稳定连续流动的CANDAN工艺从anammoxUASB反应堆过渡,通过促进本地酸盐生产的脱化社区
Rui Du1, Meihui Tang1, Qingtao Liu1
1National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, Beijing 100124, China.
The Science of the total environment
|March 24, 2024
概括
该研究成功地将通过化-Anammox over Nitrite (CANDAN) 过程的完整氨和酸盐去除方法适应于连续流系统. 在Anammox-UASB反应堆中,这种稳定的去除方法实现了在10.0 mg N/L以下的绝佳总去除.
科学领域:
- 环境工程 环境工程
- 微生物学 微生物学
- 废水处理 废水处理
背景情况:
- 在批量反应堆 (SBR) 中有效的通过化-Anammox over Nitrite (CANDAN) 工艺进行完整的和酸盐去除,在连续流系统中面临挑战.
- 在连续流动反应器中建立稳定的去除需要优化微生物群落,以有效处理和酸盐.
研究的目的:
- 调查将CANDAN工艺转换为连续流量上游无氧污泥毯 (UASB) 反应堆的可行性.
- 通过引入外部有机物来促进本土酸盐生产的脱化社区,以补充anammox活动.
主要方法:
- 运行UASB反应堆150天使用家庭和含酸盐的废水.
- 引入酸 (COD/NO3--N = 2.0) 来刺激脱和酸盐的产生.
- 进行了 ex-situ 脱活动测试,以评估酸盐生产率和酸盐到酸盐转化率 (NTR).
主要成果:
- 实现了优异的总 (TN) 清除 (<10.0 mg N/L),料速率为0.54 L/h (家庭废水) 和1.08 L/h (含酸盐的废水).
- 添加酸引发了高效的脱,保持了NTR在90%以上,并支持了强大的anammox活性 (78.3 ± 8.0%的TN去除).
- 确定了关键的阿纳莫克斯细菌 (Brocadia,Kuenenia) 的稳定种群,避免了污泥漂浮问题.
结论:
- 该研究表明,在Anammox-UASB系统中,一个稳定高效的连续流动的CANDAN工艺.
- 亚纳摩克斯和脱细菌之间的协同作用是同时去除和酸盐的关键.
- 为建立强大的连续流动的除系统提供了宝贵的见解.
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