This study investigated the performance of microalgal-bacterial granular sludge (MBGS) in the restoration of Qingling Lake and Huangjia Lake, focusing on nitrogen removal under varying water quality conditions. Significant color changes in MBGS and differences in granule characteristics were observed, with Qingling Lake demonstrating superior removal efficiencies for ammonia nitrogen, nitrate nitrogen, and total nitrogen compared to Huangjia Lake. Stoichiometric analysis revealed that when the chemical oxygen demand (COD) and carbon-to-nitrogen (C/N) ratios were less than 20 mg/L and 20, respectively, assimilatory nitrate reduction was positively correlated with both, whereas denitrification was negatively correlated. Gene function analysis showed that Qingling Lake had a more active microbial community supporting efficient nitrogen metabolism. The findings highlighted the enormous potential of MBGS in lake restoration, demonstrating its ability to adapt to different COD concentrations and C/N ratios by altering its nitrogen removal pathways.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.biortech.2024.131215 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Enhanced Nitrogen Removal from a Recirculating Aquaculture System Using a Calcined FeS -Packed Denitrification Bioreactor.
ACS Omega
December 2024
College of Environmental Engineering, Henan University of Technology, Zhengzhou 450001, China.
In this study, a recirculating aquaculture system (RAS) was constructed, and a denitrification bioreactor was installed to enhance nitrogen removal. In addition, the nitrogen removal performance of the system was investigated. FeS was prepared by calcining iron (Fe) and S powder, which was used as an electron donor for denitrification.
View Article and Find Full Text PDFOptimizing Biochar-Based Column Filtration Systems for Enhanced Pollutant Removal in Wastewater Treatment: A Preliminary Study.
Chemosphere
January 2025
Laboratory of Water, Biodiversity and Climate Change (EauBiodiCc), Faculty of Sciences Semlalia, University Cadi Ayyad, Marrakech Morocco; National Centre for Studies and Research on Water and Energy (CNEREE), University Cadi Ayyad, Marrakech Morocco. Electronic address:
This study aims to test the efficiency of biochar-based substrates in removing chemical and bacteriological pollutants from wastewater and to determine the optimal percentage of biochar (BC) to implement for large-scale filters (e.g., constructed wetlands).
View Article and Find Full Text PDFPolyphenolic compounds mitigate the oxidative damage of anammox sludge under long-term light irradiation.
Bioresour Technol
January 2025
School of Engineering, Hangzhou Normal University, Hangzhou 310018 China.
Continuous high-intensity light exposure can inhibit anaerobic ammonium oxidation (anammox) bacteria activity, though the specific impacts on anammox reactor performance remain unclear. This study investigates the effects of long-term light stress on anammox sludge reactors and explores the use of tea polyphenols as an engineering interventions to mitigate photo oxidation damage. The results showed that the nitrogen removal efficiency (NRE) of the reactor rapidly deteriorated to 41.
View Article and Find Full Text PDFUnraveling nitrogen removal performance during increasing loading rates in simultaneous nitrification and autotrophic denitrification: A functional and ecological analysis approach.
Sci Total Environ
January 2025
Facultad de Ingeniería y Ciencias, Universidad Adolfo Ibáñez, Avda. Padre Hurtado 750, Viña del Mar, Chile.
Nitrogen contamination of water sources poses significant environmental and health risks. The sulfur-driven simultaneous nitrification and autotrophic denitrification (SNAD) process offers a cost-effective solution, as it operates in a single reactor, requires no organic carbon addition, and produces minimal sludge. However, this process remains underexplored, with microbial population dynamics, their interactions, and their implications for process efficiency not yet fully understood.
View Article and Find Full Text PDFBiotic factors shape the structure and dynamics of denitrifying communities within cyanobacterial aggregates.
Environ Res
January 2025
Shanghai Key Lab for Urban Ecological Processes and Eco-Restorations, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, China; Center for Global Change and Ecological Forecasting, Institute of Eco-Chongming, Shanghai, China. Electronic address:
Eutrophication caused by human activities has severely impacted freshwater ecosystems, leading to harmful cyanobacterial blooms that threaten water quality and ecosystem stability. During blooms, denitrification is a key process for nitrogen removal, which can occur both in the sediment and in the waterbody mediated by cyanobacterial aggregate (CA)-associated microorganisms. In this study, the structure, dynamics and assembly mechanisms of CA-associated nirK-, nirS-, and nosZ-encoding denitrifying communities were investigated in the eutrophic Lake Taihu across the bloom season.
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!