摘要本文主要研究了Zn(II)对厌氧性氨氧化(anammox) 短期和长期的性能及污泥特性的影响进行了评价。在短期试验中,厌氧氨氧化的活性随Zn(II)浓度和预曝光时间下降。Zn(II)的半最大抑制浓度(IC50)被发现是25.0 mg L−1。24和48小时的预曝光时间是限制厌氧氨氧化活性的影响因素,并用缓冲液洗涤仅在0和24小时预曝光时间下工作的抑制污泥。厌氧氨氧化污泥可以忍受的Zn(II)浓度为5 mg L−1,但在8 mg L−1时则被压制。其抑制性能可以恢复,应用组合恢复策略,并在短期恢复实验后,受抑制的污泥特性能恢复到正常水平。47769
In the present study, the short- and long-term effects of Zn(II) on the anaerobic ammonium oxidation (anammox) performance and sludge characteristics were evaluated. The anammox activity decreased with increasing Zn(II) concentration and pre-exposure time in short-term tests. The half maximal inhibitory concentration (IC50) of Zn(II) was found to be 25.0 mg L−1. The 24 and 48-h pre-exposure time was a restricted factor impacting the anammox activity, and washing the inhibited sludge with buffer solution only worked under 0 and 24-h pre-exposure time. The anammox sludge could tolerate 5 mg L−1 Zn(II) but was suppressed at 8 mg L−1. The inhibited performance could be remitted, as the combination strategies were applied, and after the short term of recovery period, the inhibited sludge characteristics were remitted to the normal.
毕业论文关键词:厌氧氨氧化;锌(II);抑制 ;污泥; 特性; 恢复
Keywords:Anammox; Zn(II) ;Inhibition ;Sludge characteristics;Recovery
目 录
1.介绍 5
2. 方法 6
2.1. 模拟废水和接种污泥 6
2.2. 实验装置和操作策略 6
2.3. 批次实验 7
2.4. 锌对厌氧氨氧化活性的短期影响 7
2.5. 厌氧氨氧化菌团的动力学特性 7
2.6. 蓄积毒性试验 7
2.7. 预曝光时间的影响 8
2.8. 分析方法 8
2.9. 数学模型 8
2.9.1. 非竞争性抑制模型 8
2.9.2. 玻尔兹曼的增长模型 9
2.9.3. 动力学模型 9
3. 结果 9
3.1. Zn(II)对厌氧氨氧化和模型评价的短期效应 9
3.2. 动力学特性 12
3.3. 预曝光期间对厌氧氨氧化活性的抑制影响 12
3.3.1. 短周期预曝光 12
3.3.2. 长期接触 14
3.4. Zn(II)对厌氧氨氧化过程的性能的长期效应 15
3.4.1. 无明显阶段 15
3.4.2. 抑制阶段 18
3.4.3. 恢复期 18
3.5. 污泥特性 19
4. 结论 21
4.1. 生物量的增长率和脱氮能力的时间明显倍增 21
4.2. pH值和FA与二价Zn水平 22
4.3. 生物强化和NLR组合控制 锌对厌氧氨氧化菌的影响研究:http://www.youerw.com/shengwu/lunwen_49976.html