| 除磷亚硝化颗粒工艺启动及性能恢复 |
| 摘要点击 1534 全文点击 491 投稿时间：2018-09-07 修订日期：2018-09-19 |
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| 中文关键词 序批式反应器(SBR) 除磷亚硝化颗粒污泥 污泥龄 溶解氧 亚硝化积累率 去除率 |
| 英文关键词 sequencing batch reactor (SBR) phosphorus removal and nitrification granular sludge sludge age dissolved oxygen nitrification rate removal efficiency |
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| 中文摘要 |
| 针对生活污水低碳氮比的水质特点，采用SBR反应器接种低温储存的强化生物除磷颗粒污泥，来启动除磷亚硝化颗粒工艺，通过控制曝气强度及污泥龄实现除磷亚硝化的稳定运行，为后置CANON或厌氧氨氧化工艺（ANAMMOX）提供进水.污泥龄为30 d的条件下实现了出水TP小于0.5 mg·L-1，COD浓度小于50 mg·L-1，亚硝酸盐氮积累率达到了90%以上.实验还得出，过高的曝气强度使除磷亚硝化性能恶化，可采用降低曝气强度和减小污泥龄的方式来改善除磷性能.污泥龄为40 d可以实现生活污水除磷亚硝化中的亚硝化性能进一步恢复，最终实现出水磷浓度保持在0.5 mg·L-1以下，COD及TP去除率分别稳定在80%及95%，亚硝酸盐积累率保持在90%以上，SVI值从初始的63 mL·g-1降低到35 mL·g-1，颗粒污泥沉降性能良好，颗粒粒径在整个运行过程中保持在1000 μm以上. |
| 英文摘要 |
| In this experiment, to determine the characteristics of low carbon and nitrogen water quality in domestic sewage, a sequencing batch reactor (SBR) was used to realize the stable operation of dephosphorization-nitrosation, by inoculating the enhanced biological phosphorus removal granular sludge, which was stored at low temperature. The sludge was activated by control of the aeration intensity and sludge age, which provided water for the influent of a CANON or anaerobic ammonia oxidation (ANAMMOX) process. In the experiment, when the concentration of dissolved oxygen was 6.5 mg·L-1 and the sludge age was 30 days, the effluent TP was less than 0.5 mg·L-1, the concentration of COD was less than 50 mg·L-1, and the accumulation rate of nitrite nitrogen was above 90%. It was also found that the performance of phosphorus removal can be improved by reducing the aeration intensity and reducing the age of sludge when the performance was damaged by excessive aeration strength. Aging the sludge for 40 days could restore nitrification during the process of phosphorus removal and nitrification. The final concentration of phosphorus was kept below 0.5 mg·L-1, and the removal rate of COD and TP was stable at 80% and 95%, respectively, the accumulation rate of nitrite remained above 90%, and the SVI value decreased from the initial 63 mL·g-1 to 35 mL·g-1. The settling performance of the granular sludge was good, and the particle size was kept above 1000 μm. |
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