Journal ArticleDOI
Effect of metal nanoparticles on microbial community shift and syntrophic metabolism during anaerobic digestion of Azolla microphylla
TLDR
Results showed that addition of both Fe3O4 and Ni NPs at optimal concentration significantly accelerated the substrate degradation rate and enhancing the biomethane yield in anaerobic reactor (M3) supplemented with NPs as compared to control (M0).Abstract:
Supplementation of anaerobic digesters with conductive nanoparticles (NPs) is considered as a potential approach for augmenting methanogenesis, however, their impact on microbial diversity, methanogenesis routes and metabolic pathways appear to differ depending on the substrate and operational conditions. Hence, in the present study, using metagenomics and KEGG pathway analysis, an attempt was made to gain an insight into the influence of two NPs viz., Fe3O4 and Ni, on the microbial composition and metabolic pathways during anaerobic digestion (AD) of Azolla microphylla. Results showed that addition of both Fe3O4 and Ni NPs at optimal concentration significantly accelerated the substrate degradation rate (89.8%) thereby enhancing the biomethane yield by 49.1% in anaerobic reactor (M3) supplemented with NPs as compared to control (M0). The dominance of microbial species (Enterococcus sp.) belonging to Firmicutes phylum in M3 reactor, indicated an efficient hydrolysis of Azolla biomass, owing to abundance of glycoside hydrolase (GH)-coding genes in their genome. Metagenomic analysis showed the enrichment of Geobacter sp. and Methanosaeta harundinacea in NPs-amended reactor confirming syntrophic metabolism of AD intermediate products that could have resulted in enhanced hydrogenotrophic methanogenesis via DIET. Predominance of Fe (III) reducing acetoclastic methanogen Methanosarcina acetivorans in NPs-fed reactor might also have been attributed to enhanced methane production. KEGG pathway analysis also showed an enhancement of major metabolic pathways viz., Carbohydrate metabolism, Methane metabolism and Lipid metabolism, in M3 reactor which further signifies the stimulatory effect of NPs.read more
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Insights into the Synthesis, types and application of iron Nanoparticles: The overlooked significance of environmental effects
TL;DR: The application of iron-based nanoparticles in environmental remediation has been discussed in this paper , which summarizes different synthesis methods of iron nanoparticles and the removal mechanism of various pollutants.
Journal ArticleDOI
Insights into the Synthesis, types and application of iron Nanoparticles: The overlooked significance of environmental effects
Weihua Xu,Ting Yang,Shaobo Liu,Li Du,Qiang Chen,Xin Li,Jie Dong,Zhuang Zhang,Sihui Lu,Youzi Gong,Liang Zhou,Yunguo Liu,Xiaofei Tan +12 more
TL;DR: In this paper, a review summarizes different synthesis methods of iron nanoparticles and the removal mechanism of various pollutants and also systematically classified the unstable and stable IR nanoparticles, and some suggestions and conclusions are put forward for the application of IR in environmental remediation.
Journal ArticleDOI
Impact of electro-conductive nanoparticles additives on anaerobic digestion performance - A review.
TL;DR: In this article, the effect of the type and size of electro-conductive nanoparticles on improving microbial degradation within anaerobic digestion (AD) systems, as well as their effect on microbial community shifts and syntrophic metabolism is discussed.
Journal ArticleDOI
Impacts of nano-zero-valent iron on antibiotic removal by anaerobic membrane bioreactor for swine wastewater treatment
TL;DR: In this article , the authors investigated the impact of nano-zero-valent iron (nZVI) on the removal of veterinary antibiotics by an anaerobic membrane bioreactor (AnMBR) for swine wastewater treatment.
Journal ArticleDOI
Quorum sensing signals enhanced caproate production by changing microbial community in chain elongation enrichments
Jing Li,He Liu,He Liu,Ping Wu,Peng Ding,Jie Zhang,Chao Zhang,Bo Fu,Bo Fu,Min-Hua Cui,Min-Hua Cui +10 more
TL;DR: In this article, Nacyl-homoserine lactones (AHLs) were investigated to enhance the production of caproate from ethanol and acetate in chain elongation enrichments.
References
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Journal ArticleDOI
Use of Dinitrosalicylic Acid Reagent for Determination of Reducing Sugar
Journal ArticleDOI
Natural Antibiotic Resistance and Contamination by Antibiotic Resistance Determinants: The Two Ages in the Evolution of Resistance to Antimicrobials
TL;DR: The study of antibiotic resistance has been historically concentrated on the analysis of bacterial pathogens and on the consequences of acquiring resistance for human health, but the studies on antibiotic resistance should not be confined to clinical-associated ecosystems.
Journal ArticleDOI
Exoelectrogenic bacteria that power microbial fuel cells
TL;DR: This Progress article explores the underlying reasons for exocellular electron transfer, including cellular respiration and possible cell–cell communication, to understand bacterial versatility in mechanisms used for current generation.
Journal ArticleDOI
The footprint of urban heat island effect in China
TL;DR: Using MODIS data from 2003 to 2012, it is shown that the UHI effect decayed exponentially toward rural areas for majority of the 32 Chinese cities, and an obvious urban/rural temperature “cliff” is found.
Journal ArticleDOI
Characterization and genomic analysis of kraft lignin biodegradation by the beta-proteobacterium Cupriavidus basilensis B-8
TL;DR: These results confirmed the capability of C. basilensis B-8 to promote KL degradation and provide a theoretical basis for research into the mechanisms of lignin degradation as well as a practical basis for biofuel production using lignIn materials.