摘要
为了有效控制A/O生物除磷工艺处理化粪池污水时产生的丝状菌膨胀,先后采取改变系统的COD污泥负荷(NCOD)、溶解氧(DO)的质量浓度和降低S2-的质量浓度等措施,最终使A/O除磷工艺丝状菌膨胀得到了控制,污泥沉降性能得到了有效恢复.研究结果表明:A/O除磷工艺在高NCOD条件下运行时,容易发生严重的丝状菌膨胀现象,原因是COD在厌氧区降解后仍有较高的剩余量进入好氧区,导致聚磷菌在和丝状菌的竞争中优势变弱;在低NCOD条件下运行时,由于原水中硫化物含量过高导致丝状硫细菌增殖,因此仍然存在轻度的丝状菌膨胀现象.
In order to effectively control the sludge filamentous bulking in A/O phosphorus removal process when treating wastewater of septic tank.By changing sludge loading、dissolved oxygen concentration,and reducing the concentration of S2-,sludge filamentous bulking was controlled effectively,and also the settling ability of activated sludge got recovered.The results showed that,when the sludge loading of A/O process is higher,serious sludge filamentous bulking easily happened,because the remaining COD was still v...
出处
《北京工业大学学报》
EI
CAS
CSCD
北大核心
2009年第12期1663-1669,共7页
Journal of Beijing University of Technology
基金
北京市教委课题'城市水体富营养化防治机制与实用技术研究'资助项目
关键词
除磷
A/O工艺
污泥膨胀
化学需氧量
溶解氧
丝状硫细菌
phosphorus removal
A/O process
sludge bulking
chemical oxygen demand
dissolved oxygen
filamentous sulfur bacteria
