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首页> 外文期刊>Bioprocess and Biosystems Engineering >Optimization of free ammonia concentration for nitrite accumulation in shortcut biological nitrogen removal process
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Optimization of free ammonia concentration for nitrite accumulation in shortcut biological nitrogen removal process

机译：短程生物脱氮过程中亚硝酸盐累积的游离氨浓度的优化

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摘要

A shortcut biological nitrogen removal (SBNR) utilizes the concept of a direct conversion of ammonium to nitrite and then to nitrogen gas. A successful SBNR requires accumulation of nitrite in the system and inhibition of the activity of nitrite oxidizers. A high concentration of free ammonia (FA) inhibits nitrite oxidizers, but unfortunately decreases the ammonium removal rate as well. Therefore, the optimal range of FA concentration is necessary not only to stabilize nitrite accumulation but also to achieve maximum ammonium removal. In order to derive such optimal FA concentrations, the specific substrate utilization rates of ammonium and nitrite oxidizers were measured. The optimal FA concentration range appeared to be 5-10 mg/L for the adapted sludge. The simulated results from the modified inhibition model expressed by FA and ammoniumitrite concentrations were shown very similar to the experimental results.
机译：捷径生物脱氮（SBNR）利用将铵直接转化为亚硝酸盐然后再转化为氮气的概念。成功的SBNR需要亚硝酸盐在系统中的积累并抑制亚硝酸盐氧化剂的活性。高浓度的游离氨（FA）会抑制亚硝酸盐氧化剂，但不幸的是也会降低铵的去除率。因此，FA浓度的最佳范围不仅对于稳定亚硝酸盐积累，而且对于实现最大的铵去除率都是必要的。为了得出这样的最佳FA浓度，测量了铵和亚硝酸盐氧化剂的特定底物利用率。适应的污泥的最佳FA浓度范围似乎为5-10 mg / L。用FA和铵/亚硝酸盐浓度表示的改进抑制模型的模拟结果与实验结果非常相似。

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