在超低氧气条件下,去除效率和同时化和脱过程的路径
Yu Xiang1,2,3, Xiangtian Man1,2, Han Zhang1,2
1School of Environmental Science and Engineering, Southwest Jiaotong University, Chengdu, People's Republic of China.
Environmental technology
|September 10, 2025
概括
这项研究优化了同时化和脱 (SND) 以节省废水处理中的能源. 超低溶解氧条件实现了超过80%的去除,突出了高效的微生物通路.
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:
- 在废水处理中,通风是主要的能源消耗者.
- 同时化和脱 (SND) 提供了减少能源的潜力.
- 在超低溶解氧 (DO) 下优化SND对于能源效率至关重要.
研究的目的:
- 调查在SND过程中减少通风能耗的策略.
- 评估液压保留时间 (HRT) 和碳与 (C/N) 比率对在超低DO下去除的影响.
- 为了阐明微生物机制驱动转化在这个低能耗系统.
主要方法:
- 建设和运营一个SND反应堆,处理低C/N的家用废水.
- 系统评估HRT和C/N比率对去除性能的影响.
- 批量实验以确定化和脱率.
- 高通量测序和元基因组分析以确定关键的微生物群落和酶.
主要成果:
- 在超低DO (<0.05 mg·L−1) 条件下稳定运行,在C/N比率为2.2的情况下,达到>80%的SND效率.
- 缩短HRT破坏了表现的稳定性,而增加C/N比率恢复了稳定性.
- 化和脱率分别在4.20-30.89 mg·L−1·h−1和1.57-21.92 mg·L−1·h−1之间.
- 微生物分析显示异构化和有氧脱化占主导地位,利用低能睡眠和nirK酶.
结论:
- 超低DO条件是通过SND有效的通过SND有效的节能去除的.
- 涉及特定酶 (nap,nirK) 的微生物适应促进了低能环境中的转化.
- 结果提供了对优化废水处理以减少能源消耗的见解.
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