污泥性发酵液体料测序批量反应堆的废水中的溶解有机物质的化学特征
Sijia Ma1, Chengyu Gu1, Dongli Yang1
1State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, Jiangsu, China.
Journal of environmental management
|February 29, 2024
概括
污泥性发酵液 (SAFL) 改善了废水中的去除,但增加了耐火溶解有机物 (DOM). 较长的保留时间有助于SAFL养系统中的DOM降解.
科学领域:
- 环境科学 环境科学
- 水处理工程水处理工程
- 生物技术是生物技术.
背景情况:
- 污泥性发酵液 (SAFL) 是一种可行的替代品,用于增强废水处理中的生物去除 (BNR).
- 在SAFL养BNR工艺的废水中溶解有机物 (DOM) 的特征尚不清楚,特别是在耐火化合物方面.
研究的目的:
- 为了比较研究DOM的分子重量分布,光成分和分子概况,从SAFL养和酸养测序批量反应堆 (S-SBR和A-SBR) 的废水中.
- 评估不同液压保留时间 (12小时和24小时) 对两种反应器类型DOM特性的影响.
主要方法:
- 使用的测序批量反应器 (SBR) 用SAFL或酸盐供应.
- 使用分子重量分布,光光谱学和分子分析技术分析了废水DOM.
- 研究了液压保留时间 (12h和24h) 的影响.
主要成果:
- 无论是SAFL还是酸盐,都实现了类似的废水总 (TN) 水平.
- 与酸盐料反应器相比,SAFL料反应器产生的生物耐火性和微生物衍生的DOM数量明显更高.
- 在废水DOM中,SAFL增加了高分子量有机物和类物质的比例,这表明反性更大.
- 来自S-SBR的废水DOM显示出更多样化的组成,含有更丰富的类和微生物衍生的分子.
- 延长的液压保留时间 (24小时) 丰富了特定的微生物群落 (Bacteroidota,Haliangium,未分类的Comamonadaceae),增强了S-SBRs中的DOM降解.
结论:
- 虽然SAFL对BNR有效,但它导致废水DOM增加,其特点是更大,更耐火化合物,包括来自微生物的化合物.
- 了解DOM特征和微生物动态对于优化SAFL养BNR过程至关重要.
- 根据这些发现,可以根据这些发现制定减少SAFL养BNR系统中的废水DOM的策略,可能涉及延长液压保留时间或有针对性的微生物干预.
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