外循环生物流化床挂膜启动研究

摘要

An experimental external biological circulating fluidized bed was designed.The effects of carrier fill rate,aeration rate,hydraulic retention time (HRT),C/N (mass fraction) on the formation of biofilm on coconut shell active carbons during the start of the reactor were studied.The results showed the suitable condition of the start was 5% (volume fraction) carrier fill rate,80 L/h aeration rate,8 h HRT and 8-10 C/N of the influent.%自行设计了一台小型外循环生物流化床,并研究了该流化床处理垃圾渗滤液启动过程中,载体填充率、曝气量、水力停留时间(HRT)和进水碳、氮质量比(C/N)对椰壳活性炭载体表面生物膜形成的影响.结果表明,挂膜启动过程中较合适的条件为载体填充率5%(体积分数)、曝气量80 L/h、HRT 8 h、进水C/N 8~10.