Wu Bing-tao, Zhou Wei-li, Zhang Zhen-jia, Cheng Xue-hang, Dong Ya-mei, Chi Li-na
School of Environmental Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, China.
Huan Jing Ke Xue. 2009 Oct 15;30(10):2946-51.
In order to overcome the disadvantages of the anaerobic reactor such as slow growth and long start-up, the flocculent anaerobic sludge was embedded and used as the seed sludge in the anaerobic treatment of PTA wastewater with the objective of keeping biomass in the reactor. The start-up characteristics of the UASB reactor were investigated. During the 136 days' running, COD removal rate of PTA wastewater achieved 75%-85% at the volumetric loading rate (COD) of 3 kg x (m3 x d)(-1) and the hydraulic retention time (HRT) of 3-4 day. The anaerobic system had good stability and biomass retaining ability. On the other hand, variations of EPS, SEM observation and methanogens DNA in sludge granules verified the growth of immobilized bacteria in both quantity and microorganism morphology, although mass transfer through the immobilization media was to some degree limited.
为克服厌氧反应器生长缓慢、启动时间长等缺点，采用包埋絮凝厌氧污泥作为种子污泥用于对苯二甲酸（PTA）废水的厌氧处理，目的是保持反应器内的生物量。研究了上流式厌氧污泥床（UASB）反应器的启动特性。在136天的运行期间，当容积负荷率（化学需氧量（COD））为3 kg·(m³·d)⁻¹、水力停留时间（HRT）为3 - 4天时，PTA废水的COD去除率达到75% - 85%。该厌氧系统具有良好的稳定性和生物量保留能力。另一方面，尽管通过固定化介质的传质在一定程度上受到限制，但胞外聚合物（EPS）的变化、扫描电子显微镜（SEM）观察以及污泥颗粒中产甲烷菌DNA的检测证实了固定化细菌在数量和微生物形态上的生长。
