从垃圾填埋泥的脱水液中去除气,通过部分化和脱化去除气
Zihang Ma1, Lifeng Lin2, Jiafu Xi2
1Shanghai Engineering Research Center of Energy - Saving in Heat Exchange Systems, College of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai 200090, China.
Bioresource technology
|October 11, 2023
概括
高水平的溶氧 (DO) 通过促进部分化 (PN) 和脱化,提高了废水处理中的去除. 这种方法有效地处理富含氨的垃圾填埋污水.
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:
- 垃圾填埋场污泥脱水液含有高度的氨.
- 有效的除对于处理这些废水至关重要.
- 部分化-脱化是消除的有希望的途径.
研究的目的:
- 为了评估不同溶解氧 (DO) 水平对无氧/氧膜生物反应器中去除的影响.
- 为了研究在高DO条件下去除背后的机制.
主要方法:
- 试点规模的两个无氧/氧膜生物反应器在高 (5.0-6.0 mg/L) 和常规 (2.0-3.0 mg/L) DO水平下运行.
- 对去除效率,酸盐积累和微生物群落结构的分析.
- 动力抑制试验和元基因组分析.
主要成果:
- 高和传统的DO系统都实现了部分化-脱,高的自由氨量确保了稳定的部分化.
- 高DO系统表现出优异的性能,98.5%的酸盐积累和98.0%的去除.
- 在自由氨抑制下,高DO有利于氨氧化细菌 (AOB) 而不是酸盐氧化细菌,其中Pseudomonas,Thauera和Soehngenia是特征性属.
结论:
- 较高的DO水平通过膜生物反应器中的部分化-脱化显著提高了去除效率.
- 高DO条件促进了AOB的扩散和活动,从而改善了富含氨的废水的处理.
- 这项研究为具有挑战性的工业废水流的成本有效处理提供了宝贵的见解.
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