AMBR结构及水力负荷优化研究

Study on optimization of AMBR structure and its hydraulic loading

为了对厌氧迁移式污泥床反应器(AMBR)的运行条件进行优化,采用自制AMBR,在进水CODCr的质量浓度为3 000 mg/L的条件下,考察了导流板与挡板间距、HRT对反应器运行效果的影响。结果表明:导流板与挡板间距对CODCr去除效果的影响不大,但较小间距时废水的流速快,有利于与污泥混合。当HRT从31 h缩短为12 h时,CODCr去除率仍然能稳定维持在80%以上,最佳HRT为21 h,此时CODCr的去除率为90%。由于反应器各格室的污泥浓度接近、产酸菌及产甲烷菌的均衡分布及缓冲进水的影响,使得反应器的CODCr去除率高,抗冲击负荷能力强,运行过程中没有发生堵塞现象。

For the purpose of optimizing the operation condition of anaerobic migrating blanket reactor （AMBR）, a self-made AMBR was adopted, and then, the influences of spacing between deflector and baffle and HRT on its operation effect under the condition that the mass concentration of CODc~ in the influent water was 3 000 mg/L were investigated. The results showed that, the spacing between deflector and baffle was with little effect on CODcr removal; but smaller spacing was conducive to a mixture of sewage and sludge because of high- speed flow. When the HRT was shortened from 31 to 12 h, the removal rate of CODc~ could still be maintained at above 80% stably, therefore, the optimal HRT was 21 h and the removal rate of CODcr could reach 90%. Profit from the similar sludge concentration of each chamber, the equalizing distribution of acid-forming bacteria and methane-producing bacteria, and the buffer influent water feature, AMBR had a high CODcr removal efficiency and strong resistance to shock load, therefore, no clogging was observed during the operation process.