SBR工艺运行条件对好氧污泥颗粒化和除磷效果的影响

采用模拟配制生活污水,研究循序间歇反应器(SBR)工艺在不同运行条件下对好氧污泥颗粒化和生物除磷效果的影响.试验分别对进水中不同COD/TN比(11.79,18.85,20.72,24.66)、COD/TP比(27.85,44.53,48.93、58.25)、TN/TP比(4.00,2.36,1.54)、温度(22℃,15℃,8℃)和污泥龄(16d,10d,5d)作比较,发现进水中较高的COD/TN比(24.66)、COD/TP比(58.25)、温度(22℃)和较低的污泥龄(10d)对生物除磷和颗粒的形成有利;适当的TN/TP比(2.36)、接种污泥的选择是好氧颗粒污泥形成的关键.

Aerobic Sludge Granulation and Biological Phosphorus Removal in Different Operating Conditions of SBR

This paper investigate the effect of the different operating conditions on the aerobic sludge granulation and biological P removal characteristics in SBR by using synthetic domestic wastewater as feed. Different ratios of COD/TN (11.79, 18.85, 20.72, 24.66), COD/TP (27.85, 44.53, 48.93, 58.25), TN/TP (4.00, 2.36, 1.54), temperature(22 degrees C, 15 degrees C, 8 degrees C) and sludge retention time(16d, 10d, 5d) are tested in this process. It is found that the high ratios of COD/TN (24.66), COD/TP (58.25), temperature (22 degrees C) and low SRT (10d) are beneficial to the phosphorus removal and the cultivation of the aerobic granular sludge. The proper TN/TP rate (2.36), dissolved oxygen and selection of anaerobic seed sludge are basic requirement and most important factors to guarantee such aerobic granules in the process.