Enhanced pollutants removal from saline wastewater was investigated in simultaneous anammox and denitrification (SAD) process with glycine betaine (GB) addition. Long-term operation indicated the optimal GB dose was around 0.4 mM, which enhanced both anammox and denitrifying activity by 30% and 45%, respectively. The total nitrogen and organic removal rates were 0.38 ± 0.2 kgN/m³/d and 0.34 ± 0.3 kgCOD/m³/d, respectively, which increased by 34.5% and 20.5%. Independent of GB dose, denitrifying activity was promoted, but anammox activity was drastically deteriorated after excessive GB addition. The optimal GB dose predicated by both Gaussian and Modified-Boltzmann models were 0.42–0.45 mM. Besides, the bacterial activity recovery after excessive GB addition could be analyzed by the Modified-Boltzmann model. With 1.5 mM GB, granular floatation occurred since numerous gas bubbles were inside the granules. In general, exogenous GB addition can mitigate salinity inhibition and promote pollutants removal from saline wastewater.

在添加甘氨酸甜菜碱（GB）的同时厌氧和反硝化（SAD）过程中，研究了从盐水中去除污染物的增强方法。长期操作表明最佳GB剂量约为0.4 mM，这分别使厌氧氨氧化和反硝化活性分别提高了30％和45％。总氮和有机物去除率为0.38±0.2 kgN / m ³ / d和0.34±0.3 kgCOD / m ³/ d，分别增加了34.5％和20.5％。独立于GB剂量，反硝化活性得到促进，但是过量添加GB后，厌氧氨氧化活性急剧下降。高斯模型和Modified-Boltzmann模型预测的最佳GB剂量为0.42-0.45 mM。此外，可以通过Modified-Boltzmann模型分析过量添加GB后的细菌活性恢复。在1.5 mM GB的情况下，由于在颗粒内部有大量气泡，因此发生了颗粒漂浮。通常，外源GB的添加可以减轻盐分抑制作用，并促进从盐水中去除污染物。