Co-treatment of landfill leachate with urban wastewater by chemical, physical and biological processes: Fenton oxidation preserves autochthonous bacterial community in the activated sludge process

Carluccio, Marco De; Sabatino, Raffaella; Eckert, Ester M.; Cesare, Andrea Di; Corno, Gianluca; Rizzo, Luigi

doi:10.1016/j.chemosphere.2022.137578

Cited by 16 publications

(5 citation statements)

References 43 publications

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“…Saprospirales can indeed be found in various environments, such as saline water, freshwater, soil, bioreactors, and wastewater treatment plants, as has been already mentioned in various studies [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 ]. In addition, air, plants, as well as terrestrial and saline water hosts are also potential environments for Saprospirales.…”

Section: Discussionmentioning

confidence: 80%

“…Furthermore, several studies have reported that Saprospirales members can be found in wastewater treatment plants, and especially in activated sludge and anaerobic ammonium oxidation reactors [23][24][25][26][27][28][29][30][31][32][33][34][35]. Regarding the latter, hydrolysis of proteins, denitrification, aromatic compound degradation, and organic matter decomposition are confirmed capabilities of certain bacteria belonging to the order Saprospirales [30,[32][33][34][35][36][37].…”

Section: Introductionmentioning

confidence: 94%

“…Bacteria belonging to Saprospirales can be found in natural ecosystems such as marine and freshwater environments, and soils [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 ]. Furthermore, several studies have reported that Saprospirales members can be found in wastewater treatment plants, and especially in activated sludge and anaerobic ammonium oxidation reactors [ 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 ]. Regarding the latter, hydrolysis of proteins, denitrification, aromatic compound degradation, and organic matter decomposition are confirmed capabilities of certain bacteria belonging to the order Saprospirales [ 30 , 32 , 33 , 34 , 35 , 36 , 37 ].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Large-Scale Integration of Amplicon Data Reveals Massive Diversity within Saprospirales, Mostly Originating from Saline Environments

Mourgela,

Kioukis,

Pourjam

et al. 2023

Microorganisms

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The order Saprospirales, a group of bacteria involved in complex degradation pathways, comprises three officially described families: Saprospiraceae, Lewinellaceae, and Haliscomenobacteraceae. These collectively contain 17 genera and 31 species. The current knowledge on Saprospirales diversity is the product of traditional isolation methods, with the inherited limitations of culture-based approaches. This study utilized the extensive information available in public sequence repositories combined with recent analytical tools to evaluate the global evidence-based diversity of the Saprospirales order. Our analysis resulted in 1183 novel molecular families, 15,033 novel molecular genera, and 188 K novel molecular species. Of those, 7 novel families, 464 novel genera, and 1565 species appeared in abundances at ≥0.1%. Saprospirales were detected in various environments, such as saline water, freshwater, soil, various hosts, wastewater treatment plants, and other bioreactors. Overall, saline water was the environment showing the highest prevalence of Saprospirales, with bioreactors and wastewater treatment plants being the environments where they occurred with the highest abundance. Lewinellaceae was the family containing the majority of the most prevalent species detected, while Saprospiraceae was the family with the majority of the most abundant species found. This analysis should prime researchers to further explore, in a more targeted way, the Saprospirales proportion of microbial dark matter.

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Section: Discussionmentioning

confidence: 80%

Section: Introductionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

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Large-Scale Integration of Amplicon Data Reveals Massive Diversity within Saprospirales, Mostly Originating from Saline Environments

Mourgela,

Kioukis,

Pourjam

et al. 2023

Microorganisms

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“…There were negative correlations between Tetrasphaera and Aquabacterium (Spearman's ρ = −0.94, p < 0.01) and Saccharimonadales and the unclassified_Saprospiraceae (Spearman's ρ = −0.93, p < 0.01). Among them, Tetrasphaera is a PAOs that uses organic matter as a carbon source to remove phosphorus through a fermentation pathway (Zhao et al, 2022); Aquabacterium belongs to denitrifying bacteria, and the content of organic carbon source directly determines its denitrification performance (Zhang et al, 2022); Saccharimonadales can hydrolyze organic P, but not without an organic carbon source (Wang et al, 2022); and unclassified_ Saprospiraceae play a crucial role in the degradation of organic compounds in AS processes (Carluccio et al, 2023). The metabolic processes of these four bacteria are inseparable from organic matter, so the negative correlation between them reflects the competitive role in organic matter utilization.…”

Section: Correlation Network Analysis Of Dominant Functional Bacteriamentioning

confidence: 99%

Deciphering the microbial community structures and functions of wastewater treatment at high-altitude area

Zhu

Liu²,

Chang³

et al. 2023

Front. Bioeng. Biotechnol.

