[1]郭彦峰,张弛,孔鑫,等.碳化强度对市政污泥脱水性能及理化性质的影响[J].中国给水排水,2024,40(19):81-86.
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碳化强度对市政污泥脱水性能及理化性质的影响

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第40卷 期数: 2024年第19期 页码: 81-86 栏目: 出版日期: 2024-10-01
Title:
Effect of Carbonization Intensity on Dewatering Performance and Physicochemical Properties of Municipal Sludge
作者:
郭彦峰1,2， 张弛1， 孔鑫1， 袁进1， 杨志宏3， 吴博3， 张凌云4
（1.太原理工大学 环境科学与工程学院，山西 晋中 030600；2.中国市政工程华北设计研究总院有限公司 北京分公司，北京 100044；3.山西省正阳污水净化有限公司，山西 晋中 030600；4.山西新科联环境技术有限公司，山西 太原 030024）
Author(s):
GUO　Yan-feng1，2， ZHANG　Chi1， KONG　Xin1， YUAN　Jin1， YANG　Zhi-hong3， WU　Bo3， ZHANG　Ling-yun4
（1. College of Environmental Science and Engineering， Taiyuan University of Technology， Jinzhong 030600， China； 2. Beijing Branch， North China Municipal Engineering Design & Research Institute Co. Ltd.， Beijing 100044， China； 3. Shanxi Zhengyang Sewage Purification Limited Company， Jinzhong 030600， China； 4. Shanxi Xinkelian Environmental Technology Limited Company， Taiyuan 030024， China）
关键词:
市政污泥;  水热碳化;  碳化强度;  脱水性能;  官能团
Keywords:
municipal sludge;  hydrothermal carbonization;  carbonization intensity;  dewatering performance;  functional group
摘要:
将Ruyter开发的煤化模型应用于水热碳化预处理市政污泥，探究了碳化强度f对裂解液、水热碳理化性质及污泥脱水性能的影响。结果表明，经碳化强度f=0.12的预处理，污泥抽滤脱水后含水率可降至53%，相比未经预处理的对照组降低了28%；此外，提高碳化强度可促进NH4+-N、SCOD、TOC在裂解液中的释放，当碳化强度f=0.12时，SCOD、TOC含量分别高达18 210、8 685 mg/L，而NH4+-N含量在f≤0.21条件下随着碳化强度的增加而升高。另外发现，EPS中蛋白质和多糖含量与污泥脱水性能有很强的相关性；随着碳化强度的增大，水热碳表面的芳构化结构显著增多，亲水性含氧官能团减少，从而改善污泥脱水性能。将该工艺应用于污水厂，结果显示碳化后的污泥经板框压滤脱水，含水率可降至29%左右，脱水效果显著。
Abstract:
The coalification model proposed by Ruyter was employed in the pretreatment of municipal sludge through hydrothermal carbonization, and the influences of carbonization intensity f on the physicochemical properties of the pyrolysis solution, hydrothermal carbon, and the dewatering performance of sludge were examined. After pretreatment with a carbonization intensity of 0.12, the water content of the sludge could be reduced to 53%, which was 28% lower than that of the control group without pretreatment. In addition, enhancing the carbonization intensity could facilitate the release of NH4+-N, SCOD, and TOC in the pyrolysis solution. When the carbonization intensity was 0.12, the SCOD and TOC could respectively reach 18 210 mg/L and 8 685 mg/L, while the NH4+-N increased with the increase of carbonization intensity under the condition of f equal or less than 0.21. Additionally, it was discovered that the contents of protein and polysaccharide in EPS exhibited a significant correlation with the dewatering performance of sludge. As the carbonization intensity rose, the aromatization structure on the surface of hydrothermal carbon increased significantly, while the hydrophilic oxygen-containing functional groups decreased, thereby enhancing the sludge dewatering performance. The process was implemented in a sewage treatment plant. The results indicated that the water content of carbonized sludge could be reduced to approximately 29% through plate and frame filter press, and the dewatering performance was remarkable.

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更新日期/Last Update: 2024-10-01