LUO Yi-han,CHEN Ying,XIE Shu-ting,et al.Effects of Temperature, DO and C/N Ratio on Nitrogen and Phosphorus Removal in SBBR Process[J].China Water & Wastewater,2021,37(9):82-89.
温度、DO及C/N值对SBBR工艺脱氮除磷的影响
- Title:
- Effects of Temperature, DO and C/N Ratio on Nitrogen and Phosphorus Removal in SBBR Process
- 关键词:
- 农村生活污水; 序批式生物膜反应器（SBBR）; 脱氮除磷; 同步硝化反硝化（SND）
- Keywords:
- rural domestic sewage; sequencing batch biofilm reactor (SBBR); nitrogen and phosphorus removal; simultaneous nitrification and denitrification (SND)
- 摘要:
- 采用以An/O/A（厌氧/好氧/缺氧）模式运行的序批式生物膜反应器（SBBR）工艺对模拟宁夏农村生活污水进行处理，考察温度、DO及C/N值对SBBR工艺脱氮除磷效果的影响。结果表明，SBBR系统可以呈现良好的同步硝化反硝化（SND）效果，系统在C/N值为6、DO为1.4~1.6 mg/L、温度分别为30 ℃和20 ℃两种工况下，对氮、磷的平均去除率分别为98.25%、81.56%和91.63%、96.03%，出水水质满足《城镇污水处理厂污染物排放标准》（GB 18918—2002）的一级B标准。该工艺在深度脱氮情况下后置缺氧段存在二次释磷现象，通过调整DO浓度，该工艺在温度为30 ℃、C/N值为6、DO为2.9~3.1 mg/L的条件下，出水水质可达到GB 18918—2002的一级A标准。
- Abstract:
- Synthetic rural domestic sewage was treated by a laboratory scale sequencing batch biofilm reactor (SBBR) which was operated in An/O/A (anaerobic/oxic/anoxic) mode in Ningxia, and the effects of temperature, DO and C/N ratio on removal performances of nitrogen and phosphorus were investigated. The SBBR system showed a good simultaneous nitrification and denitrification (SND) performance. When the system was operated at temperature of 30 ℃ and 20 ℃ with C/N ratio of 6 and DO of 1.4-1.6 mg/L, the removal efficiencies of nitrogen and phosphorus were 98.25%, 81.56% and 91.63%, 96.03%, respectively, and the effluent quality could meet the first level B limitation of Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002). In the process of deep denitrification, there was a secondary phosphorus release phenomenon in the post-anoxic section. By adjusting the concentration of DO, the effluent quality met the first level A limitation of GB 18918-2002 when temperature, C/N ratio and DO were 30 ℃, 6 and 2.9-3.1 mg/L.
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