| 进水氨氮浓度对生物除磷颗粒系统的影响 |
| 摘要点击 2110 全文点击 541 投稿时间：2018-08-15 修订日期：2018-09-09 |
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| 中文关键词 生物除磷颗粒 氨氮浓度 颗粒粒径 胞外聚合物(EPS) PN/PS |
| 英文关键词 biological phosphorus removal granules ammonia concentration particle size extracellular polymeric substance(EPS) PN/PS |
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| 中文摘要 |
| 在SBR反应器中接种成熟的生物除磷颗粒，通过分阶段提高进水中氨氮浓度，研究了进水氨氮浓度对生物除磷颗粒系统的影响，确定系统对进水氨氮负荷的承受能力.结果表明，进水氨氮浓度低于45 mg·L-1时，生物除磷颗粒系统具有良好的性能，TP去除率在96%以上，COD去除率在89%以上，出水TP浓度和COD浓度分别在0.4 mg·L-1和25 mg·L-1以下，颗粒粒径在950 μm以上，SVI在45 mL·g-1以下；进水氨氮浓度为60 mg·L-1时，TP去除率在95%以上，出水TP浓度在0.5 mg·L-1以下，颗粒粒径为760 μm，SVI为56 mL·g-1，系统中生物除磷颗粒出现部分解体，PAOs代谢和生长开始受到抑制.进水氨氮浓度达到70 mg·L-1时，TP去除率为70%，出水TP浓度在3 mg·L-1左右，颗粒粒径为570 μm，SVI为75 mL·g-1，PN/PS值达到7.50左右，系统中生物除磷颗粒严重解体，PAOs代谢和生长被严重抑制.随着进水氨氮浓度上升，导致生物除磷颗粒中微生物分泌蛋白质增加和多糖减少，PN/PS值增大，出现生物除磷颗粒解体，颗粒粒径减小和SVI上升，生物除磷颗粒的结构和功能被破坏. |
| 英文摘要 |
| Mature biological phosphorus removal granules were inoculated into a SBR. The effect of the ammonia concentration on biological phosphorus removal granules system was investigated by increasing the concentration of ammonia in the influent. The ability of the system to withstand ammonia loading was determined. The results showed that when the influent ammonia concentration was below 45 mg·L-1, the biological phosphorus removal granule system showed good performance. The TP removal efficiency was above 96%, the COD removal efficiency was over 89%. The effluent TP concentration and COD concentration were 0.4 mg·L-1 and 25 mg·L-1 respectively. The particle size was above 950 μm and the SVI was below 45 mL·g-1. When the influent ammonia concentration was 60 mg·L-1, the removal efficiency of TP was more than 95%. The effluent TP concentration was below 0.5 mg·L-1, the particle size was 760 μm, and the SVI was 56 mL·g-1. Furthermore, the biological phosphorus removal granules partially disintegrated and the metabolism and growth of PAOs began to be inhibited in the system. When the influent ammonia concentration reached 70 mg·L-1, the removal efficiency of TP was 70%, the effluent TP concentration was about 3 mg·L-1, the particle size was 570 μm, the SVI was 75 mL·g-1, and the value of PN/PS was about 7.50. The biological phosphorus granules severely disintegrated and the metabolism and growth of PAOs was severely inhibited in the system. Moreover, as the influent ammonia concentration increased, the protein increased and polysaccharide decreased from the microbial secretion of biological phosphorus removal granules. Moreover, the value of PN/PS increased, the biological phosphorus removal granules disintegrated, the particle size decreased, the SVI increased, and the structure and function of the biological phosphorus removal granules were destroyed. |
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