Nor Affah, Khalil and Ahmad Fiqhri, Lajulliadi and Fatin Najwa, Joynal Abedin and Ahmad Noor Syimir, Fizal and Sairul Izwan, Safie and Muzafar, Zulkifli and Taweepreda, Wirach and Hossain, Md Sohrab and Ahmad Naim, Ahmad Yahaya (2024) Multifaceted impact of lipid extraction on the characteristics of polymer-based sewage sludge towards sustainable sludge management. Polymers, 16 (18). pp. 1-29. ISSN 2073-4360. (Published)
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Abstract
Dewatered sludge (DS) is a sewage sludge with a unique property due to extracellular polymeric substances (EPSs) and polymer flocculants. These components form a stable 3D polymer network to increase dewatering efficiency, leaving behind valuable materials such as lipids. This article explored the influences of DS particle size on lipid yield and the effects of extraction on the chemical, morphological, and thermal properties of the residual dewatered sludge (RDS). Lipid yields with unimodal distribution were observed across the particle size ranges (<0.5, 0.5–1.0, 1.0–2.0, 2.0–4.0, and 4.0 mm). The highest lipid yield of 1.95% was extracted from 1.0–2.0 mm after 4 h at 70 °C and 0.1 g/mL sludge-to-solvent ratio. Efficiency was influenced by the DS’s morphology, facilitating solvent infiltration and pore diffusion. The extraction process reduced water and organic fractions, resulting in higher thermal stability. Bibliometric analysis of “extraction*” and “sewage sludge” shows increasing research interest from 1973 to 2024. Five research clusters were observed: heavy metal speciation and stabilization, sludge and its bioavailability, extraction techniques and resource recovery, contaminants remediation, as well as phosphorus recovery and agricultural applications. These clusters highlight the diverse approaches to researching DS and RDS while promoting sustainable waste management.
| Item Type: | Article |
|---|---|
| Additional Information: | Indexed by Scopus |
| Uncontrolled Keywords: | Bibliometric analysis; Dewatered sludge; Extraction; Lipid extraction; Polymer-based sludge; Sewage sludge; Sludge characterization; Sustainable sludge management |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) T Technology > TD Environmental technology. Sanitary engineering T Technology > TP Chemical technology |
| Faculty/Division: | Centre for Sustainability of Mineral & Resource Recovery Technology (SMARRT) |
| Depositing User: | Mrs. Nurul Hamira Abd Razak |
| Date Deposited: | 23 Apr 2025 06:14 |
| Last Modified: | 23 Apr 2025 06:14 |
| URI: | http://umpir.ump.edu.my/id/eprint/44118 |
| Download Statistic: | View Download Statistics |
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