一种基于硫/CaO2的缓释氧复合物,用于持续的现场氨降解形式的农田排水
Duoduo Mei1, Jiaxiang Gong1, Shuang Tong2
1School of Water Resources and Environment, MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, China University of Geosciences (Beijing), Beijing, 100083, China.
Environmental research
|February 15, 2025
概括
一种基于硫的新型缓释氧物质 (SOSM) 有效地支持现场化以去除氨. 这种材料确保了稳定的溶解氧和pH平衡,这对于农业排水整治至关重要.
科学领域:
- 环境科学 环境科学
- 环境工程 环境工程
- 微生物学 微生物学
背景情况:
- 现场化需要稳定的氧气,但常规材料具有诸如高性和快速释放氧气等局限性.
- 清除氨 (NH4+-N) 对于农业排水整治至关重要.
研究的目的:
- 设计和评估一种新的基于硫的缓释氧材料 (SOSM),用于现场化.
- 为了应对氧气供应和pH平衡在化过程中的挑战.
主要方法:
- 开发了一种新的SOSM,使用CaO2释放氧气和S0保持pH平衡.
- 进行了为期88天的连续流体实验,使用SOSM作为NH4+-N.微生物降解的载体.
- 监测了溶解氧 (DO) 水平,NH4+-N去除效率和微生物群体动态.
主要成果:
- 在Fickian扩散后,SOSM在15天内保持DO高于8mg/L,氧气释放.
- 通过硫细菌的S0氧化产生了CaSO4沉物,并抵消了CaO2的性.
- 在稳定阶段 (22-76天) 中,NH4+-N去除效率达到93.4%.
- 微生物分析显示,蛋白质细菌和Actinobacteriota的NH4+-N去除和Acidobacteriota硫循环的丰富.
结论:
- 开发的SOSM有效地提供稳定的氧气供应,并保持pH平衡,用于现场化.
- 该系统展示了高效的NH4+-N去除,其中化占主导地位,并补充了CANON工艺.
- 索斯姆为农业排水整治提供了一个有前途的解决方案,并扩大了化技术的应用.
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