The slow rate of electron transfer and the large consumption of carbon sources are technical bottlenecks in the biological treatment of wastewater. Here, we first proposed to domesticate aerobic denitrifying bacteria (ADB) from heterotrophic to autotrophic by electricity (0.6 V) under zero organic carbon source conditions, to accelerate electron transfer and shorten hydraulic retention time (HRT) while increasing the biodegradation rate. Then we investigated the extracellular electron transfer (EET) mechanism mediated by this process, and additionally examined the integrated nitrogen removal efficiency of this system with composite pollution. It was demonstrated that compared with the traditional membrane bioreactor (MBR), the BEC displayed higher nitrogen removal efficiency. Especially at C/N = 0, the BEC exhibited a NO-N removal rate of 95.42 ± 2.71 % for 4 h, which was about 6.5 times higher than that of the MBR. Under the compound pollution condition, the BEC still maintained high NO-N and tetracycline removal (94.52 ± 2.01 % and 91.50 ± 0.001 %), greatly superior to the MBR (10.64 ± 2.01 % and 12.00 ± 0.019 %). In addition, in-situ electrochemical tests showed that the nitrate in the BEC could be directly converted to N by reduction using electrons from the cathode, which was successfully demonstrated as a terminal electron acceptor.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.ecoenv.2023.115691 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Differential impacts of ribosomal protein haploinsufficiency on mitochondrial function.
J Cell Biol
March 2025
Department of Molecular Biosciences, University of Texas at Austin, Austin, TX, USA.
The interplay between ribosomal protein (RP) composition and mitochondrial function is essential for energy homeostasis. Balanced RP production optimizes protein synthesis while minimizing energy costs, but its impact on mitochondrial functionality remains unclear. Here, we investigated haploinsufficiency for RP genes (rps-10, rpl-5, rpl-33, and rps-23) in Caenorhabditis elegans and corresponding reductions in human lymphoblast cells.
View Article and Find Full Text PDFOrganic Crosslinked Tin Oxide Mitigating Buried Interface Defects for Efficient and Stable Perovskite Solar Cells.
Angew Chem Int Ed Engl
January 2025
Southern University of Science and Technology, Department of Materials Science and Engineering, NO.1088,Xueyuan Avenue,Nanshan District, 518055, Shenzhen, CHINA.
Tin dioxide (SnO2) stands as a promising material for the electron transport layer (ETL) in perovskite solar cells (PSCs) attributed to its superlative optoelectronic properties. The attainment of superior power conversion efficiency hinges critically on the preparation of high-quality SnO2 thin films. However, conventional nanoparticle SnO2 colloids often suffer from inherent issues such as numerous oxygen vacancy defects and film non-uniformity.
View Article and Find Full Text PDFElectronic Substitution Effect on ESIPT-Driven pH and Amine Sensing: Exploring Mechanism.
Chem Asian J
January 2025
BITS- Pilani, Chemistry, FD-III, 333031, Pilani, INDIA.
It is required to have a more straightforward and easier way to check the quality of food to ensure the safety of the public heaths. The decomposition of meat protein results in ammonia and biogenic amines (BAs). Here, we have designed and synthesized three luminescent-based probe molecules, which originated from 2-(2-hydroxyphenyl) benzothiazole (HBT) derivatives and showed the excited state-induced proton transfer (ESIPT) phenomenon.
View Article and Find Full Text PDFVisualizing Electron Transfer through Silver Nanoparticle Formation and Photothermal Imaging: A Case Study of Nanoscale Zerovalent Iron.
Environ Sci Technol
January 2025
Faculty of Agriculture, Life, and Environmental Sciences, Zhejiang University, Hangzhou 310058, China.
Electron release and transfer are pivotal to the efficiency of multiple biogeochemical and pollutant processes. Despite substantial efforts to develop electron-transfer characterization techniques, visualization of electron transfer remains challenging. This study introduces an innovative strategy for mapping electron-transfer distance using nanoscale zerovalent iron (nZVI) as a case study.
View Article and Find Full Text PDFMolecular engineering charge transfer and triplet exciton formation in donor-acceptor cocrystals.
J Chem Phys
January 2025
Department of Chemistry and Paula M. Trienens Institute for Sustainability and Energy Northwestern University, Evanston, Illinois 60208-3113, USA.
Organic donor-acceptor (D-A) cocrystals are gaining attention for their potential applications in optoelectronic devices. This study explores the dynamics of charge transfer (CT) and triplet exciton formation in various D-A cocrystals. By examining a series of D-A cocrystals composed of coronene (COR), peri-xanthenoxanthene (PXX), and perylene (PER) donors paired with N,N-bis(3'-pentyl)perylene-3,4:9,10-bis(dicarboximide) (PDI), naphthalene-1,4:5,8-tetracarboxy-dianhydride (NDA), or pyrene-4,5,9,10-tetraone (PTO) acceptors, using transient absorption microscopy and time-resolved electron paramagnetic resonance spectroscopy, we find that the strength of the CT interaction influences the nature and yield of triplet excitons produced by CT state recombination.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!