单阶段与双阶段的部分化 - - 在超的条件下进行脱的anammox反应器系统
Lin Gao1, Samah Abasi1, Sheldon Tarre1
1Faculty of Civil and Environmental Engineering, Technion - Israel Institute of Technology, Haifa, 32000, Israel.
Chemosphere
|November 24, 2024
概括
这项研究比较了单阶段和两阶段的部分化 - 氧化 (PN/A) 系统,用于处理高盐度废水. 单阶段PN/A反应堆表现出较低的氧化排放量和稳定的性能,使其成为工业废水处理的有希望的选择.
科学领域:
- 环境生物技术环境生物技术
- 污水处理 污水处理 污水处理
- 微生物生态学 微生物生态学
背景情况:
- 工业化产生越来越多的高盐度废水,需要有效的处理方法.
- 部分化-阿纳摩克斯 (PN/A) 工艺是一种去除策略,在高盐度 (>3%盐度) 条件下进行的研究有限.
- 超废水的除尘处理由于微生物的适应性和过程稳定性而带来了独特的挑战.
研究的目的:
- 为了比较单阶段与双阶段PN/A反应堆系统对高盐废水 (4%盐度) 脱的有效性.
- 为了确定主导的微生物群落,负责两个反应堆配置的关键反应.
- 评估自由氨 (FA) 对工艺稳定性和去除效率的影响.
主要方法:
- 在4%盐度下运行的单阶段和双阶段完全混合固定床反应堆的比较分析.
- 监测化和阿纳摩克斯率,去除效率和微生物群落组成.
- 控制自由氨 (FA) 度的操纵,以评估其对酸盐氧化细菌 (NOB) 抑制和工艺稳定性的影响.
主要成果:
- 两阶段系统实现了较高的单个阶段速度 (化: 1.9 gN/L-reactor/d; anammox: 0.8 gN/L-reactor/d),但单阶段反应器的整体除尘率为 0.6 gN/L-reactor/d.
- 强制性类菌,Nitrosococcus oceani和Candidatus Scalindua wagneri,主导了两阶段系统,而Nitrosomonas marina和Candidatus Scalindua wagneri则是单阶段系统的关键.
- 维持FA> 1 mg/L选择性抑制NOB,确保稳定的化,而较低的FA导致酸盐积累.
- 与两级系统相比,单级PN/A反应堆的N2O排放量显著降低.
结论:
- 单阶段PN/A反应堆是一种可行且高效的超废水去化方法.
- 有效控制自由氨 (FA) 对于实现稳定的化和防止NOB活动至关重要.
- 单阶段PN/A工艺在减少N2O排放方面具有优势,使其成为处理高盐度工业废水的环境优选.
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