厌氧/好氧交替下SBR的短程硝化研究  

Shortcut Nitrification in SBR under Alternating Anaerobic/Aerobic Conditions

作　　者：桂丽娟[1,2] 彭永臻[2,3] 彭赵旭[2] 

机构地区：[1]安徽国祯环保节能科技股份有限公司,安徽合肥230088 [2]哈尔滨工业大学市政环境工程学院,黑龙江哈尔滨150090 [3]北京工业大学环境与能源学院,北京100022

出　　处：《中国给水排水》2013年第9期20-23,28,共5页China Water & Wastewater

基　　金：国家水体污染控制与治理科技重大专项(2008ZX07314-008-01);新加坡环境与水工业协会创新发展项目(EDB S07/1-53974092);国家自然科学基金资助项目(50778005)

摘　　要：为了研究过度厌氧对短程硝化的影响,采用SBR反应器,在pH值为7.2～8.0、温度为(23±0.5)℃的条件下,通过控制不同的厌氧段时间考察了厌氧/好氧交替方式下短程硝化的特点,分析了过度厌氧对亚硝酸盐积累率、亚硝化菌和硝化菌的比耗氧速率、脱氮除磷特性、同步硝化反硝化(SND)率及污泥沉降性的影响。结果显示,两个系统对氨氮的去除率都达到了96%,亚硝酸盐积累率稳定在70%左右,即过度厌氧对短程硝化无明显影响;硝化过程中发生了明显的同步脱氮现象,而且在小于0.4 mg/L的范围内,平均溶解氧浓度越高则SND率越高;除磷率都达到了95%,过度厌氧不会增加厌氧阶段的释磷量,吸磷主要发生在好氧前0.5 h,DO浓度越高则吸磷速率越快;两个系统的污泥沉降性都得到了改善,过度厌氧对抑制丝状菌膨胀的强化作用不大。To study the effect of excessive anaerobic condition on shortcut nitrification, the charac- teristics of alternating anaerobic/aerobic shortcut nitrification were investigated by controlling different an- aerobic times in sequencing batch reactors （SBR） with pH of 7.2 to 8.0 and temperature of （23±0.5）℃. The effects of excessive anaerobic condition on nitrite accumulation rate, SOUR, phosphorus removal characteristics, SND rate and SVI were analyzed. The results showed that in the two systems the removal rates of ammonia nitrogen were both 96% and nitrite accumulation rates were stabilized at around 70% , suggesting that excessive anaerobic condition had no significant effect on shortcut nitrification; the simul- taneous nitrogen removal occurred during nitrification, and SND rate increased with increasing DO con- centration within the range of 0.4 mg/L; the phosphorus removal rates in both systems were 95%. Ex- cessive anaerobic condition did not cause an increase in anaerobic phosphorus release. Phosphorus uptake occurred within 0.5 h of aerobic stage, and the phosphorus uptake increased with dissolved oxygen; sludge settleability in the two systems improved. The effect of excessive anaerobic condition on inhibitingfilamentous sludge bulking was not remarkable.

关 键 词：SBR 交替厌氧 好氧 过度厌氧 短程硝化 同步硝化反硝化 沉降性 

分 类 号：X703[环境科学与工程—环境工程]