The contribution of extracellular polymeric substances (EPS), including loosely bound EPS (LB-EPS) and tightly bound EPS (TB-EPS), to the aggregation of both aerobic and anaerobic sludge is explored using the extended DLVO theory. It is observed that the aggregation abilities of both sludge samples decrease with the extraction of LB-EPS and TB-EPS, implying the crucial roles of EPS in sludge aggregation. Furthermore, through analyzing the interaction energy curves of sludge before and after the EPS extraction using the extended DLVO theory, it is found that both LB-EPS and TB-EPS have a substantial contribution to the sludge aggregation. The interaction energy of LB-EPS is always negative, suggesting that the LB-EPS always display a positive effect on the sludge aggregation. On the other hand, the interaction energy of TB-EPS is not always negative, depending on the separation distance between sludge cells. These results imply that the LB-EPS and TB-EPS have different contributions to the sludge aggregation.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/es9016766 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Development and Application of a Polycationic Soybean Protein-Based Flocculant for Enhanced Flocculation and Dewatering of Dairy Manure.
Chemosphere
January 2025
Department of Population Health and Reproduction, School of Veterinary Medicine, University of California-Davis, USA.
In agricultural and waste management systems, dairy manure wastewater is often recycled for irrigation. However, a key challenge lies in handling suspended solids (SS) and effectively dewatering sludge. To address this, an innovative polycationic soybean protein-based flocculant (SPI+) was developed and applied to enhance flocculation and sludge dewatering efficiency.
View Article and Find Full Text PDFPyrrhotite promote aerobic granular sludge formation in dye wastewater: pH, interfacial free energy, and microbial community evolution.
Bioresour Technol
December 2024
School of Civil Engineering and Architecture, Zhejiang University of Science and Technology, Hangzhou 310000, PR China; Key Laboratory of Recycling and Eco-treatment of Waste Biomass of Zhejiang Province, Hangzhou 310023, PR China.
This study introduces a technique utilizing natural pyrrhotite powder as a nucleating agent in four sequencing batch reactors (SBRs) for the treatment of dye wastewater. Through analysis of various factors including pH, pyrrhotite surface free energy, sludge zeta potential, and shifts in microbial communities, the mechanism by which pyrrhotite facilitates the formation of aerobic granular sludge (AGS) is elucidated. Over 140 days of continuous operation under neutral conditions, natural pyrrhotite rapidly cultivated AGS under neutral conditions.
View Article and Find Full Text PDFSub-minimum inhibitory concentrations in ceftazidime exacerbate the formation of Acinetobacter baumannii biofilms.
Microb Pathog
December 2024
Laboratory of Applied Microbiology and Cancer Remedies, School of Life Sciences, Jawaharlal Nehru University, New Delhi, 110067, India. Electronic address:
Associated with nosocomial infections, the environmental Gram-negative coccobacillus A. baumannii leads to various kinds of high mortality-rate infections among which pneumonias mainly in immune-compromised people from health-care facilities. A critical component of the current antibiotic resistance problem is the presence of antibiotics sub-minimum inhibitory concentrations (sub-MICs) in a variety of natural settings including drinking water, sewage water, rivers, lakes, and natural sludge.
View Article and Find Full Text PDFVisual and real-time detection of the critical micelle concentration of nonionic surfactants using a supramolecular aggregate probe responsive to stable micelles.
Talanta
December 2024
National Laboratory for Molecular Sciences, Center for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry Chinese Academy of Sciences, Beijing, 100190, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
The critical micelle concentration (CMC) is considered one of the important parameters for evaluating and comparing surfactants. We have developed a novel method for detecting the CMC of nonionic surfactants, based on the environmentally responsive characteristics of cyanine dyes probes. Notably, this method exhibits high sensitivity, visual real-time monitoring capabilities, and robust anti-interference properties.
View Article and Find Full Text PDFInfluence of monosaccharides and lipids on protein structure and solubility-Reaction simulation of sludge thermal hydrolysis system.
Bioresour Technol
December 2024
Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, China. Electronic address:
During the hydrothermal treatment process, sludge proteins can interact with other organic matter, thereby affecting protein structure and altering protein solubility. This paper investigates the effects and causes of monosaccharides and lipids on protein structure and solubility during thermal hydrolysis of sludge. The results indicated that monosaccharides increase protein solubility by preventing the conversion of proteins into free amino acids.
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!