• Enhancing activated sludge pro...

Treffer: Enhancing activated sludge process efficiency using static magnetic fields: Implications for microbial growth and sludge management.

Title:
Enhancing activated sludge process efficiency using static magnetic fields: Implications for microbial growth and sludge management.
Authors:
Hong C; Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing, 210046, China., Yang Y; Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing, 210046, China. Electronic address: yangying@nies.org., Yao L; College of Civil and Architecture Engineering, Chuzhou University, Chuzhou, 23900, China.
Source:
Journal of environmental management [J Environ Manage] 2025 Nov; Vol. 394, pp. 127286. Date of Electronic Publication: 2025 Sep 18.
Publication Type:
Journal Article; Review
Language:
English
Journal Info:
Publisher: Academic Press Country of Publication: England NLM ID: 0401664 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1095-8630 (Electronic) Linking ISSN: 03014797 NLM ISO Abbreviation: J Environ Manage Subsets: MEDLINE
Imprint Name(s):
Original Publication: London ; New York, Academic Press.
MeSH Terms:
Sewage*/microbiology , Magnetic Fields* , Waste Disposal, Fluid*/methods, Wastewater
Contributed Indexing:
Keywords: Activated sludge; Microbial growth; Sludge management; Static magnetic fields; Wastewater treatment optimization
Substance Nomenclature:
0 (Sewage)
0 (Wastewater)
Entry Date(s):
Date Created: 20250919 Date Completed: 20251108 Latest Revision: 20251108
Update Code:
20251108
DOI:
10.1016/j.jenvman.2025.127286
PMID:
40972297
Database:
MEDLINE

Weitere Informationen

The application of static magnetic fields (SMFs) has emerged as a promising, non-chemical strategy to enhance the performance of activated sludge processes (ASPs) in wastewater treatment. This review synthesizes current research on the effects of SMFs on microbial growth, sludge settling, and overall treatment efficiency, providing critical insights into the underlying mechanisms and practical implications. Evidence indicates that SMF intensities below 1 T stimulate microbial proliferation, while higher intensities are generally inhibitory. Optimal enhancement of biological activity and sludge compaction occurs within the 15-50 milli-Tesla (mT) range, particularly in aeration zones and secondary clarifiers. Furthermore, SMFs contribute to improved sludge dewaterability, reduction of bulking episodes, and removal of toxic compounds, all without the need for chemical additives. The review also explores the integration of SMFs with adsorption and advanced oxidation processes (AOPs), highlighting their synergistic roles in pollutant removal. By evaluating Monod kinetic coefficients and biokinetic responses, this work provides a framework for optimizing SMF-assisted ASPs in real-world wastewater treatment facilities. The findings support the use of SMFs as a sustainable and energy-efficient approach for enhancing environmental performance and resource management in wastewater systems.
(Copyright © 2025 Elsevier Ltd. All rights reserved.)

Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.