单独复合SCN-负荷冲击水力负荷冲击对厌氧氨氧化工艺影响

摘要主要研究单独和复合的硫氰酸盐（SCN-）和水力冲击对厌氧氨氧化过程的影响。评估了瞬时的SCN-（300,600和900mg L-1），水力冲击（流速增加2倍）以及复合的SCN-和水力冲击对反应器除氮性能和稳定性的影响。灵敏度指数（SI）用于表征SCN-对反应器的影响，SI随着冲击强度的增加，而增加。在900mg L-1SCN-冲击3小时后，实现较高的SI，较低的SCN-浓度（300mg L-1）下暴露于SCN-冲击1。5和3小时后，反应器性能是稳定的。水力冲击效应主要与SCN-浓度有关而不和冲击时间有关。在SCN-和水力复合冲击的试验中也发现了类似的现象。水力冲击试验中的反应器性能稳定，观察到相对低的SAA损失率（9。2%和4。0%）。冲击阶段的特定厌氧氨氧化活性（SAA）和heme c受到不利影响，最大损失率分别为42。6％和22。7％。然而，在冲击阶段，细胞外聚合物（EPS）的含量发生不同程度上增加，用于抵抗外界不利的环境条件。这些不同冲击试验的结果表明厌氧氨氧化过程中的不稳定性取决于冲击时间和冲击强度。88587

Abstract The robustness of an anaerobic ammonium oxidation (anammox) process under inpidual and combined thiocyanate (SCN-) and hydraulic shocks was investigated。 The nitrogen removal performance and stability of a process subjected to transient SCN- (300, 600 and 900 mg L-1), hydraulic shock (2-fold increase in flow rate) and the combined effects of SCN- and hydraulic shock were evaluated。 The sensitivity index (SI) was used to characterize the impact of the SCN-, and the SI exhibited a rising trend with increases in shock strength。 The higher SI of effluent was reached after exposure to SCN-shocks (900 mg L-1) for 3 h, and the reactor performance was stable at a relatively lower SCN- concentration (300 mg L-1) after exposure to SCN- shocks for 1。5 and 3 h。 The shock effect was mainly related to the SCN- concentration rather than the shock time。 The similar phenomenon also was found in the test of combined SCN- and hydraulic shocks。 The reactor performance in hydraulic shock tests was robust, and the relative low SAA loss ratios (9。2% and 4。0%) were observed。 The specific anammox activity and heme c in the shock period were adversely affected, with maximum loss rates of 42。6% and 22。7%, respectively。 However, the extracellular polymeric substance content during the shock period increased in varying degrees and antagonized exogenous disturbances。 The results for these different shocks suggested that instabilities in the anammox process were dependent on both time and the concentration intensity。源Q于D优G尔X论V文Y网wwW.yOueRw.com 原文+QQ75201`8766

毕业论文关键词：厌氧氨氧化；焦炉废水；硫氰酸盐冲击；水力冲击

Keywords: Anammox; Coke-oven wastewater; Thiocyanate shock; Hydraulic shock

1、引言 5

2、材料和方法 5

2。1、模拟废水和接种 5

2。2、实验装置和运行条件 6

2。3、SAA测定 6

2。4、分析程序 6

2。5、计算 7

2。5。1、FA和FNA 7

2。5。2、敏感性指数（SI） 7

2。5。3、计算SAA损失率（SLR）和SAA恢复率（SRR） 7

3、结果与讨论 9

3。1、不同的冲击条件下From优T尔K论M文L网wWw.YouERw.com 加QQ75201^8766 厌氧氨氧化菌性能 9

3。1。1、SCN-冲击试验单独复合SCN-负荷冲击水力负荷冲击对厌氧氨氧化工艺影响:http://www.youerw.com/huaxue/lunwen_164330.html