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深入了解废物活性污泥消化背后的作用和微生物生态机制,这些作用和微生物生态机制是由通过多种模式激活的硫酸盐氧化引发的

Lijiao Yin¹, Aijuan Zhou², Yaoli Wei¹

¹College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, China.

Environmental research

|April 11, 2024

概括

使用不同激活模式 (铁,ZVI,UV,热) 进行废弃活性污泥的硫酸盐氧化 (PS) 预处理会影响污泥消化性能和微生物群落. 热激活最大限度地增加了短链脂肪酸,而ZVI增加了甲的产量.

科学领域:

环境科学环境科学
微生物学微生物学
化学工程是化学工程的重要组成部分.

背景情况:

硫酸盐氧化 (PS) 是由于自由基的产生,对废弃活性污泥 (WAS) 的前期处理具有前景.
了解PS激活模式在WAS消化中的产品差异和微生物机制至关重要.

研究的目的:

综合调查不同PS激活模式 (有铁,零价值铁 (ZVI),紫外线,热) 对污泥消化性能的影响.
阐明各种PS激活方法引起的微生物机制和微生物群落转移.

主要方法:

被铁,ZVI,UV和热激活的WAS的硫酸氧化.
分析甲生产,短链脂肪酸 (SCFA) 产量和酸盐转化.
使用MiSeq测序和分子生态网络分析进行微生物社区分析.

主要成果:

由ZVI (PS_ZVI) 激活的PS显著加速了甲生产 (12.02mL/gVSS).
热激活的PS (PS_Heat) 促进了污泥的酸化,产生最大的SCFA (277.11毫克COD/gVSS).
PS_Heat和PS_UV丰富了无氧发酵细菌,而PS_Ferrous和PS_ZVI丰富了甲基生物和Woesearchaeota.

结论:

不同的PS激活模式明显影响污泥消化性能,SCFA生产和微生物群落结构.
确定了特定的微生物相互作用,包括同类乙原体,减少硫酸盐的细菌和无氧发酵细菌之间的共生关系.
这项研究为应用基于硫酸盐基的氧化来从废物污泥中获得能源和化学回收提供了科学基础.

关键词:

激活方式激活模式无氧消化消化无氧消化透硫酸盐的使用情况废弃的活性污泥废弃物

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