好氧移动床生物膜反应器挂膜启动过程

Start-up in Aerobic Moving-Bed Biofilm Reactor

采用移动床生物膜反应器处理生活污水,考察了接种污泥质量浓度对挂膜启动过程的影响,同时对启动过程中微生物相的变化、悬浮污泥的影响进行了初步分析.结果表明:在不添加接种污泥的条件下,反应器能够在两周内完成挂膜启动,载体上附着微生物生长稳定时挥发性悬浮污泥(VSS)质量浓度达1.2 g/L;载体上微生物的附着生长主要可分为3个阶段:适应期、增长期以及稳定期,不同阶段微生物相的种群分布不同,各有其特征微生物存在;反应器在挂膜启动过程中,接种所需的临界活性污泥质量浓度在0.1 g/L以下.

In this study, aerobic moving bed biofilm reactor （MBBR）, fed with domestic wastewater, was used to investigate the influence of inoculated sludge concentration on biofilm development, and the change of microbial community. The results showed that there was no negative influence on biofilm growth without inoculating sludge, and the concentration of attached biomass stabilized at 1.2g/L after two-weeks operation. Biofilm development in MBBR could be divided into three phases including the adaptation, the rapid growth and the stabilization. In addition, it was concluded that a very low critical concentration of inoculated sludge below 100 mg/L, was required during the start-up.