Operation stability and recovery performance in an Anammox EGSB reactor after pH shock
Operation stability and recovery performance in an Anammox EGSB reactor after pH shock
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DOI：
10.1016/j.ecoleng.2016.01.084
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发表时间：
2016-05-01
影响因子：
3.8
通讯作者：
Li, Yu-You
中科院分区：
文献类型：
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作者：
He, Shilong;Zhang, Yanlong;Li, Yu-You
对厌氧氨氧化（Anammox）膨胀颗粒污泥床（EGSB）反应器进行了长期连续运行的研究。评价了瞬时pH冲击(从9.0降至7.0并维持24 h)过程的脱氮性能和稳定性。在稳定阶段，氮负荷率（NLR）和脱氮率（NRR）分别可达10和8.5 kg-N m(-3) d(-1)。然而，该系统对瞬时 pH 冲击的耐受性较低。颗粒污泥性质的恶化和厌氧氨氧化比活性（SAA）的抑制导致 EGSB 在 pH 冲击后不稳定。控制EGSB处理性能的主要因素是高浓度的游离亚硝酸（FNA）和游离氨（FA）。然而，当FA和FNA分别低于15mgl(-1)和15μg1(-t)时，氨去除率仍能保持低于10%的降低。通过控制低 pH 冲击后的 FNA 和 FA 浓度，该过程成功恢复。 (C) 2016 Elsevier B.V. 保留所有权利。
An Anaerobic ammonia oxidation (Anammox) expanded granular sludge bed (EGSB) reactor was investigated with a long-term continuous operation. The nitrogen removal performance and stability of process subjected to transient pH shock (decreased from 9.0 to 7.0 and maintaining for 24 h) were evaluated. In the steady stage, the nitrogen loading rate (NLR) and nitrogen removal rate (NRR) can reach to 10 and 8.5 kg-N m(-3) d(-1), respectively. However, the system had a low tolerance for transient pH shock. The deterioration of the granule sludge properties and the inhibition of specific Anammox activity (SAA) resulted in the destabilization of the EGSB after pH shock. The main factors governing the treatment performance of EGSB were the high concentration of free nitrous acid (FNA) and free ammonia (FA). However, the lower than 10% reduction of ammonia removal can be maintained when FA and FNA were lower than 15 mgl(-1) and 15 mu g1(-t), respectively. The process was successfully recovered by controlling the FNA and FA concentration after the low pH shock. (C) 2016 Elsevier B.V. All rights reserved.