Treatment of sewage sludge hydrothermal carbonization aqueous phase by Fe(II)/CaO2 system Oxidation behaviors and mechanism of organic compounds

Treatment of sewage sludge hydrothermal carbonization aqueous phase by Fe(II)/CaO2 system : Oxidation behaviors and mechanism of organic compounds

Copyright © 2023 Elsevier Ltd. All rights reserved.

Bibliographische Detailangaben
Veröffentlicht in:Waste management (New York, N.Y.). - 1999. - 158(2023) vom: 01. März, Seite 164-175
1. Verfasser: Liu, Liming (VerfasserIn)
Weitere Verfasser: Zhai, Yunbo, Wang, Hongxia, Liu, Xiangmin, Liu, Xiaoping, Wang, Zhexian, Zhou, Yin, Zhu, Yun, Xu, Min
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2023
Zugriff auf das übergeordnete Werk:Waste management (New York, N.Y.)
Schlagworte:Journal Article Calcium peroxide Dissolved organic matter Fenton-like system Hydrothermal carbonization aqueous phase Sewage sludge Sewage Wastewater Carbon 7440-44-0 mehr... Phenols Dissolved Organic Matter Ferrous Compounds
Beschreibung
Zusammenfassung:Copyright © 2023 Elsevier Ltd. All rights reserved.
The Fe(II)/CaO2 system with a stable oxidant and a low-cost homogeneous activating agent has been considered as a prospective process for the disposal of wastewater. The system was constructed to treat sewage sludge hydrothermal carbonization aqueous phase (HTC-AP) in this study. As the hydrothermal temperature increased, the organics in the HTC-AP were first decomposed and then cyclized, while the Maillard reaction occurs throughout the stage. The oxidation efficiency of the Fe(II)/CaO2 system was related to the composition of organics in HTC-AP, and the removal of dissolved organic carbon (DOC) by the system was 38.56 % in the HTC-AP obtained by hydrothermal treatment at 220 °C. Redundancy analysis showed that the low molecular weight organics, hydrophobic acids, and hydrophobic neutral components were beneficial to DOC removal, while Maillard products and cyclization products were hard to be oxidized to CO2 and H2O. The CN functional group of the protein facilitated DOC removal, and some organics in HTC-AP were oxidized to acids and phenols. The energy input to remove DOC in Fe(II)/CaO2 system was 27.74 MJ per kg carbon. This study provides a low-energy consumption Fe(II)/CaO2 system for the post-treatment of HTC-APs and explores the applicability of the system
Beschreibung:Date Completed 10.02.2023
Date Revised 10.02.2023
published: Print-Electronic
Citation Status MEDLINE
ISSN:1879-2456
DOI:10.1016/j.wasman.2023.01.016