容易生物降解的有机碳释放在深床的慢砂过器过器
Shreya Ajith Trikannad1,2, Jan Peter van der Hoek1,3, Yuwei Huang1
1Department of Water Management, Delft University of Technology, Building 23, Stevinweg 1, 2628 Delft, The Netherlands.
概括
缓慢的沙过器 (SSFs) 在它们的顶层中清除容易生物降解的溶解有机碳 (DOC). 较深层释放,然后去除DOC,对饮用水质量至关重要.
科学领域:
- 环境科学 环境科学
- 水处理工程水处理工程
- 微生物学 微生物学
背景情况:
- 慢砂过器 (SSF) 对于饮用水处理至关重要,主要以其顶层 (Schmutzdecke) 而闻名.
- 最近的研究承认更深层的过层在去除溶解有机碳 (DOC) 和氨 (NH4+) 中的作用.
- 了解整个过深度的DOC动态对于优化生物水处理至关重要.
研究的目的:
- 调查DOC的发生和潜在释放途径,无论是在成熟的,全面的,还是年轻的,基于实验室的SSF中.
- 为了确定不同的过深度对DOC去除和释放的贡献.
- 提供对驱动SSF内部DOC转换的微生物过程的洞察力.
主要方法:
- 在SSF中分析不同深度 (0-90厘米) 的DOC度和表征 (例如,低分子量酸,构建块).
- 在成熟的操作过器和新建立的实验室过器中对DOC配置文件进行比较.
- DOC释放与化状态和潜在微生物活动的相关性.
主要成果:
- 上方5厘米的SSF有效地减少了易于生物降解的DOC.
- 中层 (20-60厘米) 呈现出DOC释放,特别是低分子量化合物,与几乎完全的化相吻合.
- 最深层 (60-90厘米) 表明随后的去除释放的DOC和显著的酸盐 (PO43-) 减少.
结论:
- 这项研究提供了第一个证据,证明在SSF中可生物降解的DOC释放.
- 在中间层释放的DOC可能与微生物对营养限制或DOC转化反应有关.
- 最深层的过层在去除释放的DOC和保持整体废水质量方面发挥着至关重要的作用,影响碳循环.
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