能源环境保护2024，Vol.38Issue(2)：198-207,10.DOI:10.20078/j.eep.20240309
城市污泥和浒苔共水热碳化参数响应面优化
Response surface optimization of co-hydrothermal carbonation parameters of municipal sludge and enteromorpha
摘要
Abstract
The increasing amount of municipal sludge poses a serious threat to the environment.Tradi-tional treatment methods still face various challenges in terms of harmlessness and resource utilization.Hydrothermal carbonization is considered an effective method for treating municipal sludge,but its low carbon and high ash characteristics limit the application of hydrochar as a fuel.To address this issue,the co-hydrothermal carbonization of municipal sludge and enteromorpha(a high-carbon and low-ash waste biomass)is proposed as a potential solution.In this study,co-hydrothermal carbonization experi-ments of municipal sludge and enteromorpha were conducted under various reaction conditions,inclu-ding temperatures ranging from 160 to 280 ℃,residence times ranging from 30 to 150 minutes,and municipal sludge proportions ranging from 0 to 100％.The impacts of these process parameters on ener-gy recovery efficiency(ERE)and electricity consumption index(ECI)were investigated.The response surface method was adopted to optimize the three main factors(temperature,time,and municipal sludge proportion)affecting ERE and ECI.The results indicated that the response surface models es-tablished by Central Composite Design exhibited a good fit(model P＜0.05,corresponding lack-of-fit P＞0.05),with minimal deviation between predicted values and actual values.Municipal sludge propor-tion had a significant impact on ERE(P＜0.05),while time exerted an extremely significant influence on ECI(P＜0.000 1).Temperature also had a significant impact on ECI(P＜0.05).Through mathe-matical model optimization,the optimal conditions for achieving the highest ERE(0.470)and the low-est ECI(165.61)were determined to be 216 ℃,83 minutes,and a 64％municipal sludge proportion,respectively.Additionally,a higher ERE(0.463)and lower ECI(171.60)could be obtained simulta-neously at 208 ℃,62 minutes,and a 52％municipal sludge proportion.To validate the results,three repeated experiments were conducted,and the errors between the experimental values and predicted values were found to be less than 5％.The findings of this study provide a scientific basis for the re-source utilization and high-value utilization of municipal sludge and enteromorpha.By optimizing the co-hydrothermal carbonization process,it is possible to enhance energy recovery efficiency and reduce electricity consumption,contributing to the sustainable management of municipal sludge and the preser-vation of the environment.关键词
城市污泥/浒苔/共水热碳化/响应面/过程参数优化Key words
Municipal sludge/Enteromorpha/Co-hydrothermal carbonation/Response surface method/Process parameter optimization分类
资源环境引用本文复制引用
支有为,徐东海,刘欢腾,徐铭欣,郑佩瑶..城市污泥和浒苔共水热碳化参数响应面优化[J].能源环境保护,2024,38(2):198-207,10.基金项目
国家重点研发计划资助项目(2021YFE0104900) （2021YFE0104900）
国家自然科学基金资助项目(22078258) （22078258）
