通过具有内部循环的自营生物反应器从废水中进行反子排毒的S0依赖生物降解
Dongjin Wan1,2,3, Zhan Shen1, Naiyuan Shi1
1College of Environmental Engineering, Henan University of Technology, Zhengzhou, 450001, China.
Biodegradation
|October 23, 2024
概括
在硫自生物反应器 (SABIR) 中的内部循环有效地从污染水中去除反 (Sb(V)) 和总反 (TSb). 这种方法增强了质量转移和硫化物回流,提高了抗氧化物去除效率和稳定性.
科学领域:
- 环境科学 环境科学
- 环境工程 环境工程
- 微生物学 微生物学
背景情况:
- 元素硫 (S0) 自营降解显示出从水中去除反子[SbV]的前景.
- 有效地去除总抗氧化物 (TSb) 仍然是现有的S0自生物反应器 (SABIR) 方法的挑战.
- 水中的反污染对环境和健康构成重大风险.
研究的目的:
- 通过SABIR的内部循环,增强从污染的水中去除总 (TSb) 的能力.
- 研究液压保留时间 (HRT) 和反流比对Sb(V) 和TSb去除的影响.
- 阐明微生物群落结构和参与抗氧生物降解和去除的关键属.
主要方法:
- 建立和运营一个具有内部循环系统的SABIR.
- 操纵液压保留时间 (HRT) 和反流比以优化性能.
- 分析水的化学成分,包括Sb,V,TSb,SO和度.
- 使用SEM-EDS,拉曼光谱,XRD和XPS进行沉物的表征.
- 通过高通量测序进行微生物社区分析.
主要成果:
- 在8小时的HRT中实现了完全的Sb(V) 减少 (10 mg/L) 和显著的TSb去除 (<0.26 mg/L残留Sb(III))
- 增加的反流比与Sb(V) 和TSb去除效率正相关.
- 硫不成比例被确定为SO2-生成的主要来源,SO2-水平明显高于理论预期.
- 内循环通过改善质量转移和重新流动产生的硫化物来增强TSb的去除,而不会显著影响SABIR的稳定性.
- 被识别为Sb2S3和Sb-S化合物的沉物,表明有效的抗封存.
- 主导的微生物系,包括未分类的-蛋白质细菌,硫菌和硫酸菌,都与Sb(V) 生物减少有关.
结论:
- 内部循环是一种有效的策略,可以在SABIR系统中提高TSb去除Sb (V) 污染水的速度.
- 该研究为SABIR技术在处理污染废水中的实际应用提供了理论基础.
- 微生物群落在生物降解和去除反方面发挥着至关重要的作用.
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