味精废水处理中好氧颗粒污泥培养及其菌群研究

Research on the Cultivation of Aerobic Granule Sludge Using Monosodium Glutamate Wastewater and Its Flora

以某味精污水处理厂厌氧池的厌氧颗粒污泥作为接种污泥,通过控制运行条件,在序批式反应器(SBR)中,经过约125d的培养,最终形成了平均粒径为0.6mm的好氧颗粒污泥。研究表明,该好氧颗粒污泥具有良好的除污性能。成熟的好氧颗粒污泥对COD和NH+4-N的平均去除率分别达到了92.91%和96.25%。不同培养阶段的好氧颗粒污泥其群落多样性差别不大,且拥有共同的优势菌种。随着培养时间的推移,其优势菌种也在不断地演变。与厌氧颗粒污泥和活性污泥相比,好氧颗粒污泥的群落多样性更加丰富。

With anaerobic granular sludge as the inoculation sludge from a monosodium glutamate sewage plant and by controlling operational conditions, a particle of aerobic granular sludge is ultimately developed in sequencing batch reactor after the culture about 125 days, whose size is about 0.6 mm.The study shows that the aerobic granular sludge has good perfor- mance of decontamination. Mature aerobic granular sludge reaches the removal rate of COD and NI4＋ - N, 92.91% and 96.25% respectively. Aerobic granular sludge has the slightest difference in various culture stages, and shares the advan- tages of common strains. As the culture time passes, the dominant strains have evolved constantly. Compared with anaerobic granular sludge and activated sludge, aerobic granular sludge has rich community diversity.