在接种期间补充硫化物,以提高硫自性脱性能和适应低温
Xiang Qi1, Jinbin Han1, Ziwei Kou1
1State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, PR China.
The Science of the total environment
|August 20, 2023
概括
将硫化物添加到元素硫 (S0) 自性脱 (SAD) 中,可显著提高酸盐去除率,并加快反应堆启动速度. 这种方法增强了生物膜的发展,提高了废水处理中的性能和低温适应性.
科学领域:
- 环境科学 环境科学
- 水处理工程水处理工程
- 微生物生态学 微生物生态学
背景情况:
- 元素硫 (S0) 自性脱 (SAD) 是一种具有低成本和最小污染的先进废水处理技术.
- 对于SAD应用的挑战包括较低的脱率,较长的启动时间和在低温下性能差.
- 硫化物在将S0转化为多硫化物方面发挥着关键作用,增强了SAD过程.
研究的目的:
- 调查补充硫化物对增强S0自性脱 (SAD) 的影响.
- 评估硫化物应用对反应堆启动,脱率和低温性能的影响.
- 确定硫化物应用的最佳策略,以实现持续的SAD效率.
主要方法:
- 进行了批量实验,使用S0作为电子捐赠者,并没有补充硫化 (Na2S).
- 一个用S0颗粒接种的包装床反应堆 (PBR) 用于评估在启动阶段硫化物的作用.
- 对反应堆的性能进行了监测,以检测其酸盐去除速度,启动时间以及在低温条件下 (15°C) 的稳定性.
主要成果:
- 补充硫化物显著增加了聚硫化物生成和酸盐去除率,达到高达11.3 mg-N/L·d,比对照组高3.8倍.
- 在PBR的注射过程中使用硫化物导致了2天的快速启动,平均脱率为346.9mg-N/L·d,比对照高1.4倍.
- 与对照反应堆相比,硫化物注射反应堆在15°C时表现出较好的酸盐去除性能,这是由于生物膜发育良好.
结论:
- 补充硫化物通过促进多硫化物形成和改善酸盐的去除,有效地增强S0自性脱.
- 在装载床反应堆的注射阶段应用硫化物显著加快了启动,并促进了强大的生物膜的发展.
- 硫化物注射为改善SAD性能和适应低温提供了可持续的解决方案,克服了该技术的关键局限性.
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