海绵铁丰富了自营/有氧脱细菌,以增强批量反应堆测序中的脱
Wenxuan Li1, Xinjuan Chen2, Tianxue Yang3
1State Environmental Protection Key Laboratory of Ecological Effect and Risk Assessment of Chemicals, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
Bioresource technology
|July 10, 2024
概括
海绵铁通过促进关键酶活动和增加有益细菌种群来增强污泥系统中的生物脱. 这导致了显著改善的氨降解和减少废水处理中的酸盐积累.
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:
- 生物脱对于废水处理至关重要.
- 铁 (SFe) 在增强脱化方面表现有前途.
- SFe对微生物群落的影响的确切机制尚未完全理解.
研究的目的:
- 为了研究海绵铁泥系统的脱性能.
- 为了分析受海绵铁添加影响的微生物特征.
- 阐明SFe泥系统中改进的脱化背后的机制.
主要方法:
- 常规污泥和SFe-污泥反应堆在序列批次操作中的比较.
- 测量的降解速度和酸盐的积累.
- 对酶活性 (酸盐和酸盐还原酶) 的分析.
- 使用16S rRNA测序 (含有丰度数据) 的微生物社区分析.
主要成果:
- 泥反应堆的氨降解率为94.0%.
- 在SFe泥系统中,酸盐的积累是SFe泥系统的1.5-53.3倍.
- 添加SFe增加了酸盐和酸盐还原酶的活动.
- 自营性脱细菌的相对丰度增加了10.6%.
- 有氧脱细菌的相对丰度增加了5.3%.
结论:
- 海绵铁显著提高了污泥系统中的生物脱效率.
- SFe通过增加关键酶活动和促进有益的微生物群落来增强脱化.
- 该SFe-泥系统有效地处理低碳比的废水.
- 自营和有氧脱细菌的丰富是关键机制.
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