| 基于不同废污泥源的短程反硝化快速启动及稳定性 |
| 摘要点击 1312 全文点击 549 投稿时间：2020-01-31 修订日期：2020-02-16 |
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| 中文关键词 短程反硝化(PD) 厌氧氨氧化(ANAMMOX) 废污泥源 快速启动 稳定性 功能菌属 |
| 英文关键词 partial denitrification(PD) anaerobic ammonium oxidation(ANAMMOX) waste sludge sources rapid start-up stability functional bacteria genera |
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| 中文摘要 |
| 为探究不同废污泥源快速启动短程反硝化和实现稳定NO2--N积累的可行性，在3个完全相同的SBR反应器（S1、S2和S3）分别接种：实验室城市污水反硝化除磷系统排泥、城市污水厂剩余污泥及河涌底泥，比较其短程反硝化启动快慢和NO2--N积累特性，考察系统短程反硝化活性和NO3--N→NO2--N转化性能，并从微生物学角度分析反应器功能菌群特征.结果表明，在乙酸钠为唯一碳源、高碱度和适宜COD/NO3--N比进水条件下，3个SBR短程反硝化反应器在短时间内均能够成功启动，系统平均NO3--N→NO2--N转化率为S1 > S2 > S3（75.92% > 73.36% > 69.90%）.同时发现持续低温条件下S1和S2呈现不同程度的短程反硝化性能恶化趋势，但S3能够稳定维持良好NO2--N积累性能.微生物高通量测序表明，变形菌门和拟杆菌门居PD系统主导地位，3个短程反硝化反应器NO2--N积累关键功能菌属Thauera属丰度差异明显：S3 > S1 > S2（25.09% > 4.71% > 3.60%），表明S3具备稳定高效的NO2--N积累性能，同时高丰度Thauera属可能是维持低温短程反硝化活性的重要原因. |
| 英文摘要 |
| To explore the feasibility of the rapid start-up of partial denitrification and the stable accumulation of NO2--N in different waste sludge sources, three identical SBR reactors (S1, S2, and S3) were inoculated respectively with sludge discharged from a laboratory municipal wastewater denitrifying phosphorus removal system, surplus sludge from a municipal wastewater treatment plant, and river sediment sludge. The characteristics of the partial denitrification start-up and NO2--N accumulation were compared, and the partial denitrification activity of the system or NO3--N→NO2--N transformation performance were investigated by analyzing the characteristics of the functional bacteria genera of the reactor from the perspective of microbiology. The results showed that all three SBR partial denitrification reactors could be launched successfully in a short time with sodium acetate as the sole carbon source, under a high alkalinity, and by using a suitable COD/NO3--N ratio. The average NO3--N→NO2--N transformation ratio of the system was ranked as:S1 > S2 > S3 (75.92% > 73.36% > 69.90%). It was found that S1 and S2 had different degrees of partial denitrification performance deterioration under a continuous low temperature, but that S3 could maintain a good NO2--N accumulation performance. High throughput sequencing showed that Proteobacteria and Bacteroidetes were dominant in the partial denitrification system, and that the abundance of Thauera was significantly different in the three PD reactors:S3 > S1 > S2 (25.09% > 4.71% > 3.60%), thus indicating that S3 had stable and efficient NO2--N accumulation performance and that a high abundance of Thauera might play a significant role in maintaining low temperature partial denitrification activity. |
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