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增强建筑湿地的除:在集成的垂直流系统中流入基板度的作用

Tongtong Liu¹, Da Li¹, Yan Tian²

¹State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, No. 73 Huanghe Road, Nangang District, Harbin 150090, China.

Environmental science and ecotechnology

|May 15, 2024

概括

提高碳比率大大提高了建筑湿地中的去除,特别是对于富含酸盐的废水. 优化碳来源和微生物通路是有效管理的关键.

科学领域:

环境工程环境工程
水处理技术水处理技术
微生物生态学微生物生态学

背景情况:

建筑湿地 (CWs) 对于 (N) 清除至关重要,但效率因影响基质度而异.
优化N去除策略受到影响变异性影响CW效率和机制的挑战.

研究的目的:

在集成垂直流构造湿地 (IVFCWs) 中研究流入基质度 (C/N比) 和N去除过程之间的相互作用.
评估不同酸盐 (NO3--N) 和 (NH4+-N) 度对去除效率和微生物通路的影响.

主要方法:

使用集成的垂直流构造湿地 (IVFCWs),其废水富含NO3--N和NH4+-N.
改变碳与 (C/N) 的比例 (1,3,6) 以评估对总 (TN) 去除的影响.
采用微生物群体分析,代谢途径评估和质量平衡计算.

主要成果:

在NO3-N系统中,TN去除效率从13.46%增加到87.00%,C/N比率从1到6.
由于溶解氧和性限制,NH4+-N系统在TN去除方面显示出有限的改善 (33.69%).
无氧脱,N同化和DNRA在高C/N NO3--N系统中占主导地位;有氧脱和N同化在NH4+-N和低C/N NO3--N系统中占主导地位.

结论:

较高的C/N比率显著提高了NO3--N占主导地位的IVFCW中的TN去除.
对于NO3-N系统的策略应该解决碳限制和脱/DNRA竞争.
NH4+-N系统需要优化碳使用,溶解氧和性,以改善N去除.

关键词:

建造的湿地建造的湿地脱化过程中的脱.增强战略加强战略微生物的同化清除的途径清除的途径

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