关于在低C/N比率的废水中同时进行化-脱的短途研究,以去除废水中的
Haiyan Guo1, Dianyong Guan1, Weixuan Bi1
1School of Transportation Engineering, Dalian Jiaotong University, Dalian, People's Republic of China.
Environmental technology
|March 8, 2026
概括
这项研究引入了一种新的同时快速化-脱 (SSND) 系统,用于处理低碳-废水. 该系统使用专门的有氧测序批量反应器有效消除和化学氧气需求,优化微生物群落以提高效率.
科学领域:
- 环境工程 环境工程
- 微生物学 微生物学
- 废水处理 废水处理
背景情况:
- 污水处理面临的挑战是低碳- (C/N) 比率,阻碍了有效的脱.
- 同时化和脱 (SND) 过程提供了潜在的解决方案,但需要优化,以应对具有挑战性的废水流.
研究的目的:
- 建立和评估一个单阶段有氧测序批量反应堆 (SBR),用于同时快捷化-脱 (SSND).
- 研究微生物群落动态和驱动SSND在低C/N比率废水中的机制.
- 在优化条件下评估化学氧需求 (COD) 和总 (TN) 的去除效率.
主要方法:
- 实施单阶段有氧SBR,控制低溶氧 (DO) 水平 (0.3-0.5 mg/L).
- 逐渐增加入射负载以促进捷径化和酸盐积累 (>95%).
- 微生物社区分析使用16S rRNA测序来识别关键的功能细菌 (例如,Nitrosomonas,Nitrospira,Thauera).
主要成果:
- 在18天内快速启动快捷化,达到95%以上的化积.
- 在单阶段有氧 (O) 模式下,COD (84.2%) 和TN (68.9%) 的清除率优于C/N比率为2.0的A/O模式.
- 氧化细菌 (Nitrosomonas) 的丰富和氧化细菌 (Nitrospira) 的抑制,其中Thauera属占主导地位.
结论:
- 通过优化微生物群落,SSND系统有效地处理低C/N的废水,并利用细胞内聚β-基酸盐 (PHB) 进行内源性脱.
- 该研究为应用SSND工艺在有限碳来源的实际废水处理场景中提供了理论基础.
- 了解微生物的行为,如自解和碳限制下的细胞外聚合物分泌,对于过程稳定性和废水质量至关重要.
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