Metabolic insights into the enhanced nitrogen removal of anammox by montmorillonite at reduced temperature

Yang, Xuetong; Zhou, Jianhang; Huo, Tangran; Lv, Yanna; Pan, Juejun; Chen, Liming; Tang, Xi; Zhao, Yunpeng; Liu, Hailong; Gao, Qiang; Liu, Sitong

doi:10.1016/j.cej.2020.128290

Cited by 45 publications

(7 citation statements)

References 80 publications

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“…Interestingly, riboflavin metabolism, histidine metabolism, and ascorbate and aldarate metabolism were significantly perturbed under all three PS feeding conditions (Figure d–f). Riboflavin could provide more electron shuttles and redox mediators that facilitated the extracellular electron transfer. , Histidine metabolism was associated with a series of metabolic pathways, including the pentose phosphate pathway, alanine metabolism, and glutamate metabolism . Therefore, comparative metabolomic analysis implied that innate metabolic mechanisms in the mealworm intestines could coordinate redox capability to complete biodegradation of PS polymers with different MWs synergistically.…”

Section: Resultsmentioning

confidence: 99%

“…45,46 Histidine metabolism was associated with a series of metabolic pathways, including the pentose phosphate pathway, alanine metabolism, and glutamate metabolism. 47 Therefore, comparative metabolomic analysis implied that innate metabolic mechanisms in the mealworm intestines could coordinate redox capability to complete biodegradation of PS polymers with different MWs synergistically. These findings also revealed that the mealworms might use their endogenous metabolic material reserves to compensate for the lack of nutrients, thus performing PS depolymerization and biodegradation processes.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

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Influence of Polymer Size on Polystyrene Biodegradation in Mealworms (Tenebrio molitor): Responses of Depolymerization Pattern, Gut Microbiome, and Metabolome to Polymers with Low to Ultrahigh Molecular Weight

Peng

Sun

Xiao

et al. 2022

Environ. Sci. Technol.

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Biodegradation of polystyrene (PS) in mealworms (Tenebrio molitor lavae) has been identified with commercial PS foams. However, there is currently limited understanding of the influence of molecular weight (MW) on insect-mediated plastic biodegradation and the corresponding responses of mealworms. In this study, we provided the results of PS biodegradation, gut microbiome, and metabolome by feeding mealworms with highpurity PS microplastics with a wide variety of MW. Over 24 days, mealworms (50 individuals) fed with 0.20 g of PS showed decreasing removal of 74.1

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Section: Resultsmentioning

confidence: 99%

Section: ■ Materials and Methodsmentioning

confidence: 99%

Influence of Polymer Size on Polystyrene Biodegradation in Mealworms (Tenebrio molitor): Responses of Depolymerization Pattern, Gut Microbiome, and Metabolome to Polymers with Low to Ultrahigh Molecular Weight

Peng

Sun

Xiao

et al. 2022

Environ. Sci. Technol.

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“…The composite carriers based on zeolite could probably promote the metabolism of AOB and limit the activity of NOB ( Lv et al, 2019 ). Montmorillonite could catalyze nucleic synthesis and may also play a role in the formation of primitive lipid-based membranes ( Yang et al, 2021 ). However, these carriers are relatively high cost and exhibit weak adsorption to microorganisms, resulting in insufficient microbial enrichment ( Bernal et al, 1993 ; Zhang et al, 2016 ; Yang et al, 2021 ).…”

Section: Introductionmentioning

confidence: 99%

“…Montmorillonite could catalyze nucleic synthesis and may also play a role in the formation of primitive lipid-based membranes ( Yang et al, 2021 ). However, these carriers are relatively high cost and exhibit weak adsorption to microorganisms, resulting in insufficient microbial enrichment ( Bernal et al, 1993 ; Zhang et al, 2016 ; Yang et al, 2021 ). As a natural ore, sepiolite exhibits the largest specific surface area among natural nonmetallic ores, reaching 900 m 2 /g ( Nagy and Bradley, 1955 ; Alvarez, 1984 ; Galán, 1996 ).…”

Section: Introductionmentioning

confidence: 99%

Comparison of Different Carriers to Maintain a Stable Partial Nitrification Process for Low-Strength Wastewater Treatment

Zhang

Liu

2022

Front. Bioeng. Biotechnol.

