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从低温和低强度的城市废水中进行主流的除,使用水凝封装的comammox和anammox
Bo Li1, Bruce J Godfrey1, Raymond RedCorn1
1University of Washington, Department of Civil & Environmental Engineering, Seattle, WA 98195, USA.
Water research
|July 7, 2023
概括
这项研究开发了一种新的水凝封装的comammox和anammox反应器,用于低温废水处理. 选择性加热技术即使在4°C,也保持了高去除效率.
科学领域:
- 环境微生物学 环境微生物学
- 废水处理工程 废水处理工程
- 生物技术是生物技术.
背景情况:
- 部分化 (PN) -安纳摩克斯工艺在主流废水处理中与低温和氨度作斗争.
- 传统的除方法耗费大量能源,在寒冷条件下效率较低.
研究的目的:
- 开发和评估PN-anammox系统,使用水凝封装的comammox和anammox来有效地从低温主流废水中去除.
- 研究一种新的选择性加热技术的有效性,以保持微生物活动和在低温下去除的性能.
主要方法:
- 一个连续流反应堆被设计成用凝封装的comammox和anammox细菌.
- 该反应堆使用合成和真实废水在10°C至4°C的温度下运行.
- 使用辐射来加热水凝中的碳黑,实施了选择性加热技术,以保持生物质活动.
主要成果:
- 该反应堆在10°C时实现了几乎完全的氨和总无机 (TIN) 清除.
- 在4°C时,去除的效率显著下降,直到采用选择性加热.
- 选择性加热使得89.4±4.3%的TIN在4°C的进气温度和5°C的反应堆温度下被去除,与10°C的性能相当.
- 在4°C时,comammox的丰度下降,但通过选择性加热恢复;anammox和comammox在水凝珠中保持空间组织.
结论:
- 凝封装的comammox和anammox,加上选择性加热,为冷废水中的主流捷径除提供了可行的解决方案.
- 选择性加热技术有效地保持微生物活动,并确保在低至5°C的温度下强大的除性能.
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