| 全程自养脱氮颗粒污泥培养及动力学研究 |
| 摘要点击 2325 全文点击 2188 投稿时间：2008-10-15 修订日期：2008-12-22 |
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| 中文关键词 全程自养脱氮 颗粒污泥 厌氧氨氧化 动力学模型 |
| 英文关键词 deammonification granular sludge ANAMMOX kinetic model |
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| 中文摘要 |
| SBR反应器接种厌氧颗粒污泥,经过3个阶段培养,成功培养出全程自养脱氮颗粒污泥,并对颗粒污泥系统进行动力学研究.建立了描述全程自养脱氮的动力学模型.由于溶解氧(DO)在颗粒污泥内呈梯度分布,模型引入DO校正系数.通过模型研究反硝化作用、亚硝酸盐和DO对过程的影响,模拟结果与实测结果相一致.结果说明，异养反硝化菌的存在,在一定程度上影响厌氧氨氧化(ANAMMOX)过程,但是随着启动的进行,反硝化的影响逐渐降低.初始亚硝酸盐浓度为20～30 mg/L时,厌氧氨氧化开始受到抑制,总氮去除率开始降低.DO浓度的过高或过低都会导致全程自养脱氮效果受限制.根据进水氨氮浓度调整DO浓度,可使总氮去除效率达到较佳水平.进水氨氮浓度为80 mg/L时,最佳DO为0.3～0.6 mg/L. |
| 英文摘要 |
| Deammonification process was started-up in a sequencing batch reactor (SBR) seeded with anaerobic granular sludge. A kinetic model describing deammonification process was proposed. Due to the presence of concentration gradient of dissolved oxygen (DO) in granular sludge, model correction factors of DO were introduced. The influences of denitrification process, nitrite and DO on granular sludge activity were studied by model and good agreement was obtained between the experimental results and simulation results. Heterotrophic denitrifiers has some influence on the ANAMMOX process during the initial cultivation, and the influence decreases gradually during the following operation period. When nitrite concentration is 20-30 mg/L, a total nitrogen removal efficiency begins to drop caused by inhibition of nitrite. With high or low DO concentration, the activity of deammonification is inhibited. A total nitrogen removal efficiency can simultaneously reach higher levels by controlling appropriate DO related NH+4-N concentration of inflow. In a NH+4-N concentration of 80 mg/L, the optimal DO level for a maximal nitrogen gas production is at 0.3-0.6 mg/L. |
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