Abstract:To investigate the effect of different concentration ratios of propionate to acetate on phosphorus removal in single-stage oxic process, two lab-scale sequencing batch reactors (SBRs) were operated (R1: propionate to acetate ratio=0.165; R2: propionate to acetate ratio=2.00) using synthetic wastewater. After a period of sludge acclimation (30d), R2 showed a higher SOP removal efficiency than R1. The average efficiency of phosphorus removal in R1 and R2 were 77.95% and 84.79% respectively. However, the phosphorus removal amount per MLVSS in R1 was higher than R2. The phosphorus removal amount per MLVSS in R1 was 8.66mg/g while in R2 was 8.03mg/g. In the idle phase, though obvious phosphorus release was observed in both R1 and R2, the content of phosphorus released in R2 was higher than that in R1. The phosphorus release amount per MLVSS of R2 was higher than R1. Besides, glycogen in R1 degraded obviously while that in R2 seldom degraded, which maybe the reason why the phosphorus release amount per MLVSS of R2 was higher than R1.
常克, 李小明, 王冬波, 杨麒, 曾光明. 不同丙酸盐/乙酸盐比对单级好氧生物除磷的影响[J]. 中国环境科学, 2011, 31(3): 371-376.
CHANG Ke, LI Xiao-Ming, WANG Dong-Bo, YANG Qi, ZENG Guang-Ming. Effect of different ratios of propionate to acetate on phosphorus removal in sequencing batch reactor with single-stage oxic process. CHINA ENVIRONMENTAL SCIENCECE, 2011, 31(3): 371-376.