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通过添加生物质,提高铁碳湿地的脱性能:对酸盐和氨转化的影响

Baolei Guo¹, Guoqiang Li¹, Hongbin Xu¹

¹School of Ecology and Environment, Zhengzhou University, Henan 450001, China.

The Science of the total environment

|January 7, 2024

概括

将生物质添加到铁碳湿地增强了酸盐的去除,但增加了氨. 生物质增加了脱率和氨产量,同时阻碍了氧化的减少.

科学领域:

环境工程环境工程
水处理技术水处理技术
生物地质化学生物地质化学

背景情况:

铁碳 (Fe-C) 湿地用于废水处理.
脱是从废水中去除酸盐 (NO3-N) 的关键过程.
添加生物质在Fe-C湿地脱化中的作用需要进一步研究.

研究的目的:

评估生物质添加对铁碳湿地的脱性能的影响.
为了比较铁碳湿地与没有添加生物质之间的酸盐和酸去除效率.
为了阐明微生物途径涉及到增强的脱化.

主要方法:

长期运行两种类型的铁碳湿地:CW-Fe (没有添加生物质) 和CW-BFe (添加生物质).
污水中酸盐 (NO3-N) 和 (NH4+-N) 度的监测.
基于第一阶反应动力学的脱化动力学分析.
超基因组分析以评估微生物社区结构和功能基因.

主要成果:

与CW-Fe (1.467 mg/L) 相比,CW-BFe的排放量显著降低了NO3-N (0.418 mg/L) 的排放量.
CW-BFe显示出比CW-Fe (0.889 mg/L) 更高的NH4+-N (1.465 mg/L) 废水.
生物质的添加将脱动态常数放大了2.45.4倍,并显著促进了非仿真性酸盐降解为氨 (DNRA) 途径.
生物质添加阻碍了氧化 (N2O) 的减少,使其在质量平衡中的比例从CW-Fe的0.379%增加到CW-BFe的2.715%.

结论:

生物质的添加增强了铁碳湿地的整体酸盐去除,主要是通过增加脱和DNRA.
改善酸盐去除的权衡是废水中氨度的增加.
生物质添加改变了微生物通路,导致减少N2O缓解,这需要进一步优化.

关键词:

脱化过程中的脱.含有Fe-C的填充剂.转基因组学是什么意思?

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