在试点范围内实施主流的anammox,用于对抗寒冷温度的市政废水处理
Qi Zhao1, Yongzhen Peng1, Jianwei Li1
1National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing, 100124, China.
Nature communications
|November 28, 2024
概括
与anammox相结合的部分脱实现了冷市政废水中的高去除. 这一过程表现出显著的低温耐受性,使得非热带地区的废水可以得到可持续的处理.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 安纳莫克斯 (无氧氨氧化) 为市政废水处理提供了显著的能源和资源节约.
- 季节性低温阻碍了在非热带地区的anammox工艺的应用.
- 与anammox相结合的部分脱是一种有希望的替代性去除的方法.
研究的目的:
- 评估试点规模部分脱加上anammox工艺在季节性冷却下实际的市政废水中的性能.
- 评估这种联合工艺的低温耐受性和去除效率.
- 调查使得在低温下强大的anammox活动的潜在机制.
主要方法:
- 在中国北部运营一座50 m3/d试点规模的废水处理厂.
- 实施部分脱加上anammox工艺的部分脱.
- 监测去除效率,阿纳莫克斯率和微生物群落动态.
- 使用15N稳定同位素追踪和动力测试来阐明过程机制.
主要成果:
- 尽管季节性温度下降,但仍然保持了高除效率,从27.8-20.0°C的75.0%到10-7.5°C的70.4%.
- 该工艺表现出了显著的低温耐受性,在10-7.5°C时的in-situ anammox速率为32.7 g-N/m3·d.
- 部分脱提供了足够的亚酸盐以支持在较低的温度下anammox,和anammox细菌种群显著增加.
结论:
- 部分脱与anammox工艺相结合的部分脱方法在季节性寒冷条件下非常有效和坚固.
- 这项技术显示出扩展主流的anammox应用到非热带地区的巨大潜力.
- 该研究有助于实现废水处理部门的可持续发展目标.
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