengjia et al. Revealing the ammonia oxidation process and shortcut nitrification performance using nitrogen and oxygen isotope fractionation effect [J]. | SCIENCE OF THE TOTAL ENVIRONMENT , 2023 , 912 .
MLA Liu, Hong et al. "Revealing the ammonia oxidation process and shortcut nitrification performance using nitrogen and oxygen isotope fractionation effect" . | SCIENCE OF THE TOTAL ENVIRONMENT 912 (2023) .
APA Liu, Hong , Zeng, Wei , Zhan, Mengjia , Li, Jianmin . Revealing the ammonia oxidation process and shortcut nitrification performance using nitrogen and oxygen isotope fractionation effect . | SCIENCE OF THE TOTAL ENVIRONMENT , 2023 , 912 .
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Sulfide inhibition on polyphosphate accumulating organisms and glycogen accumulating organisms: Cumulative inhibitory effect and recoverability SCIE
期刊论文 | 2023 , 451 | JOURNAL OF HAZARDOUS MATERIALS
WoS CC Cited Count: 7
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Sulfate in wastewater can be reduced to sulfide and its impact on the stability of enhanced biological phosphorus removal (EBPR) is still unclear. In this study, the metabolic changes and subsequent recovery of polyphosphate accumulating organisms (PAOs) and glycogen accumulating organisms (GAOs) were investigated at different sulfide concentrations. The results showed that the metabolic activity of PAOs and GAOs was mainly related to H2S concentration. Under anaerobic conditions, the catabolism of PAOs and GAOs was promoted at H2S concentrations below 79 mg/L S and 271 mg/L S, respectively, and inhibited above these concentrations; whereas anabolism was consistently inhibited in the presence of H2S. The phosphorus (P) release was also pH-dependent due to the intracellular free Mg2+ efflux from PAOs. H2S was more destructive to the esterase activity and membrane permeability of PAOs than those of GAOs and prompted intracellular free Mg2+ efflux of PAOs, resulting in worse aerobic metabolism and subsequent recovery of PAOs than GAOs. Additionally, sulfides facilitated the production of extracellular polymeric substances (EPS), especially tightly bound EPS. The amount of EPS in GAOs was significantly higher than that in PAOs. The above results indicated that sulfide had a stronger inhibition to PAOs than GAOs, and when sulfide was present, GAOs had a competitive advantage over PAOs in EBPR.

Keyword :

Anaerobic metabolism Anaerobic metabolism Sulfide inhibition Sulfide inhibition IntracellularMg2+ IntracellularMg2+ Enhanced biological phosphorus removal Enhanced biological phosphorus removal Flow cytometry Flow cytometry

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GB/T 7714 Meng, Qingan , Zeng, Wei , Fan, Zhiwei et al. Sulfide inhibition on polyphosphate accumulating organisms and glycogen accumulating organisms: Cumulative inhibitory effect and recoverability [J]. | JOURNAL OF HAZARDOUS MATERIALS , 2023 , 451 .
MLA Meng, Qingan et al. "Sulfide inhibition on polyphosphate accumulating organisms and glycogen accumulating organisms: Cumulative inhibitory effect and recoverability" . | JOURNAL OF HAZARDOUS MATERIALS 451 (2023) .
APA Meng, Qingan , Zeng, Wei , Fan, Zhiwei , Li, Shuangshuang , Peng, Yongzhen . Sulfide inhibition on polyphosphate accumulating organisms and glycogen accumulating organisms: Cumulative inhibitory effect and recoverability . | JOURNAL OF HAZARDOUS MATERIALS , 2023 , 451 .
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