短程硝化颗粒污泥的快速培养与硝化特性研究  

STUDY ON THE RAPID CULTIVATION OF SHORT-RANGE NITRIFYING GRANULAR SLUDGE AND THE NITRIFICATION CHARACTERISTICS

作　　者：刘国洋[1] 李军[1] 赵白航[1] 王昌稳[1] 王永磊[1,2] 刘伟岩[1,3] 

机构地区：[1]北京工业大学北京市水质科学与水环境恢复工程北京市重点实验室,北京100124 [2]山东建筑大学市政与环境工程学院,济南250101 [3]北京城市排水集团有限责任公司,北京100022

出　　处：《环境工程》2013年第5期85-90,共6页Environmental Engineering

基　　金：国家自然科学基金(51078008);北京市自然科学基金(8122005);北京市教委面上项目(KM201210005028);北京市科技创新平台资助项目(004000546612010)

摘　　要：以城市污水处理厂剩余污泥为种泥,以2 min沉淀时间为选择压,在序批式反应器(SBR)中快速培养出好氧颗粒污泥。经过60个周期(20 d),反应器内出现砂粒状颗粒,并持续稳定运行120 d。成熟的颗粒污泥平均粒径856.56μm,具有良好的硝化性能。SBR反应器以固定曝气时间方式运行,亚硝酸盐积累率达80%以上,实现了稳定短程硝化。试验结果表明:絮体污泥(即接种污泥)与颗粒污泥的硝化过程相似但略有差异。二者差别在于,氨氮氧化结束后,继续曝气120 min,絮体污泥将亚硝酸盐完全转化为硝酸盐,而颗粒污泥仅将部分亚硝酸盐转化且过程比较缓慢。Taking the waste sludge gained from municipal wastewater treatment plants as seed sludge,aerobic granular sludge was rapidly cultured in a sequencing batch reactor through the selection pressure formed by 2 min settling time.Granular sludge in shape of sand appreaed in the 60th circle（20 d）,and was operated for 120 d.The formed granular sludge has an average diameter of 856.85 μm,which has a good nitrification performance.A steady partial nitrification was achieved in the sequencing batch reactor that operated in an fixed aeration time,the nitrite accumulation rate（NO2-N / NOx-N） was over 80%.The result of batch test indicated that the nitrification processes of flocs sludge and granular sludge were similar but had a diffierence.The difference was that a continuous 120 min aeration after the end of ammonia oxidation,the flocs sludge would convert nitrite to nitrate completely,however,the procedure of granular was very slow and only a small part of nitrite was converted.

关 键 词：序批式反应器 好氧颗粒污泥 短程硝化 

分 类 号：X703[环境科学与工程—环境工程]