ZHANGShuai.Sequencing Batch Reactor Coupled Hydrocyclone for Cultivation of Aerobic Granular Sludge[J].China Water & Wastewater,2023,39(9):72-77.
SBR耦合水力旋流器培养好氧颗粒污泥的研究
- Title:
- Sequencing Batch Reactor Coupled Hydrocyclone for Cultivation of Aerobic Granular Sludge
- 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
- Keywords:
- aerobic granular sludge; hydrocyclone; sequencing batch reactor (SBR); simultaneous nitrogen and phosphorus removal
- 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（SVI30）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>200 μm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、NH4+-N、NO3--N、TN、TP浓度分别在30、0.5、15、16、0.7 mg/L以下。
- Abstract:
- 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 (SVI30) 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 200 μm 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, NH4+-N, NO3--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.
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