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Practical application of the partial nitritation–anaerobic ammonium oxidation (anammox) process has attracted increasing attention because of its low operational costs. However, the nitritation process, as a promising way to supply nitrite for anammox, is sensitive to the variations in substrate concentration and dissolved oxygen (DO) concentration. Therefore, a stable supply of nitrite becomes a real bottleneck in partial nitritation–anammox process, limiting their potential for application in mainstream wastewater treatment. In this study, five 18-L sequencing batch reactors were operated in parallel at room temperature (22°C ± 4°C) to explore the nitritation performance with different carrier materials, including sepiolite-nonwoven carrier (R1), zeolite-nonwoven carrier (R2), brucite-nonwoven carrier (R3), polyurethane carrier (R4), and nonwoven carrier (R5). The ammonia oxidation rate (AOR) in R1 reached the highest level of 0.174 g-N L−1 d−1 in phase II, which was 1.4-fold higher than the control reactor (R4). To guarantee a stable supply of nitrite for anammox process, the nitrite accumulation efficiency (NAE) was always higher than 77%, even though the free ammonia (FA) decreases to 0.08 mg-N/L, and the pH decreases to 6.8 ± 0.3. In phase V, the AOR in R1 reached 0.206 g-N L−1 d−1 after the DO content increase from 0.7 ± 0.3 mg/L to 1.7 ± 0.3 mg/L. The NAE in R1 was consistently higher than 68.6%, which was much higher than the other reactor systems (R2: 43.8%, R3: 46.6%, R4: 23.7%, R5: 22.7%). Analysis of 16S rRNA gene sequencing revealed that the relative abundance of Nitrobacter and Nitrospira in R1 was significantly lower than other reactors, indicating that the sepiolite carrier plays an important role in the inhibition of nitrite-oxidizing bacteria. These results indicate that the sepiolite nonwoven composite carrier can effectively improve the nitritation process, which is highly beneficial for the application of partial nitritation–anammox for mainstream wastewater treatment.

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“…Extensive treatments targeting the specific compounds, including advanced physical, chemical, biological and/or combination of them, are therefore necessary prior to discharge to reduce damage to environment and human health. New techniques for wastewater purification are constantly being improved [ 3 , 4 , 5 ]. Microbial treatment technologies are considered as the “next-generation ecological ditches” as they are considered effective and economical for the simultaneous removal of N, phosphorus (P) and heavy metals from wastewaters such as the textile [ 6 , 7 , 8 , 9 ].…”

Section: Introductionmentioning

confidence: 99%

Microbial community and performance of a partial nitritation/anammox sequencing batch reactor treating textile wastewater

Clagnan

Brusetti

Pioli

et al. 2021

Heliyon

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Implementation of onsite bioremediation technologies is essential for textile industries due to rising concerns in terms of water resources and quality. Partial nitritation-anaerobic ammonium oxidation (PN/A) processes emerged as a valid, but unexplored, solution. In this study, the performance of a PN/A pilot-scale (9 m 3 ) sequencing batch reactor treating digital textile printing wastewater (10–40 m 3 d −1 ) was monitored by computing nitrogen (N) removal rate and efficiencies. Moreover, the structure of the bacterial community was assessed by next generation sequencing and quantitative polymerase chain reaction (qPCR) analyses of several genes, which are involved in the N cycle. Although anaerobic ammonium oxidation activity was inhibited and denitrification occurred, N removal rate increased from 16 to 61 mg N g VSS −1 d −1 reaching satisfactory removal efficiency (up to 70%). Ammonium (18–70 mg L −1 ) and nitrite (16–82 mg L −1 ) were detected in the effluent demonstrating an unbalance between the aerobic and anaerobic ammonia oxidation activity, while constant organic N was attributed to recalcitrant azo dyes. Ratio between nitrification and anammox genes remained stable reflecting a constant ammonia oxidation activity. A prevalence of ammonium oxidizing bacteria and denitrifiers suggested the presence of alternative pathways. PN/A resulted a promising cost-effective alternative for textile wastewater N treatment as shown by the technical-economic assessment. However, operational conditions and design need further tailoring to promote the activity of the anammox bacteria.

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Metabolic insights into the enhanced nitrogen removal of anammox by montmorillonite at reduced temperature

Cited by 45 publications

References 80 publications

Influence of Polymer Size on Polystyrene Biodegradation in Mealworms (Tenebrio molitor): Responses of Depolymerization Pattern, Gut Microbiome, and Metabolome to Polymers with Low to Ultrahigh Molecular Weight

Influence of Polymer Size on Polystyrene Biodegradation in Mealworms (Tenebrio molitor): Responses of Depolymerization Pattern, Gut Microbiome, and Metabolome to Polymers with Low to Ultrahigh Molecular Weight

Comparison of Different Carriers to Maintain a Stable Partial Nitrification Process for Low-Strength Wastewater Treatment

Microbial community and performance of a partial nitritation/anammox sequencing batch reactor treating textile wastewater

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