CW-MFC系统对Pb²⁺去除率及其电性能的数值模拟研究

【作者】 王锦； 韩煦葳； 李瑾； 于忠军； 王丽；

【机构】 哈尔滨工业大学能源科学与工程学院； 哈尔滨热电有限责任公司；

【摘要】 人工湿地耦合微生物燃料电池（CW-MFC）技术可以同时利用基质、植物和微生物对重金属废水进行净化,兼具产电和污水处理能力。为探究其对水中Pb²⁺去除率及CW-MFC系统的电性能,本文将稀物质传递、流场和电场三场耦合,建立了CW-MFC物理模型,采用数值模拟的方法进行研究。结果表明适当提高CH₃COO^-浓度可提高输出电压,浓度为4 mol/m³时输出电压最大,为578mV。随Pb²⁺浓度增大输出电压呈现出先增大后减小的趋势。实验柱的容积越小,系统对Pb²⁺的响应越敏感。CW-MFC系统下层火山石总吸附率呈现出中间大四周小,活性炭层与之相反。系统对Pb²⁺的最大处理能力为10.92mg/L,浓度小于10.92mg/L时,系统对Pb²⁺的去除率保持在98%以上。更多还原

【Abstract】 Constructed wetland-microbial fuel cell system technology can simultaneously purify heavy metal wastewater using substrates, plants and microorganisms, with both electricity production and wastewater treatment capabilities. To investigate its Pb²⁺removal rate from water and the electrical performance of CW-MFC system, this paper coupled three fields, namely dilute matter transfer, flow field and electric field, and established a CW-MFC physical model, which is investigated by numerical simulation.The results show that the output voltage can be increased by increasing the CH₃COO concentration, and the maximum output voltage is 578 mV at a concentration of 4 mol/m³.The output voltage shows a trend of increasing and then decreasing with increasing Pb²⁺concentration. The smaller the volume of the experimental column, the more sensitive the response of the system to Pb²⁺. The maximum treatment capacity of the system for Pb²⁺was 10.92 mg/L, and the removal rate of Pb²⁺ by the system was maintained above 98%when the concentration was less than 10.92 mg/L.更多还原