摘要
在5个序批式活性污泥反应器（R1~R5,碳源葡萄糖和乙酸投加比以COD计时分别为0：100%、25%：75%、50%：50%、75%：25%、100%：0）中,采用人工合成污水,研究了不同葡萄糖和乙酸投加比对EBPR系统除磷效果及微生物群落结构的影响。结果表明,第20-80天,葡萄糖和乙酸投加比以COD计时分别为25%：75%和50%：50%的反应器R2和R3,与100%乙酸为碳源的R1相较,显示出了更好的除磷效果,其中R3最佳,平均除磷效率达到96%以上。葡萄糖含量越大的反应器,系统p H越低;从R2到R5,厌氧释磷量逐渐降低。随着运行时间,含葡萄糖为碳源的反应器,相对于100%乙酸为碳源的反应器,除磷效果较不稳定。不同葡萄糖和乙酸中投加比的EBPR系统微生物群落结构差异较大,DGGE图谱的主要条带明显不同,相似性均低于63%。
In 5 sequencing batch reactors（R1~R5, fed with glucose/acetate in the ratio of 0, 25%：75%, 50%：50%, 75%：25%, 100% respectively in terms of COD）, the effect of different ratios of glucose/acetate on phosphorous removal of EBPR system and microbial community structure was investigated.After a period of sludge acclimation（20 d）, R2 and R3 showed higher phosphorus removal efficiency than R1, simultaneously R3 performed best with a phosphorus removal efficiency of more than 96%. Results also showed that the higher concentration of glucose, the lower p H in the reactor. Besides, the anaerobic phosphorus release reduced gradually as the glucose concentration increased from R2 to R5. After running a period of time, the glucose containing reactors showed less stability compared to R1 in which acetate was the sole carbon source. The analysis of DGGE profiles demonstrated that the major bands in different lanes of sludge samples were quite distinct from each other, and the microbial community structure in different reactors had very low similarity, less than 63%, which manifested that different ratios of glucose to acetate probably had a great influence on the microbial community structure in EBPR system.
出处
《水处理技术》
CAS
CSCD
北大核心
2014年第11期37-42,47,共7页
Technology of Water Treatment
