OVERVIEW AND PROSPECT ON APPLICATION OF HYDROTHERMAL TREATMENT ON SEWAGE SLUDGE HARMLESSNESS

CHEN Renjie; DONG Bin; DAI Xiaohu

doi:10.13205/j.hjgc.202309025

Volume 41 Issue 9

Sep. 2023

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2023 > 41(9): 201-209

CHEN Renjie, DONG Bin, DAI Xiaohu. OVERVIEW AND PROSPECT ON APPLICATION OF HYDROTHERMAL TREATMENT ON SEWAGE SLUDGE HARMLESSNESS[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(9): 201-209. doi: 10.13205/j.hjgc.202309025

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CHEN Renjie, DONG Bin, DAI Xiaohu. OVERVIEW AND PROSPECT ON APPLICATION OF HYDROTHERMAL TREATMENT ON SEWAGE SLUDGE HARMLESSNESS[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(9): 201-209. doi: 10.13205/j.hjgc.202309025

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OVERVIEW AND PROSPECT ON APPLICATION OF HYDROTHERMAL TREATMENT ON SEWAGE SLUDGE HARMLESSNESS

doi: 10.13205/j.hjgc.202309025

CHEN Renjie¹,
DONG Bin^{1,2
,
,},
DAI Xiaohu¹

1. College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China;
2. China Three Gorges Corporation, Beijing 100038, China

Received Date: 2023-05-11
Available Online: 2023-11-15

Abstract

Abstract

Hydrothermal treatment (HT) has been recognized as an environmental-friendly technology, which has been systematically summarized in terms of improving dewaterability, and recovering bio-energy and nutrients from sewage sludge. There is still a lack of systematic overview on the application of HT on sewage sludge harmlessness. Firstly, this paper summarized the effect of HT on the solid-liquid phase migration and chemical speciation transformation of heavy metals. That was, the HT significantly reduced the bioavailability and leachability of heavy metals in the solid phase, while the content and ecological risk of heavy metals in the liquid phase and bio-oil get increased. Secondly, the research progress of HT on the removal efficiency and degradation mechanism of pathogenic bacteria and toxic organic pollutants were summarized. That was, the HT could effectively remove antibiotics and resistance genes, persistent organic pollutants, pathogenic bacteria, and microplastics. However, among them, the biotoxicity of the degradation products of polychlorinated biphenyls (PCBs), polyfluoroalkyl substances (PFAS), and hydrothermal degradation products of microplastics (PE and PVC) were increased. Finally, in view of the current status of research, future research directions were proposed, including identifying the influence mechanism of organic/inorganic components in sludge on the transformation of toxic and harmful pollutants during HT, and evaluating the ecological risk of intermediate/final products of different toxic organic pollutants after HT.
- hydrothermal treatment (HT),
- sewage sludge,
- toxic and hazardous pollutants,
- migration and transformation

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References(64)

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