Effects of persulfate-assisted hydrothermal treatment of municipal sludge on aqueous phase characteristics and phytotoxicity  

作　　者：Guangchun Shan Weiguang Li Yujie Zhou Shanshan Bao Lin Zhu Wenbing Tan 

机构地区：[1]State Key Laboratory of Environmental Criteria and Risk Assessment,and State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution,Chinese Research Academy of Environmental Sciences,Beijing 100012,China [2]State Key Laboratory of Urban Water Resource and Environment,School of Environment,Harbin Institute of Technology,Harbin 150090,China [3]Key Laboratory of Water Management and Water Security for Yellow River Basin of Ministry of Water Resources(Under Construction),Yellow River Engineering Consulting Co.Ltd,Zhengzhou 450003,China

出　　处：《Journal of Environmental Sciences》2023年第4期163-173,共11页环境科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No. 42030704)。

摘　　要：Hydrothermal technology (HT) has received much attention in recent years as a process to convert wet organic waste into hydrochar.The aqueous phase (HTAP) produced by this process is still a burden and has become a bottleneck issue for HT process development.In this study,we provide the?rst investigation of the HTAP characteristics,phytotoxicity,and their correlation with persulfate (PS)(PS,2.0 mmol/g TS)-assisted municipal sludge HT.The results showed that PS accelerated the hydrolysis of protein substances and increased the concentration of NH_(4)^(+)by 13.4%to 190.5%and that of PO_(4)^(3-)by 24.2%to 1103.7%in HTAP at hydrothermal temperatures of 120 to 240℃.PS can reduce the phytotoxicity of HTAP by reducing aldehydes,ketones,N heterocyclic compounds,and particle size and by increasing its humi?cation index.The maximum values of the root length and biomass of pakchoi(Brassica chinensis L.) seedlings occurred when electrical conductivity was 0.2 mS/cm of HTAP.This work provided a new strategy for the selection and design of HTAP management strategies.

关 键 词：Hydrothermal technology Aqueous phase characteristics PAKCHOI SEEDLINGS PHYTOTOXICITY 

分 类 号：X703[环境科学与工程—环境工程] X173