对于废水污泥的石灰稳定过程中病毒微生物失活的机制性见解
Weijun Zhang1, Yuxi Zong2, Jianbo Zhang3
1Hubei Key Laboratory of Yangtze Catchment Environmental Aquatic Science, School of Environmental Studies, China University of Geosciences, Wuhan, Hubei 430074, China; National Engineering Research Center of Industrial Wastewater Detoxication and Resource Recovery, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
Journal of hazardous materials
|December 17, 2024
概括
石灰处理 (CaO/CaO2) 部分失活的污泥病毒,CaO2 协助水解,CaO 向植物病毒. 石灰也不能完全抑制病原体,这表明需要结合的工艺来安全地处理污泥.
科学领域:
- 环境微生物学 环境微生物学
- 废水处理 废水处理
- 病毒学 病毒学
背景情况:
- 废水污泥中的病原体灭活对于公众和环境健康至关重要,特别是在紧急情况下.
- 据报道,石灰 (CaO/CaO2) 对污泥中的病毒失活有效,但机制和对人类健康的影响尚不清楚.
研究的目的:
- 用氧化 (CaO) 和过氧化 (CaO2) 评估废水污泥中病毒微生物的无活化.
- 阐明病毒失活的机制,并确定影响处理后病毒再生的因素.
主要方法:
- 病毒元基因组测序以评估病毒病原体的无活化.
- 基因转录组分析用于调查与病毒再生相关的基因表达模式.
- 对污泥水解和病毒病原体抑制的CaO和CaO2处理的评估.
主要成果:
- 通过氧化基生成,CaO2增强了污泥水解,并通过破坏细胞外聚合物物质 (EPS) 抑制了包裹病毒.
- 氧化使大多数非包裹植物病毒失活,但特定的人类和植物病毒 (Feirsviridae,Solemoviridae) 在处理后增加.
- 观察到不同的基因表达模式:CaO处理的污泥中的脂聚糖化物生物合成和氨基酸-tRNA合成酶,以及CaO2处理的污泥中的核糖体形成与RNA病毒的再生有关.
结论:
- 单独的CaO和CaO2都不能完全消除废水污泥中的病原体.
- 需要进一步考虑CaO和CaO2对病毒病原体多样性,丰富性和微生物群代谢功能的影响,这些功能会影响病毒的抑制和再生.
- 为了有效和安全的污泥管理,建议采用组合处理工艺,特别是在紧急情况下.
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