摘要
利用城市污水,在序批式反应器(SBR)中历时11 d成功培养出同步脱氮除磷的好氧颗粒污泥;当污泥浓度达到3 g/L时,采用旋流器分选颗粒,有利于颗粒污泥的培养和稳定维持。稳定运行阶段,污泥浓度为3.108 g/L,污泥容积指数(SVI_(30))为60 mL/g。成熟的颗粒污泥呈棕黄色,形状规则。颗粒污泥在旋流器分选前后粒径分布有显著变化,粒径>200μm的颗粒污泥占比由35%增加到52%。颗粒污泥经旋流器三级分选的效果较好,质量分离效率为83.02%,扣除分流比对分离效率的影响,纯分离效率为75.75%。稳定运行阶段,系统同步脱氮除磷效果显著,出水COD、NH_(4)^(+)-N、NO_(3)^(-)-N、TN、TP浓度分别在30、0.5、15、16、0.7 mg/L以下。
Aerobic granular sludge with simultaneous nitrogen and phosphorus removal ability was successfully cultivated for treating municipal wastewater in a sequencing batch reactor(SBR)in 11 days.When the sludge concentration reached 3 g/L,a cyclone was used to separate the granules,which was conducive to the cultivation and stable maintenance of granular sludge.In the stable operation stage,the sludge concentration was 3.108 g/L,and the sludge volume index in 30 min(SVI_(30))was 60 mL/g.The mature granular sludge was brownish yellow with a regular shape.The granular size distribution changed significantly before and after separation,and the proportion of granular sludge with particle size greater than 200μm increased from 35% to 52%.The mass separation efficiency of granular sludge was 83.02% after three-stage separation,and the pure separation efficiency was 75.75% after subtracting the separation ratio.In the stable operation stage,the system showed a remarkable performance of simultaneous nitrogen and phosphorus removal,and the COD,NH_(4)^(+)-N,NO_(3)^(-)-N,TN and TP in effluent were below 30 mg/L,0.5 mg/L,15 mg/L,16 mg/L and 0.7 mg/L,respectively.
作者
张帅
ZHANG Shuai(Goldwind Environmental Protection Co.Ltd.,Beijing 100176,China)
出处
《中国给水排水》
CAS
CSCD
北大核心
2023年第9期72-77,共6页
China Water & Wastewater
关键词
好氧颗粒污泥
水力旋流器
序批式反应器(SBR)
同步脱氮除磷
aerobic granular sludge
hydrocyclone
sequencing batch reactor(SBR)
simultaneous nitrogen and phosphorus removal
