电耦合生物滤池的建模、优化和控制  

Modeling,optimization,and control of biofilter microbial electrolysis cells

作　　者：韩煦葳 王丽[1] 王锦 HAN Xu-wei;WANG Li;WANG Jin(School of Energy Science and Engineering,Harbin Institute of Technology,Harbin 150001,China)

机构地区：[1]哈尔滨工业大学能源科学与工程学院,黑龙江哈尔滨150001

出　　处：《中国环境科学》2024年第11期6105-6113,共9页China Environmental Science

摘　　要：建立电耦合生物滤池(BF-MEC)系统物理模型和数学模型,对系统结构、反应机理和影响因素进行研究,描述了BF-MEC系统生物电化学消耗底物过程.模型参数根据在连续流生物滤池中获得的实验结果进行估计,采用CH_(3)COO^(-)、NH_(4)^(+)、NO_(3)^(-)模拟废水,探究系统最佳电极间距、电极位置、施加电压、HRT和微生物附着量对系统效能的影响,对系统进行优化控制.结果表明:BF-MEC系统最佳电极结构为电极间距100mm,阴极距实验柱出口150mm;污水在系统中水力停留时间>72h时,可使出水污染物满足国家规定中水回用标准;中水水质为一级B类时,将污染物离子全部去除所需施加的最小电压为0.55V;微生物附着量大于50%时,去除率随附着量增大而增大,附着量达到93.75%时,施加较小电压0.25V就可使污水中各离子去除率均大于99%.A physical model and mathematical model of the biofilter microbial electrolysis cell(BF-MEC)system were established to study the system structure,reaction mechanism,and influencing factors,and describe the bioelectrochemical consumption substrate process of the BF-MEC system.The model parameters were estimated according to the experimental results obtained in the continuous flow biofilter.Using CH_(3)COO^(-),NH_(4)^+,and NO_(3)^(-)to simulate wastewater,we explored the effects of the system's optimal electrode spacing,electrode position,applied voltage,hydraulic retention time(HRT),and microbial attachment amount on the system efficiency,and optimized and controlled the system.The simulation results showed that the optimal electrode structure of the BF-MEC system was an electrode spacing of 100mm and the cathode was 150mm from the outlet of the experimental column.When the hydraulic retention time of sewage in the system was greater than 72h,the effluent pollutants could meet the national reclaimed water reuse standard.When the reclaimed water quality was Class B of level one,the minimum voltage required to completely remove pollutant ions was 0.55V.When the microbial attachment amount was greater than 50%,the removal rate increased with the increase of the attachment amount.When the attachment amount reached 93.75%,a small voltage of 0.25V could make the removal rate of each ion in sewage greater than 99%.

关 键 词：BF-MEC 建模 生物电化学 模拟研究 

分 类 号：X703[环境科学与工程—环境工程]