水热碳化法强化印染污泥脱水及碳化产物高值化利用的研究  

Enhancing Dewatering Performance of Printing and Dyeing Sludge by Hydrothermal Carbonization Method and High-Value Utilization of the Derived carbonization products

作　　者：袁道迎 徐振佳 陈中明 颜素 张雪英 YUAN Daoying;XU Zhenjia;CHEN Zhongming;YAN Su;ZHANG Xueying(Nanjing Wondux Environmental Protection Technology Corp.,Ltd.,211100,Nanjing,China;School of Environmental Science and Engineering,Nanjing Tech University,211816,Nanjing,China)

机构地区：[1]南京万德斯环保科技股份有限公司,江苏南京211100 [2]南京工业大学环境科学与工程学院,江苏南京211816

出　　处：《水处理技术》2025年第2期61-67,共7页Technology of Water Treatment

基　　金：国家自然科学基金项目(42207296)。

摘　　要：本文以水热碳化法处理印染污泥以提高其脱水性能,并在此基础上采用KOH活化联合高温热解法将水热碳化产物制备成污泥活性碳,探究其对碘的吸附性能。结果表明,经过水热碳化处理后(温度180℃,反应时间4 h),预酸化污泥(pH=5.0)的结构破坏、细胞破碎、固体颗粒和水分结合形态改变,含水率从~85%降至<45%,脱水性显著提高。基于正交实验,污泥活性炭最优制备条件为:热解温度550℃、KOH浓度0.5 mol/L、KOH活化时间2 h。该条件下,污泥活性炭比表面及其对碘离子吸附值分别达到626.36 m^(2)/g和547.8 mg/g,比未经水热碳化预处理污泥分别提升了55.51%和43.85%。总之,本文研究为剩余污泥高值化利用提供了新思路。In this study,printing and dyeing sludge from Shandong Province underwent hydrothermal carbonization to enhance dewatering performance.The resulting hydrochar was subsequently transformed into sludge-based activated carbon via KOH activation and high-temperature pyrolysis,and then applied to remove iodine ions from wastewater through adsorption.Under hydrothermal conditions(pH 5.0,180℃,4 h),the sludge's moisture content decreased from approximately 85%to below 45%.This reduction is attributed to the destruction of sludge structure,cell disruption,and alterations in the bonds between solid particles and water,thereby facilitating subsequent standardized disposal.Furthermore,the hydrochar was converted into activated carbon with a high specific surface area(626.36 m^(2)/g)under conditions of 0.5 mol/L KOH,550℃pyrolysis temperature,and 2 h activation time.This material achieved an iodine adsorption capacity of 547.8 mg/g.Compared with sludge biochar produced without hydrothermal carbonization,the specific surface area and iodine adsorption capacity increased by 55.51%and 43.85%,respectively,under identical pyrolysis conditions.Overall,this study provides a new approach for the high-value utilization of residual sludge.

关 键 词：污泥水热碳化 脱水性能 高温热解 KOH活化 污泥活性碳 

分 类 号：O643.36[理学—物理化学] X703[理学—化学]