基于HYDRUS-1D的改良土壤渗滤处理污废水模型研究  

Study on modified soil infiltration system model for wastewater treatment based on HYDRUS-1D

作　　者：吕晶晶[1] 石兰君 窦艳艳[1] 龚为进[1] 张列宇[3] Lv Jingjing;Shi Lanjun;Gong Weijin;Dou Yanyan;Zhang Lieyu(Zhongyuan Institute of Technology,Zhengzhou 450007,China;Second Institute of Geological Environment Survey,Bureau of Geology and Mineral Exploration and Development of Henan Province,Zhengzhou 450014;Chinese Research Academy of Environmental Sciences,Beijing 100012,China)

机构地区：[1]中原工学院,郑州450007 [2]河南省地质矿产勘查开发局第二地质环境调查院,郑州450053 [3]中国环境科学研究院,北京100012

出　　处：《环保科技》2022年第6期1-5,16,共6页Environmental Protection and Technology

基　　金：中国纺织工业联合会科技指导性项目(2016039);河南省高等学校供热空调重点学科开放实验室项目(2017HAC108);中原工学院青年骨干教师,河南省高等学校青年骨干教师培养计划(2019GGJS140);中原工学院引进博士科研启动经费资助。

摘　　要：用HYDRUS-1D软件模拟前置微纳米曝气改良土壤渗滤系统去除碳、氮、磷的过程。以物理和生化实验数据为基础,用对流-弥散方程,通过参数率定建立了与实测值相关性良好的土壤渗滤处理污水模型,用该模型可以模拟改良土壤渗滤系统去除污染物的过程。在参数率定阶段,发现对模拟结果影响最大的因素为溶质在反应相的反应速率常数μ,而弥散系数D_(L)和吸附系数K_(d)对溶质运移模拟结果的影响小于μ的影响。运用构建的模型对改良土壤渗滤系统中土壤组分的不同组合厚度进行污染物去除预测,结果表明,当粉土/粉质黏土5~140/175~40cm的组合厚度和粉质黏土/粉土140~180/40~0cm的组合厚度时,出水中COD_(Cr)、NH_(4)^(+)-N、NO_(2)^(-)-N、NO_(3)^(-)-N、TP模拟浓度值均最低。该研究为优化土壤渗滤介质结构提供了参考。The process of carbon,nitrogen and phosphorus removal was simulated by HYDRUS-1D software,in which the wastewater was treated by pre-micro-nano aeration modified soil infiltration system.Based on the physical and biochemical experimental data,the soil infiltration wastewater treatment model with good correlation with the measured values was established by using the convection dispersion equation and parameter calibration.The model could be used to simulate the process of pollutant removal by modified soil infiltration system.In the parameter calibration stage,it was found that the most influential factor on the simulation results wasμ,the reaction rate constant of solute in the reaction phase,while dispersion coefficient D_(L) and adsorption coefficient K_(d) had less impact than theμ.The model was used to predict the pollutant removal under different thickness combination of soil components in modified soil infiltration system.The results showed that the simulated concentrations of COD_(Cr),NH_(4)^(+)-N,NO_(2)^(-)-N,NO_(3)^(-)-N and TP were the lowest when the combined thickness of silt/silty clay was 5-140/175-40cm and the combined thickness of silty clay/silty clay was 140-180/40-0cm.This study provided a reference for optimizing the medium structure of soil infiltration system.

关 键 词：土壤渗滤 脱氮除磷 污染物运移 微纳米曝气 HYDRUS-1D 

分 类 号：X703[环境科学与工程—环境工程]