摘要
运行两个相同的升流式厌氧污泥床（UASB）反应器R1和R2，设定两个反应器的初始污泥负荷（MCOD／（Mvss·d））分别为0，12、0，17kg／（kg·d），并根据COD去除情况逐步地提高污泥负荷水平，在运行过程中控制R2的污泥负荷始终高于R137％～40％，以此来研究污泥负荷对颗粒污泥快速形成的影响。实验结果表明，R2内颗粒污泥的形成速率高于R1，其污泥负荷在达到0．29～0．51kg／（kg·d）时，开始形成大量的厌氧颗粒污泥。最终R2内形成的颗粒污泥粒径为1，00～4．00mm的占36.1％，并有6.3％的颗粒污泥粒径在4，00mm以上；而R1中这两个粒径范围的颗粒污泥仅为11．8％和1．2％。同时R2内较大的污泥负荷也使其产生的颗粒污泥具有相对较高的VSS／TSS。最终得出结论，0.29～0.51kg／（kg·d）的污泥负荷能加速厌氧颗粒污泥的形成过程，而低于这个污泥负荷则不利于颗粒污泥的形成。
Two identical up-flow anaerobic sludge blanket （UASB） reactors （R1 and R2） were operated at dif- ferent sludge loading rates （SLR） to determine the effect of SLR on the formation of sludge granules in UASB. The SLR of R1 and R2 were increased from 0.12 and 0. 17 kg COD/（ kg VSS · d）, respectively, stepwise based on the reactor performance; SLR of R2 was kept at 37%-40% higher than that of R1 during the entire study. The sludge granulation took place more rapidly in R2 which also had a higher VSS/TSS and more of larger granules. At the end of the experiment, 36.1% of sludge granules were of 1.00-4.00 mm in diameter and 6.3%〉4.00 mm in R2 relative to 11.8% and 1.2%, respectively, in R1. Sludge granulation began at a SLR of 0.29 kg COD/（ kg VSS · d）, and the granules were formed more rapidly as the SLR increased to 0.51 kg COD/（ kg VSS· d）.
出处
《环境污染与防治》
CAS
CSCD
北大核心
2008年第1期44-47,51,共5页
Environmental Pollution & Control
基金
国家首批环保示范项目
