Reduction of antibiotic resistance genes under different conditions during composting process of aerobic combined with anaerobic

Li, Houyu; Zheng, Xiangqun; Cao, Haoyu; Tan, Lu; Yang, Bo; Cheng, Weimin; Xu, Yan

doi:10.1016/j.biortech.2021.124710

Cited by 26 publications

(2 citation statements)

References 47 publications

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“…Ferruginibacter was found to be tolerant to the inhibition effect of aniline and played an important role in pollutant reduction [32]. Truepera had a significant effect on changes in the abundance of ARGs in the system [33]. Nitrobacter, a key NOB, was the dominating genera with approximately 2.84% and 2.81% relative abundance in both R1 and R2 samples, respectively, where only 0.56% of which thrived in R3.…”

Section: Biofilm Microbial Communitiesmentioning

confidence: 99%

Nitrogen removal and metabolic pathways of nitrifying coal ash propelled by temperature change under high nitrogen loading

Liu

Xin

Liu³

et al. 2022

Environmental Engineering Research

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Coal ash, owing to its cost-effectiveness and greater adhesion with nitrifiers, has been used as a carrier for immobilizing nitrifiers when treating wastewater with a low C/N ratio and high nitrogen loading. Various environmental conditions significantly affect the nitrogen metabolic pathways of nitrifying coal ash. In this study, the nitrogen metabolic pathways of nitrifying coal ash propelled at different temperatures were investigated to evaluate the impact of seasonal variation on nitrifying coal ash. Results showed average NH4 + -N effluent concentrations increased with temperature, and reached 3.37, 5.16, and 76.06 mg N/L with 1158 mg N/L influent under 15 ℃, 25 ℃, and 35 ℃ systems. The total nitrogen removal rate at a cooling temperature of 15 ℃ was higher than that at 25 ℃ and 35 ℃. Further analysis showed Nitrosomonas and Nitrobacter were enhanced, whereas a significant evolution of autotrophic denitrifiers, Acidovorax, was enriched at 15 ℃. An in-depth investigation of N-metabolism pathways suggested higher temperatures of 25 ℃ and 35 ℃ reduced the abundance of key genes involved in ammonia oxidation (amoABC, hao) and nitrite oxidation (narGH). Network analysis between N-metabolic functional genes and genera presented stronger relevance and richer sources between nitrifiers/denitrifiers and nitrification/denitrification-associated genes under cooler temperatures.

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Section: Biofilm Microbial Communitiesmentioning

confidence: 99%

Nitrogen removal and metabolic pathways of nitrifying coal ash propelled by temperature change under high nitrogen loading

Liu

Xin

Liu³

et al. 2022

Environmental Engineering Research

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“…Then, an increasing number of studies have been conducted on co-composting to improve composting quality by adding amendments. For instance, the addition of straw and tail vegetables can effectively reduce the pathogenic factors in pure manure compost (Li H. et al, 2021). Hence, the mixed composting of rural wastes has gradually developed into a solution that cannot just increase the waste disposal rate but also improve the treatment effect.…”

Section: Introductionmentioning

confidence: 99%

Full-Scale of a Compost Process Using Swine Manure, Human Feces, and Rice Straw as Feedstock

Gao

Zhang

Tan

et al. 2022

Front. Bioeng. Biotechnol.

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Regarding the composting of rural waste, numerous studies either addressed the composting of a single waste component or were conducted at a laboratory/pilot scale. However, far less is known about the mixed composting effect of multi-component rural waste on a large scale. Here, we examined nutrient transformation, maturity degree of decomposition, and succession of microbial communities in large-scale (1,000 kg mixed waste) compost of multi-component wastes previously optimized by response models. The results showed that multi-component compost can achieve the requirement of maturity and exhibit a higher nutritional value in actual compost. It is worth noting that the mixed compost effectively removed pathogenic fungi, in which almost no pathogenic fungi were detected, and only two pathogenic bacteria regrown in the cooling and maturation stages. Structural equation models revealed that the maturity (germination index and the ratio of ammonium to nitrate) of the product was directly influenced by compost properties (electrical conductivity, pH, total organic carbon, moisture, temperature, and total nitrogen) compared with enzymes (cellulase, urease, and polyphenol oxidase) and microbial communities. Moreover, higher contents of total phosphorus, nitrate-nitrogen, and total potassium were conducive to improving compost maturity, whereas relatively lower values of moisture and pH were more advantageous. In addition, compost properties manifested a remarkable indirect effect on maturity by affecting the fungal community (Penicillium and Mycothermus). Collectively, this evidence implies that mixed compost of multi-component rural waste is feasible, and its efficacy can be applied in practical applications. This study provides a solution for the comprehensive treatment and utilization of rural waste.

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Characteristics of tetracycline antibiotic resistance gene enrichment and migration in soil–plant system

Wang,

Yu,

Cai

2024

Environ Geochem Health

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Reduction of antibiotic resistance genes under different conditions during composting process of aerobic combined with anaerobic

Cited by 26 publications

References 47 publications

Nitrogen removal and metabolic pathways of nitrifying coal ash propelled by temperature change under high nitrogen loading

Nitrogen removal and metabolic pathways of nitrifying coal ash propelled by temperature change under high nitrogen loading

Full-Scale of a Compost Process Using Swine Manure, Human Feces, and Rice Straw as Feedstock

Characteristics of tetracycline antibiotic resistance gene enrichment and migration in soil–plant system

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