镧钙改性污泥/小麦秸秆水热炭除磷的工艺条件优化  

Optimization of process conditions for phosphorus removal using lanthanum calcium modified sludge/wheat straw hydrothermal carbon

作　　者：陶辰瀚 龚为进[1] 蔺鸿涛 祁超智 黄磊 余正洋 TAO Chenhan;GONG Weijin;LIN Hongtao;QI Chaozhi;HUANG Lei;YU Zhengyang(School of Energy and Environment,Zhongyuan University of Technology,Zhengzhou 450007,China)

机构地区：[1]中原工学院能源与环境学院,河南郑州450007

出　　处：《中原工学院学报》2024年第4期69-75,79,共8页Journal of Zhongyuan University of Technology

基　　金：2022年中原工学院基本科研业务费专项资金项目(K2022YY007)。

摘　　要：以市政污泥为研究对象,磷酸二氢钾为目标污染物,采用碱沉淀与一步水热法制备多金属改性污泥/小麦秸秆水热炭。为得到高单位吸附量的最佳制备条件,研究La/Ca摩尔比、污泥/小麦秸秆质量比、水热温度、水热时间和固液比单因素对单位吸附量的影响,并在单因素实验基础上应用响应曲面法优化,确定了最佳制备条件的水热温度为170℃,水热时间为8.5 h,固液比为0.02。在此条件下制得生物炭的单位吸附量为84.19 mg/g,与预测值82.21 mg/g基本吻合。The research focuses on the removal of phosphorus from municipal sludge,with potassium dihydrogen phosphate as the target pollutant.Multi-metal modified sludge/wheat straw hydrothermal char is prepared using alkali precipitation and one-step hydrothermal method.To obtain the optimal preparation conditions for high unit adsorption capacity,the effects of La/Ca molar ratio,sludge/wheat straw mass ratio,hydrothermal temperature,hydrothermal time,and solid-liquid ratio on unit adsorption capacity are studied.Based on single-factor experiments,response surface methodology is applied to optimize the conditions.The optimal hydrothermal temperature is determined to be 170℃,hydrothermal time 8.5 hours,and solid-liquid ratio 0.02.Under these conditions,the unit adsorption capacity of the biochar is 84.19 mg/g,which closely matches the predicted value of 82.21 mg/g.

关 键 词：市政污泥 水热炭化 生物炭 响应曲面法 除磷 

分 类 号：X705[环境科学与工程—环境工程]