摘要
采用乙醇模拟废水在体外曝气循环式SBR内培养好氧颗粒污泥以研究其特性及其表观基质降解动力学.反应器启动后第8d,系统内观察到平均粒径约为0.3mm的初始颗粒污泥,随着有机负荷逐步提高到4.0gCOD/(L·d),好氧颗粒污泥逐渐成熟,其粒径范围为0.7~1.6mm,沉降速率为16.9~32.4m/h.成熟好氧颗粒污泥的比耗氧速率(SOUR)达到了31.24mgO2/(gMLSS·h),是活性污泥的1.5倍.此外,动力学模拟结果表明,相应的最大表观降解速率k和表观半速率常数K分别为5.91d^-1和1990.15mg/L.
To investigate the properties and kinetics of aerobic granular sludge, aerobic granules were cultivated with ethanol synthetic wastewater in a series of sequencing batch reactors (SBR). The spherical shaped granules were observed on 8^th day with the mean diameter of 0. 3mm. With the organic loading rate (OLR) being increased to 4. 0gCOD/( L ·d) , aerobic granules grew matured with spherical shape. The size of granules ranged from 0. 7 to 1.6mm, and the corresponding settling velocity of individual granule was 24. 2 - 36. 4m/h. The oxygen uptake rate (SOUR) of mature granules was 31.24mgO2/( gMLSS·h), which was 1.5 times higher than that of activated sludge (20. 24mgO2/( gMLSS · h) ). The experimental data indicated that the substrate utilization kinetics generally followed Monod' s kinetics model, the corresponding kinetic coefficients of k ( maximum specific substrate utilization rate) and Ks( half velocity coefficient) were 5.91d^-1 and 1 990. 15mg/L respectively.
出处
《哈尔滨理工大学学报》
CAS
2007年第3期133-136,共4页
Journal of Harbin University of Science and Technology