摘要
以厌氧/好氧方式运行SBR反应器处理实际生活污水，考察沉淀时间对培养具有除磷功能的好氧颗粒污泥（aerobic granular sludge，AGS）的影响。在沉淀时间降低为6min时，出现了AGS；在沉淀时间降低为4min的第6天，AGS培养成熟，肉眼可见。从降低沉淀时间到AGS培养成熟共耗时28d。AGS培养及稳定运行阶段，出水磷含量平均在0.92mg／L左右，最低为0mg／L，最高为3．34mg／L。具有除磷功能的AGS成熟时，其周围有大量的浮游累枝虫。AGS粒径范围为0.0-0.3mm、0．3-0．6mm及〉0．6mm的质量分数分别为44．88％，51．61％及3．51％，AGS与絮状污泥共存。与具有短程硝化功能的AGS相比，周期性的厌氧，好氧更有利于AGS的稳定维持，具有除磷功能的AGS远比具有短程硝化功能的AGS密实。试验结果表明在沉淀时间选择压的作用下，具有除磷功能的AGS形成的过程可分为3阶段：筛选-聚集-成熟。
The real domestic wastewater was treated in SBR under alternate anaerobic/aerobic conditions.The effect of decreasing settling time on the formation of aerobic granular sludge(AGS)for phosphorus removal was investigated.Small AGS appeared when the settling time was 6 min;the settling time was changed to 4 min after 6d,at the same time,the AGS was mature.It spent 28d to cultivate AGS for phosphorus removal after the settling time was gradually decreased.The average effluent phosphorus concentration was 0.92 mg/L,maximum value was 3.34 mg/L and minimum value was 0 mg/L.There were lots of epistylis rotans around the AGS.The diameter percentage of the granules between 0.0-0.3 mm,0.3-0.6 mm and >0.6 mm was 44.88%,51.61% and 3.51% respectively,the floc-like activated sludge and AGS coexisted.The control of alternate anaerobic/aerobic conditions made the phosphorus removal AGS more compact than short-cut nitrifying AGS and this method is favorable for the stable maintenance of AGS.The results show that under the selective pressure of settling time,aerobic sludge granulation can be divided into three phases:selection of good settling zoogloea,self-aggregation and maturation.
出处
《环境工程》
CAS
CSCD
北大核心
2008年第1期15-18,共4页
Environmental Engineering
基金
国家自然科学基金项目(50508001)
北京市教育委员会科技发展计划面上项目(KM200510005020)
北京市科技新星计划项目A类(2006A10)
关键词
除磷
好氧颗粒污泥
实际生活污水
快速启动
沉淀时间
phosphorus removal,aerobic granular sludge,real domestic wastewater,rapid start-up and settling time
