ZHANG Hui-wen,DAI Xiao-xuan,JIANG Wei,et al.Reduction and Water Forms of Municipal Sludge Treated by Hydrothermal Reaction[J].China Water & Wastewater,2021,37(7 7):96-100.
Reduction and Water Forms of Municipal Sludge Treated by Hydrothermal Reaction
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
7 7
Page:
96-100
Column:
Date of publication:
2021-04-01
- Keywords:
- municipal sludge; hydrothermal treatment; reduction; water form; hydrogen
- Abstract:
- The current disposal of municipal sludge is restricted by high water content which is hard to be removed. As hydrothermal treatment technology can realize efficient sludge reduction over dewatering process with high energy consumption, reduction of municipal sludge and water forms in the hydrothermal reaction were explored, and the effective reduction of municipal sludge treated by hydrothermal technology was clarified from the perspective of performance and mechanism. When the hydrothermal treatment reaction temperature was controlled at 500 ℃, the mass of municipal sludge was reduced by 87.60%, and the removal efficiency of organic matter reached 62.7%. Reduction of municipal sludge included 3 stages during hydrothermal treatment process, namely release of intracellular water, reduction of solid residue water content and improvement of solid phase product dewatering performance. The hydrothermal technology had the best treatment performance and economic benefit when the oxide ratio was controlled at 0.2.
Last Update:
2021-04-01