Enhancing Anaerobic Digestion of Food Waste by Combining Carriers and Microaeration: Performance and Potential Mechanisms DOI

Baocun Wu,

Yi Wang, Linyan He

et al.

ACS ES&T Engineering, Journal Year: 2024, Volume and Issue: 4(10), P. 2506 - 2519

Published: Aug. 13, 2024

Enhancing the anaerobic digestion (AD) of organic wastes has been a widely discussed topic. This study aims to enhance AD performance by combining microaeration with conductive or nonconductive carriers, using food waste as substrate. The use carriers alone enhanced methane production, and further improved performance. carrier showed significant enhancement microaeration, achieving daily yield 478 ± 11.3 mL CH4/g VS, which was 1.1 1.3 times higher than that control digester, respectively. Furthermore, explored various aspects, including oxidative stress, antioxidant capacity, microbial community structure during digestion. results demonstrated hydrolytic-acidification efficiency promoted direct interspecies electron transfer among syntrophic microorganisms. Methanogenic archaea aggregated on surface formed consortia facultative anaerobes, thereby mitigating stress effects cells enhancing total production. Moreover, metabolomics analysis ATP transport across bacterial membrane, accelerated nutrient conversion, caused changes in metabolites intermediates related glycerophospholipids, amino acids, signal transduction pathways.

Language: Английский

Bridging relevance between microplastics, human health and bone metabolism: Emerging threats and research directions DOI Creative Commons
Yuan‐Wei Zhang, Dongyang Zhou, Sicheng Wang

et al.

Environmental Chemistry and Ecotoxicology, Journal Year: 2024, Volume and Issue: 6, P. 422 - 435

Published: Jan. 1, 2024

Language: Английский

Citations

3
New Horizons in Micro/Nanoplastic-Induced Oxidative Stress: Overlooked Free Radical Contributions and Microbial Metabolic Dysregulations in Anaerobic Digestion DOI
Xingxing Zhang, Xuxiang Zhang, Liping Ma

et al.

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 5, 2024

Excessive production of reactive oxygen species (ROS) induced by micro/nanoplastics (MPs/NPs) is highly toxic to microbes. However, the mechanisms underlying ROS generation and metabolic regulation within anaerobic guilds remain poorly understood. In this study, we investigated effects environmentally relevant levels polypropylene (PP)-MPs/NPs on oxidative stress microbial ecology during digestion (AD). Electron paramagnetic resonance spectroscopy revealed that PP-MPs/NPs elevated concentrations persistent free radicals (EPFRs) derived hydroxyl (•OH). EPFRs were identified as primary contributors •OH generation, evidenced a high Spearman correlation coefficient (r = 0.884, p < 0.001) radical-quenching studies. The formation enhanced 86.2–100.9%, resulting in decreased cellular viability methane (by 37.5–50.5%) at 100 mg/g TS PP-MPs/NPs. Genome-centric metagenomic metatranscriptomic analyses suggested reassembly community structures, re-evolution functional traits, remodeling interspecies interactions. Specifically, shift methanogen consortia from hydrogenotrophic Methanofollis sp. acetoclastic Methanothrix soehngenii, primarily because latter's diverse ingestion patterns, electron bifurcation complexes, ROS-scavenging abilities. Downregulation genes associated with antioxidative defense systems (i.e., sodN, katA, osmC) ROS-driven redox signal transduction pathways (c-di-AMP phosphorylation signaling pathways) provided insights into ROS-induced dysregulation. Our findings enhance understanding ecological traits under MPs/NPs stressors, facilitating control toxicity stabilization AD processes.

Language: Английский

Citations

3
Propionate production and degradation in the biological wastewater treatment: A mini review on the role of additives in anaerobic digestion DOI Creative Commons
Armin Rahimieh,

Ghazaleh Akhavan,

Milad Mousazadehgavan

et al.

Desalination and Water Treatment, Journal Year: 2024, Volume and Issue: 319, P. 100555 - 100555

Published: June 20, 2024

Propionate production and consumption are influenced by thermodynamic constraints, microbial competitions, metabolic inhibition. Accumulation of propionate in wastewater can destabilize anaerobic digestion lead to process failure. Anaerobic is one the viable biological methods for its recovery utilization. Additives have been shown modulate consumption, effectively influencing overall performance digestion. This mini review systematically examines application various additives their effects on: (I) (less CH4 more propionate) (II) degradation CH4) goals studied listed recent studies on most used classified them according impact concentration. To our knowledge, limited research has conducted role recovery. No reviewed from or potential mitigate inhibitory effects. enables researchers select suitable additive recover boost mitigating inhibition, as well discussing modern bioreactors.

Language: Английский

Citations

2
Selection for antimicrobial resistance in the plastisphere DOI Creative Commons
Emily M. Stevenson, Angus Buckling, Matthew Cole

et al.

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 908, P. 168234 - 168234

Published: Nov. 2, 2023

Microplastics and antimicrobials are widespread contaminants that threaten global systems frequently co-exist in the presence of human or animal pathogens. Whilst impact each these has been studied isolation, influence this co-occurrence driving antimicrobial resistance (AMR)1 microplastic-adhered microbial communities, known as 'the Plastisphere', is not well understood. This review proposes mechanisms by which interactions between microplastics may drive selection for AMR Plastisphere. These include: 1) increased rates horizontal gene transfer Plastisphere compared with free-living counterparts natural substrate controls due to proximity cells, environmental selective compounds sequestering extracellular antibiotic genes biofilm matrix. 2) An elevated pressure adsorbing co-selective at concentrations greater than those found surrounding mediums potentially adsorbed comparator particles. 3) be further incorporation chemicals plastic matrix during manufacture. Implications both ecological functioning risk assessments discussed, alongside recommendations research.

Language: Английский

Citations

6
Enhancing Anaerobic Digestion of Food Waste by Combining Carriers and Microaeration: Performance and Potential Mechanisms DOI

Baocun Wu,

Yi Wang, Linyan He

et al.

ACS ES&T Engineering, Journal Year: 2024, Volume and Issue: 4(10), P. 2506 - 2519

Published: Aug. 13, 2024

Enhancing the anaerobic digestion (AD) of organic wastes has been a widely discussed topic. This study aims to enhance AD performance by combining microaeration with conductive or nonconductive carriers, using food waste as substrate. The use carriers alone enhanced methane production, and further improved performance. carrier showed significant enhancement microaeration, achieving daily yield 478 ± 11.3 mL CH4/g VS, which was 1.1 1.3 times higher than that control digester, respectively. Furthermore, explored various aspects, including oxidative stress, antioxidant capacity, microbial community structure during digestion. results demonstrated hydrolytic-acidification efficiency promoted direct interspecies electron transfer among syntrophic microorganisms. Methanogenic archaea aggregated on surface formed consortia facultative anaerobes, thereby mitigating stress effects cells enhancing total production. Moreover, metabolomics analysis ATP transport across bacterial membrane, accelerated nutrient conversion, caused changes in metabolites intermediates related glycerophospholipids, amino acids, signal transduction pathways.

Language: Английский

Citations

2