Category Ranking
98%
Total Visits
921
Avg Visit Duration
2 minutes
Citations
20
Article Abstract
Mechanical sludge dewatering is one of the stages of the municipal wastewater treatment process, which allows the amount of generated sludge and the cost of its transport and management to be reduced. Achieving a high degree of dewatering is possible thanks to the use of flocculation technology. The article presents issues related to the theory of flocculation, sewage sludge, and its dewatering. The main mechanisms of flocculation, the kinetics of the process, the division of flocculants, and flocculation in dual systems are discussed. The influence of particular parameters on the efficiency of flocculation and the dewatering of sewage sludge was analyed. The assessed parameters are: pH, the presence of salt, the mixing process, the structure and ionicity of chains, and the dose. The results of experimental studies on the dewatering of various types of sludge were compared. The literature review included in the paper helps to better understand the process of flocculation and sludge dewatering, and presents the progress to date and the possible directions for further development in this field.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.scitotenv.2022.153328 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Molecular-scale mechanism of extracellular protein over-flocculation for sewage sludge dewatering by polyacrylamide.
Water Res
September 2025
Key Laboratory of Drinking Water Science and Technology, Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. Electronic address:
Flocculation is one of the most common treatment processes for sludge dewatering, representing the last line of solid-liquid separation for sludge dewatering. However, the macroscopic and descriptive theories of polyacrylamide (PAM) -based over-flocculation have limited the optimization of its performance in the dewatering of sewage sludge, whose water is typically trapped within a three-dimensional gel matrix governed by extracellular polymeric substances (EPS). This study focuses on loosely bound EPS (LB-EPS) to uncover molecular-level mechanism of excessive PAM dosing.
View Article and Find Full Text PDFImproving sludge dewaterability through freeze-thaw pretreatment: Ice crystal morphology controls consolidation and rheological enhancement.
Environ Res
September 2025
Vietnam National University Ho Chi Minh City, Ho Chi Minh City, 700000, Viet Nam. Electronic address:
Municipal sludge, characterized by its high-water-content and viscous texture, poses significant environmental challenges due to inefficient dewatering and poor flowability. The freeze-thaw (F/T) method is an effective and environmentally friendly pretreatment approach. It is crucial to apply rheological analysis to examine the influence of refrigeration temperature on dewatering effects and to investigate the underlying mechanisms.
View Article and Find Full Text PDFEmerging contaminants in sludge treatment reed beds: Removal, persistence, or accumulation?
Water Res
August 2025
Department of Environmental Science, Aarhus University, Frederiksborgvej 399, DK-4000 Roskilde, Denmark; WATEC - Centre for Water Technology, Aarhus University, Ny Munkegade 120, 8000 Aarhus, Denmark.
Sludge treatment reed beds (STRBs) are a sustainable and cost-effective approach to dewatering and mineralizing sewage sludge. While these nature-based solutions are robust and efficient in dewatering and stabilizing excess sludge, it is still unclear the fate of micropollutants in such technology and consequently, the quality of the final product biosolids that can be used as fertilizer, when legislation allows for it. The STRBs consisted of an area of 2.
View Article and Find Full Text PDFDraft genome sequence of sp. ARAG 43.8.
Microbiol Resour Announc
August 2025
Food Industries Research Institute, Hanoi, Vietnam.
The draft genome sequence of sp. ARAG 43.8, an agarolytic bacterium isolated from dewatered sewage sludge of an agar factory in Hai Phong, Vietnam, is presented here.
View Article and Find Full Text PDFOzone enhances biological treatment of hydrothermal liquefaction aqueous stream from municipal sludge.
Bioresour Technol
December 2025
UBC Bioreactor Technology Group, School of Engineering, University of British Columbia Okanagan Campus, Kelowna, BC V1V 1V7, Canada; ICREA - Catalan Institution for Research and Advanced Studies, Pg. Lluís Companys 23, Barcelona, Spain; GEMMA - Group of Environmental Engineering and Microbiology, D
Hydrothermal liquefaction (HTL) is a promising alternative to anaerobic digestion for municipal sludge valorization due to biocrude oil and nutrient-dense hydrochar production, smaller footprint, enhanced micropollutant degradation, and minimized residual biosolids. However, integrating HTL into wastewater treatment plants necessitates on-site treatment of HTL aqueous, which is 80 % of byproducts by volume. HTL aqueous exhibits inhibition on downstream biological treatment due to high chemical oxygen demand (COD), total phenolics, ketones and nitrogen heterocyclics.
View Article and Find Full Text PDF