| 短程硝化反硝化除磷颗粒污泥的同步驯化 |
| 摘要点击 3195 全文点击 1047 投稿时间：2020-10-29 修订日期：2020-11-21 |
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| 中文关键词 间歇曝气 同步驯化 短程硝化反硝化除磷 颗粒污泥 曝气强度 曝气时长 |
| 英文关键词 intermittent aeration simultaneous domestication short-cut nitrification denitrifying phosphorus removal granules sludge aeration intensity aeration time |
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| 中文摘要 |
| 本实验对3组同规格SBR反应器分别采用分阶段法（A/O-A/O/A）异步驯化、连续曝气A/OA同步驯化和间歇曝气A/O/A同步驯化的方式运行.以人工配水为进水基质，接种絮状污泥，通过水力选择压颗粒化，探讨了不同运行方式下短程硝化反硝化颗粒污泥的驯化及脱氮除磷特性.结果表明，在较短曝气时长（140 min）联合较低曝气强度［3.5 L·（h·L）-1］下，间歇曝气A/O/A同步驯化最具优势，后期稳定运行期间碳、氮、磷的平均去除率分别为90.74%、91.15%和95.66%，可实现同步去除.粒径为895μm，颗粒虽小但均匀致密，f值（MLVSS/MLSS）平稳保持在0.8~0.85，有较高的生物量，这是由于间歇曝气下好/缺氧的交替运行，使得缺氧异养菌作为颗粒的核心，有利于颗粒污泥结构的稳定.批次实验结果表明，间歇曝气A/O/A同步驯化下比氨氧化速率为3.38 mg·（g·h）-1，能利用NO2-为电子受体的反硝化聚磷菌（DPAOs）占比达65.46%，更有利于氨氧化菌（AOB）和NO2-型DPAOs的同步驯化及富集，保证稳定的处理效果. |
| 英文摘要 |
| In this experiment, three replicated SBR reactors were operated using asynchronous acclimation of the phased method (A/O-A/O/A), simultaneous domestication of continuous aeration by A/O/A, and simultaneous domestication of intermittent aeration by A/O/A. Using artificial water distribution as the influent substrate, flocculent sludge was inoculated and granulated by hydraulic selection. The domestication and nitrogen and phosphorus removal characteristics of shortcut nitrification denitrifying phosphorus removal granules under different operation modes were assessed. The results show that simultaneous domestication of intermittent aeration by A/O/A has the most efficient under the combination of short aeration time (140 min) and low aeration strength[3.5 L·(h·L)-1]. The average removal rates of carbon, nitrogen, and phosphorus were 90.74%, 91.15%, and 95.66%, respectively, which could achieve synchronous removal during later stable operation. The particle size was 895 μm, and the particles were small but uniformly dense in microscope observations. The f value (MLVSS/MLSS) was kept stable at 0.8-0.85 and sludge had a high biomass due to the alternate aerobic/anoxic operation with intermittent aeration. This supported anoxic heterotrophic bacteria at the core of the particles, which was conducive to the stability of the granular sludge structure. Batch experiments showed that the specific ammonia-oxidation rate of the simultaneous domestication of intermittent aeration by A/O/A system was 3.38 mg·(g·h)-1, and denitrifying phosphate accumulating organisms (DPAOs) able to utilize nitrite as electron acceptor accounted for 65.46%. This was more conducive to the simultaneous domestication and enrichment of ammonia-oxidizing bacteria (AOB) and NO2--type DPAOs, ensuring a stable treatment effect. |
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