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不同的氧化排放和微生物群在由形式诱导的建筑湿地中的继承

Jun-Feng Wang¹, Jia-Wei Huang¹, Ze-Xiang Cai¹

¹Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou 510632, China.

Environment international

|December 9, 2023

概括

建筑湿地的氧化物 (N₂O) 排放因源而异. 酸盐养系统显示碳含量较高的N₂O增加,而养系统通过植物吸收减少了N₂O.

科学领域:

环境科学环境科学
微生物学微生物学
环境工程环境工程

背景情况:

氧化 (N₂O) 是污水处理过程中排放的一种强有力的温室气体.
基于影响性形式的建筑湿地 (CWs) 中N2O排放的理解对于环境管理至关重要.
碳比 (COD/N) 对CW中的N2O生产的影响需要进一步调查.

研究的目的:

研究不同形式 (和) 和不同碳源供应 (COD/N比率) 对CW中的N₂O排放配置文件的影响.
为了阐明微生物机制和细菌社区的继承驱动N₂O生产在不同的影响条件下.
评估植物-相互作用在减轻N₂O排放中的作用.

主要方法:

实验设置使用控制气 (NH₄⁺-N或NO₃^--N) 和碳 (COD/N比为3,6,9) 的CW.
监测N₂O排放流和总去除效率.
使用数据库推断分析微生物群落结构和关键转化基因 (例如,nirK,norB,norC,nosZ) 的丰度.
评估植物吸收的和根液的生产.

主要成果:

接受酸盐的CW显示总去除量增加,但N₂O排放量更高 (66.51486.77 ug-N/(m²·h)) 与高的COD/N比率,与丰富的脱细菌和基因有关.
用氨养的燃烧显示出波动性的N₂O排放 (122.87, 44.00, 148.59 ug-N/(m²·h)) 与不同的COD/N比率.
增强了植物的吸收和根排泄物,调节了的转化,最终减少了N2O排放.

结论:

的形式和COD/N比率显著改变微生物社区的继承和CW中的转化途径.
基于酸盐的CW容易产生更高的N₂O排放,随着碳可用性的增加.
由植物微生物相互作用增强的基CW显示出降低N2O排放的潜力.

关键词:

在COD/N比率上.建造的湿地建造的湿地代谢学和代谢基因组学的形式是.氧化氧化的使用方法

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