摘要
采用好氧颗粒污泥技术对水质波动较大、含大量工业废水的城市污水开展了中试研究。研究发现采用该类污水可成功培养出好氧颗粒污泥,占COD总量60%的颗粒态COD是导致所形成的颗粒不规则、结构松散且颗粒化进程较慢的主要原因。运行期间系统对COD、NH4+-N、TP的平均去除率分别为(75.80±16.09)%(、52.85±33.65)%(、66.57±22.36)%。当进水COD浓度较低时,系统的去除效果受到严重的影响。进水氨氮浓度的大幅度变化对颗粒污泥沉速、粒径的影响不明显,但对颗粒污泥密度的影响显著。氨氮冲击负荷是导致颗粒污泥解体的主要原因。因此,建议在好氧颗粒污泥工艺的运行过程中设置厌氧搅拌阶段以加快颗粒化过程及保持颗粒的长期稳定,并应避免氨氮的冲击负荷。
Pilot study was conducted to treat municipa! sewage with wide quality fluctuation and containing large amount of industrial wastewater by aerobic granular sludge technology. It is found that aerobic granules can be cultivated by this kind of wastewater, and the particulate COD that counts for 60% total COD is the main reason for the irregular and loose structure of granules and the low granulation process. The average removal rates of COD, NH4 - N and TP are （75.80 ± 16.09）% , （52.85 ±33.65 ） % and （66.57 ±22.36 ） % respectively, When the influent COD is very low, the removal effi- ciency is seriously affected. The fluctuation of influent ammonia nitrogen concentration slightly affects the settleability and diameter of granular sludge, and significantly affects the density of granular sludge. The ammonia nitrogen shock load is the main reason for the disintegration of granular sludge. It is suggested that anaerobic mixing is needed for the operation of aerobic granular sludge system in order to increasegranulation speed and keep the stability of granules in a long term, and ammonia nitrogen shock load should be avoided.
出处
《中国给水排水》
CAS
CSCD
北大核心
2011年第15期4-8,共5页
China Water & Wastewater
基金
国家自然科学基金资助项目(51078303)
长江学者和创新团队发展计划项目(IRT0853)
陕西高校省级重点实验室科研计划项目(09JS027)
关键词
好氧颗粒污泥
颗粒态有机物
氨氮浓度
冲击负荷
aerobic granular sludge
particulate organic matter
ammonia nitrogen concentration
shock load
