基于N/S的硫酸盐降解氨氧化的优化:和硫去除性能,微生物群落和响应表面方法
Chen Wei1, Jiajie Hu2, Xiaoxia Wang3
1School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou, 730070, China; Technical Center of Sewage Treatment Industry in Gansu Province, Lanzhou, 730070, China.
Environmental research
|March 7, 2026
概括
硫酸盐降解氨氧化 (Sulfammox) 有效地去除和硫. 最佳条件,包括低N/S比率,提高了废水处理中的和硫酸盐的去除效率.
科学领域:
- 环境微生物学环境微生物学
- 废水处理技术 废水处理技术
- 生物地质化学循环是什么
背景情况:
- 硫酸盐降解氨氧化 (Sulfammox) 是一种用于同时去除和硫的新型无氧过程.
- 了解Sulfammox的微生物通路和最佳条件对于其应用至关重要.
- 高和硫酸盐度在工业废水中构成挑战.
研究的目的:
- 研究N/S比对Sulfammox性能和微生物生态学的影响.
- 为了确定最佳的操作条件,以有效地去除和硫.
- 为了阐明驱动Sulfammox过程的微生物机制.
主要方法:
- 三个无氧测序批量反应堆的运行,具有不同的N/S比率 (2.5,2.0,1.5).
- 对 (NH4+-N) 和硫酸盐 (SO42--S) 的去除效率的分析.
- 用X射线光电子光谱 (XPS) 来检测元素硫.
- 批量测试和响应表面方法 (RSM) 用于优化操作参数 (pH,HRT,COD).
主要成果:
- 最低的N/S比率 (1.5) 产生了最高的去除效率:NH4+-N的91.82%和SO42--S.的47.95%.
- 确定了最佳条件:pH8.0,HRT48小时,COD50毫克/升;RSM预测N/S1.57,pH7.66,HRT46.53小时,COD48.61毫克/升为93.13%的NH4和47.35%的SO2-S去除.
- 通过XPS证实了元素硫的形成,减轻了硫化物抑制. 高的COD (>300 mg/L) 抑制了苏尔法克斯的过程.
- 微生物分析显示,在N/S 1.5时,Desulfobacterota的丰度增加,而Candidatus-Brocadia (anammox细菌) 的丰度为<0.1%.
结论:
- 低N/S比对于有效的Sulfammox性能至关重要.
- 优化的操作参数显著提高了氨和硫酸盐的去除.
- 这项研究为高NH4+-N和SO42--S废水的低碳协同处理提供了一个框架.
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