污泥基生物炭对污水处理厂出水中氮、磷吸附性能研究  

Adsorption Performance of Sludge Based Biochar for Nitrogen and Phosphorus in Effluent from Sewage Treatment Plant

作　　者：于涵 周亚平 姜艳艳 马岚 刘俊良[1] YU Han;ZHOU Yaping;JIANG Yanyan;MA Lan;LIU Junliang(College of Urban and Rural Construction,Agricultural University of Hebei,Baoding 071000,China)

机构地区：[1]河北农业大学城乡建设学院,河北保定071000

出　　处：《水处理技术》2025年第3期54-59,共6页Technology of Water Treatment

基　　金：河北省重点研发计划项目(22323802D);河北省科技计划项目(215A9908D);河北农业大学人才引进专项(YJ2021049)。

摘　　要：随着污水处理厂排放标准的日趋严格,出水氮磷超标风险进一步加大。以市政污泥为原材料,制备了污泥基生物炭,并进行了改性前、后对比实验。研究了污泥基生物炭投加量、初始pH、共存离子、初始浓度、吸附时间等因素对同步吸附污水处理厂出水中氮、磷去除的影响。结果表明,BC、Mg-BC对氮磷的吸附过程均符合准二级动力学方程和Langmuir模型,Mg-BC对氮磷最大吸附容量为20.82、36.81 mg/g;该吸附是以化学吸附为主的单层吸附;当进水氮、磷浓度小于5 mg/L时,经Mg-BC吸附后的出水氮、磷浓度能够满足《地表水环境质量标准》(GB 3838-2002)Ⅴ类标准(ρ(NH3-N)<2 mg/L)、Ⅲ类标准(ρ(TP)<0.2 mg/L);研究表明,污泥基生物炭具有良好的吸附和重复利用性能。With increasingly stringent discharge standards at sewage treatment plants,the risk of non-compliance for effluent nitrogen and phosphorus has risen.In this study,sludge-based biochar was prepared from municipal sludge and assessed before and after modification.Experiments investigated the effects of biochar dosage,initial pH,co-existing ions,initial concentration,and adsorption time on nitrogen and phosphorus removal in the effluent of a synchronous adsorption wastewater treatment plant.Results showed that both unmodified biochar(BC)and magnesium-modified biochar(Mg-BC)followed quasi-second-order kinetics and the Langmuir model,with Mg-BC exhibiting maximum adsorption capacities of 20.82 mg/g for nitrogen and 36.81 mg/g for phosphorus.The adsorption mechanism was identified as monolayer chemisorption.When influent nitrogen and phosphorus concentrations were less than 5 mg/L,the effluent after Mg-BC adsorption complied with Class V requirements for NH₃-N(<2 mg/L)and Class III requirements for TP(<0.2 mg/L)under the Surface Water Environmental Quality Standard(GB 3838-2002).These findings confirm that sludge-based biochar demonstrates both strong adsorption performance and reusability,indicating its potential for advanced wastewater treatment.

关 键 词：氮磷超标 市政污泥 生物炭 同步吸附 重复利用 

分 类 号：X703[环境科学与工程—环境工程]