溶解氧对硫自性脱的作用及其应对方法:一项实验和建模工作
Ziwei Kou1, Pengfei Huo1, Xiang Qi1
1State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, PR China.
Water research
|September 21, 2024
概括
高溶解氧阻碍硫自脱 (SAD) 通过竞争电子. 内部反流有效地减轻了这种情况,大大提高了废水处理中的酸盐去除率.
科学领域:
- 环境微生物学环境微生物学
- 废水处理技术 废水处理技术
- 生物地质化学循环是什么
背景情况:
- 硫自脱 (SAD) 是处理废水废水的一种有前途的方法.
- 在二次废水中高流量溶解氧 (DO) 可以抑制SAD过程的效率.
- 了解DO对SAD的影响对于优化其应用至关重要.
研究的目的:
- 为了研究不同溶解氧 (DO) 度对硫自身化 (SAD) 的影响.
- 确定减轻高DO对SAD绩效负面影响的策略.
- 评估内部反流在 SAD期间克服DO抑制的有效性.
主要方法:
- 在不同DO度下对SAD性能进行实验分析 (0-0.5 mg/L,2.5-3.5 mg/L,5.5-6.5 mg/L).
- 酸盐去除率 (NRR) 测量和微生物群体分析 (氧化硫细菌的相对丰度).
- 建模和实验验证内部反流作为缓解策略.
主要成果:
- 低和中度的DO度没有显著影响NRR.
- 由于电子竞争和减少硫氧化细菌的数量,高DO度显著降低了NRR.
- 内部反流被确定为减轻高DO抑制的有效策略.
结论:
- 高度的DO度对废水处理中的SAD过程构成了重大挑战.
- 内部反流,特别是0.5的比率,可以在高DO环境中显著提高NRR.
- 这项研究提供了有价值的见解和战略,用于在高DO水平的真实废水处理场景中实施SAD.
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