TY - JOUR
T1 - The influence of key reactions during hydrothermal carbonization of sewage sludge on aqueous phase properties
T2 - A review
AU - Xu, Zhi Xiang
AU - Ma, Xue Qin
AU - Zhou, Jun
AU - Duan, Pei Gao
AU - Zhou, Wei You
AU - Ahmad, Awais
AU - Luque, Rafael
N1 - Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2022/10
Y1 - 2022/10
N2 - Hydrothermal carbonization (HTC) emerges as a promising technology to reduce the volume of activated sewage sludge (SS) and generate solid products as fuels. During HTC, extracellular polymeric substance and cell wall degrade to form low molecular compounds, which can further carry out hydrolysis, dehydration, polymerization, etc. The temperature has a notable impact on the HTC, which ultimately changes the composition of the aqueous phase. A large amount of the aqueous phase remains a by-product containing high amounts of organic and inorganic compounds. Herein, the HTC of SS process and aqueous phase treatment were discussed, especially in industrial applications within China. This review depicts the influence of aqueous phase properties on the hydrochar properties of SS, especially using the aqueous phase recirculation process. The mechanism during HTC of SS has been discussed, especially Maillard reaction, which would significantly influence the aqueous phase and hydrochar. The systematic information on the current research, new applications and new perspectives in this field to promote its further development were provided.
AB - Hydrothermal carbonization (HTC) emerges as a promising technology to reduce the volume of activated sewage sludge (SS) and generate solid products as fuels. During HTC, extracellular polymeric substance and cell wall degrade to form low molecular compounds, which can further carry out hydrolysis, dehydration, polymerization, etc. The temperature has a notable impact on the HTC, which ultimately changes the composition of the aqueous phase. A large amount of the aqueous phase remains a by-product containing high amounts of organic and inorganic compounds. Herein, the HTC of SS process and aqueous phase treatment were discussed, especially in industrial applications within China. This review depicts the influence of aqueous phase properties on the hydrochar properties of SS, especially using the aqueous phase recirculation process. The mechanism during HTC of SS has been discussed, especially Maillard reaction, which would significantly influence the aqueous phase and hydrochar. The systematic information on the current research, new applications and new perspectives in this field to promote its further development were provided.
KW - Aqueous phase
KW - Hydrochar
KW - Hydrothermal carbonization
KW - Industrial application
KW - Sewage sludge
UR - http://www.scopus.com/inward/record.url?scp=85137277772&partnerID=8YFLogxK
U2 - 10.1016/j.jaap.2022.105678
DO - 10.1016/j.jaap.2022.105678
M3 - 文章
AN - SCOPUS:85137277772
SN - 0165-2370
VL - 167
JO - Journal of Analytical and Applied Pyrolysis
JF - Journal of Analytical and Applied Pyrolysis
M1 - 105678
ER -