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Introduction: The proper operation of wastewater treatment plants is a key factor in maintaining a stable river and lake environment. Low purification efficiency in winter is a common problem in high-altitude wastewater treatment plants (WWTPs), and analysis of the microbial community involved in the sewage treatment process at high-altitude can provide valuable references for improving this problem.Methods: In this study, the bacterial communities of high- and low-altitude WWTPs were investigated using Illumina high-throughput sequencing (HTS). The interaction between microbial community and environmental variables were explored by co-occurrence correlation network.Results: At genus level, Thauera (5.2%), unclassified_Rhodocyclaceae (3.0%), Dokdonella (2.5%), and Ferribacterium (2.5%) were the dominant genera in high-altitude group. The abundance of nitrogen and phosphorus removal bacteria were higher in high-altitude group (10.2% and 1.3%, respectively) than in low-altitude group (5.4% and 0.6%, respectively). Redundancy analysis (RDA) and co-occurrence network analysis showed that altitude, ultraviolet index (UVI), pH, dissolved oxygen (DO) and total nitrogen (TN) were the dominated environmental factors (p < 0.05) affecting microbial community assembly, and these five variables explained 21.4%, 20.3%, 16.9%, 11.5%, and 8.2% of the bacterial assembly of AS communities.Discussion: The community diversity of high-altitude group was lower than that of low-altitude group, and WWTPs of high-altitude aeras had a unique microbial community structure. Low temperature and strong UVI are pivotal factors contributing to the reduced diversity of activated sludge microbial communities at high-altitudes.

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“…The conventional biological treatment systems, i.e., both aerobic and anaerobic processes, are often ineffective in dealing with the difficult-to-degrade organic matter present in landfill leachate as these processes are primarily designed for easily degradable organic matters [6,10]. This is also supported by the fact that the biochemical oxygen demand (BOD 5 ) to COD ratio of landfill leachate is ≤0.4, which falls under the category of less biodegradable compounds [11]. Moreover, due to the excess chlorine ion concentration (8% to 11%) in leachate, it is difficult to treat using biological methods [12].…”

Section: Introductionmentioning

confidence: 99%

Synergistic Effects of Ionizing Radiation Process in the Integrated Coagulation–Sedimentation, Fenton Oxidation, and Biological Process for Treatment of Leachate Wastewater

Liu,

Sinharoy,

Lee

et al. 2023

Catalysts

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This study evaluated the feasibility of ionizing radiation combined with coagulation–sedimentation and Fenton oxidation as a treatment method for landfill leachate. The experiments revealed a positive correlation between pollutant removal efficiency and increased ionizing radiation intensity. Remarkable pollutant removal efficiencies were achieved under ionizing radiation at 50 kGy, with a maximum of 27% removal of total organic carbon (TOC), 61% removal of total nitrogen, 51% removal of total phosphorus, and an impressive 93% removal of NO3−-N. With the addition of coagulation–sedimentation and Fenton oxidation, the treatment efficiency further increased by 33% nitrogen, 18% SCOD, and 8% phosphate. The most significant observation from the study was that for all the different treatment methods, the results were always better for leachate samples treated with ionizing radiation than for the untreated samples. Subsequently, biological treatment was applied as a post-treatment method to remove residual organic carbon and nitrogen, which found that the best removal efficiencies were only for the low salt concentration (0.5%) and the removal decreased with increasing salt concentration. These experimental results conclusively demonstrated that when treating leachate wastewater, it was more appropriate to employ physicochemical methods rather than a biological treatment, primarily due to the high salt concentration present.

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Co-treatment of landfill leachate with urban wastewater by chemical, physical and biological processes: Fenton oxidation preserves autochthonous bacterial community in the activated sludge process

Cited by 16 publications

References 43 publications

Large-Scale Integration of Amplicon Data Reveals Massive Diversity within Saprospirales, Mostly Originating from Saline Environments

Large-Scale Integration of Amplicon Data Reveals Massive Diversity within Saprospirales, Mostly Originating from Saline Environments

Deciphering the microbial community structures and functions of wastewater treatment at high-altitude area

Synergistic Effects of Ionizing Radiation Process in the Integrated Coagulation–Sedimentation, Fenton Oxidation, and Biological Process for Treatment of Leachate Wastewater

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