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Xi Li¹, Yuyuan Li¹, Jinshui Wu²

¹Key Laboratory of Agro-ecological Processes in Subtropical Regions, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Hunan, 410125, China; Changsha Research Station for Agricultural & Environmental Monitoring, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Hunan, 410125, China.

|July 8, 2023

概括

在建筑湿地中出现的水生植物增加了从猪废水中去除的速度. 它们的根排泄物,包括有机和氨基酸,刺激有益的根球微生物,从而显著减少污染物.

科学领域:

环境科学环境科学
微生物学微生物学
废水处理工程废水处理工程

背景情况:

猪废水中的高含量污染了水体.
建筑湿地 (CWs) 提供生态去除.
新兴植物根排泄物和根球微生物在CW去除中的作用尚不清楚.

研究的目的:

研究有机和氨基酸对新生植物根球中的循环微生物的影响.
了解根排泄物,根球微生物群落和表面流动构造湿地 (SFCWs) 中的去除之间的关系.
阐明根排泄物和微生物活动在处理猪废水中的协同机制.

主要方法:

在三种新兴水生植物的SFCW实地研究.
根排泄率的分析 (有机和氨基酸).
在根球土壤中量化循环微生物基因 (AOA,AOB,nirS,nirK,hzsB,16SrRNA).
相关性和回归分析将排泄物,微生物丰富度和去除效率联系起来.

主要成果:

在SFCW中的Pontederia cordata实现了81.20%的总去除.
在Iris pseudacorus和P. cordata中,有机和氨基酸排泄随着时间的推移而增加.
在不同植物的根球中发现了不同的微生物群落,其中P. cordata表现出更高的关键循环基因丰度.
有机和氨基酸排泄与树根球微生物丰富度正相关.
度 (TN,NH4+-N,NO3--N) 和EC与排泄物和微生物丰度有负相关性.

结论:

新生植物的有机和氨基酸分泌刺激了猪废水处理的SFCW中的根球微生物.
根排泄物和根球微生物协同作用,增强SFCW中的去除.
这项研究阐明了新兴植物对建筑湿地中去除的机制.

关键词:

气气是一种气.球微生物球微生物根部排泄根部排泄表面流动构造湿地表面流动构造湿地猪的废水是猪的废水.

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