实际农村污水收集系统中的细菌差异是由位置,季节和系统类型引起的
Wenkai Li1, Tianlong Zheng2, Ke Feng3
1SCEGC No. 12 Construction Engineering Group Co., Ltd., Ankang National High-tech Industries Development Zone, Ankang, Shaanxi, 725000, China.
Environmental research
|September 1, 2023
概括
农村污水系统中的细菌对运营有重大影响. 位置和季节影响细菌群落,关键细菌如硫酸盐减少细菌 (SRB) 在温暖的月份和生物膜中更为丰富.
科学领域:
- 环境微生物学环境微生物学
- 废水工程 废水工程
- 公共卫生 公共卫生
背景情况:
- 农村污水收集系统面临来自细菌活动的运行风险,包括沉和气体积累.
- 了解细菌社区动态对于管理这些风险和改善污染物预处理至关重要.
- 位置,季节和系统类型等因素显著影响细菌种群.
研究的目的:
- 分析位置,季节和系统类型对农村污水收集系统中的细菌群落的影响.
- 确定关键的细菌群体,包括减少硫酸盐的细菌 (SRB),氧化氨的细菌 (AOB),氧化的细菌 (NOB) 和与水有关的致病性细菌 (WPB).
- 提供数据,以加强这些系统的运行和维护风险控制.
主要方法:
- 分析了来自八个村庄的农村污水收集系统的96个样本.
- 利用16S rRNA全区域测序进行全面的细菌社区分析.
- 根据样本位置 (下水道,生物膜,沉积物),季节 (冬季/春季与夏季/秋季) 和系统类型 (下水道,沟) 进行了调查.
主要成果:
- 细菌群体受到位置和季节的显著影响,受到温度,污水质量和生存偏好的驱动.
- 发现了13个SRB,2个AOB,2个NOB和9个WPB的属.
- SRB,AOB,NOB和WPB主要存在于生物膜或沉积物中,而不是在自由污水中.
- 在夏季/秋季 (~2.19%) 的SRB丰度高于冬季/春季 (~0.41%),具有明显的季节性WPB分布.
- 在下水道和沟之间观察到SRB,AOB,NOB和WPB的显著差异.
结论:
- 位置和季节是塑造农村污水系统中的细菌群落的关键因素.
- 特定的细菌群体,包括SRB,AOB,NOB和WPB,在生物膜和沉积物中普遍存在.
- 季节性变化和系统类型 (下水道与沟) 影响这些细菌的数量和分布.
- 这些发现为改善农村污水收集系统的运行和维护风险控制提供了必要的参数.
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