LAPSE:2024.0203
Published Article
LAPSE:2024.0203
Wet Oxidation of Pharmaceutical Sludge for the Treatment and Production of Value-Added Materials
February 10, 2024
The wet oxidation of pharmaceutical sludge for the treatment and production of value-added materials was investigated. The experiments were carried out in a stainless-steel autoclave reactor with chemical synthetic pharmaceutical sludge. The highest removal rate of total suspended solids (90.1%) and volatile suspended solids (98.4%) was achieved at 260 °C for 60 min with an initial oxygen pressure of 0.8 MPa. Simultaneously, the total chemical oxygen demand removal rate (78.7%) and the soluble chemical oxygen demand removal rate (81.6%) were obtained. The volatile fatty acid concentration—including acetic acid, propanoic acid, isobutyric acid and isovaleric acid—increased to 4819 mg/L with pH 12.56, which indicated the possibility of improving the quality of wet oxidized sludge solution as a potential carbon source by adding reagents. Scanning electron microscopy images showed that the sludge became a loose porous structure after wet oxidation, which is beneficial for dewatering performance. Energy dispersive spectroscopy images illustrate that carbon elements in sludge migrate from solid to liquid phases during the wet oxidation process. These results provide meaningful data for the design of further works and demonstrate that wet oxidation is a promising method for the treatment of pharmaceutical sludge, and the produced volatile fatty acids, including acetic acid and propanoic acid, are potential carbon sources for the biological treatment of wastewater.
Record ID
Keywords
chemical oxygen demand removal, pharmaceutical sludge, total suspended solids removal, volatile fatty acids, volatile suspended solids removal, wet oxidation
Subject
Suggested Citation
Fang K, Zeng X, Yao G, Xia S, Zhao J, Zhou Y, Zhu Y, Li X, Qu C. Wet Oxidation of Pharmaceutical Sludge for the Treatment and Production of Value-Added Materials. (2024). LAPSE:2024.0203
Author Affiliations
Fang K: State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
Zeng X: State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
Yao G: State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
Xia S: State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
Zhao J: State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
Zhou Y: State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; Jiaxing Key Laboratory of Environmental Risk Source Identification and Control, Jiaxing-Tongji Eviro
Zhu Y: State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
Li X: State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
Qu C: State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
Zeng X: State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
Yao G: State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
Xia S: State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
Zhao J: State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
Zhou Y: State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; Jiaxing Key Laboratory of Environmental Risk Source Identification and Control, Jiaxing-Tongji Eviro
Zhu Y: State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
Li X: State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
Qu C: State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
Journal Name
Processes
Volume
11
Issue
9
First Page
2747
Year
2023
Publication Date
2023-09-14
Published Version
ISSN
2227-9717
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Original Submission
Other Meta
PII: pr11092747, Publication Type: Journal Article
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Published Article
LAPSE:2024.0203
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External Link
doi:10.3390/pr11092747
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[v1] (Original Submission)
Feb 10, 2024
Verified by curator on
Feb 10, 2024
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v1
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https://psecommunity.org/LAPSE:2024.0203
Original Submitter
Calvin Tsay
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