摘要
通过引入驯化成熟的好氧颗粒污泥,研究膜生物反应器处理模拟生活污水过程中好氧颗粒污泥特性及好氧颗粒污泥微观结构.研究结果表明:好氧颗粒污泥膜生物反应器中总污泥浓度随运行时间的延长而增加,而好氧颗粒污泥浓度却降低,絮状污泥浓度呈稳步增加趋势.反应器内好氧颗粒污泥趋于小粒径化,由初始的3 mm降至2 mm,颗粒污泥的沉降性能恶化.污泥混合液中存在高浓度的胞外多聚物和溶解性有机物,且随反应器运行时间的延长而显著增加.溶解性有机物浓度随时间的变化趋势与胞外多聚物相同.通过电镜观察,好氧颗粒污泥外部为好氧区,内部为厌氧区,表面微生物以丝状菌为主,内部以长杆菌为主.
The purpose of this study was to discuss the characteristics of sludge mixed liquor, as well as microbial structure of aerobic granular sludge in MBR. It found that the total sludge concentration of aerobic granular sludge increased, but the concentration of aerobic granular sludge declined gradually in aerobic granular sludge MBR. However the floc sludge concentration showed increasing steadily gradually in aerobic granular sludge MBR. The mean diameter of aerobic granular sludge decreased from 3mm to 2ram,and its settlement performance deteriorated with time in aerobic granular sludge MBR. The large number of EPS and soluble products produced and their concentrations increased gradually in MBR. The soluble products concentration and ESP had the same trend. By the mean of electric microscope, The microstructure of aerobic granular sludge was divided into two areas, external aerobic zone and internal an aerobic zone, filamentous bacteria inhabited mainly on the surface of the aerobic granular sludge,and bacillus mainly existed inside of it.
出处
《南京师范大学学报（工程技术版）》
CAS
2014年第1期87-92,共6页
Journal of Nanjing Normal University(Engineering and Technology Edition)
