通过添加带铁的二氧化石来改善主流的anammox工艺中的anammox颗粒污泥:性能和内在机制
Fanghua Xing1, Xuejie Ma1, Binbin Sun1
1School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin, 300401, China.
Environmental research
|January 11, 2025
概括
带铁的二氧化 (Fe-DE) 通过缩短启动时间和增加去除率,显著提高了anammox颗粒污泥 (AnGS) 的性能. 这种创新材料改善了污泥结构和微生物活动,以改善废水处理.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 材料科学 材料科学 材料科学
背景情况:
- 亚纳莫克斯 (无氧氨氧化) 对于废水处理中的去除至关重要.
- 提高anammox颗粒污泥 (AnGS) 的形成和性能对于高效的主流流程至关重要.
- 目前用于改进AnGS的方法通常面临效率和可扩展性的局限性.
研究的目的:
- 开发和评估含铁二氧化石 (Fe-DE) 作为一种创新材料,用于提高AnGS和主流anammox的性能.
- 调查Fe-DE对AnGS的启动期,去除率和微生物群落的影响.
- 阐明Fe-DE改善AnGS结构和功能的机制.
主要方法:
- 合成含铁二氧化 (Fe-DE) 的特定Fe:DE比率 (1:20).
- 在主流的anammox工艺中以3g/L的剂量应用Fe-DE.
- 监测工艺性能参数,包括启动时间和去除率.
- 分析AnGS属性,包括功能组,氧化还原物质和关键基因表达 (PleC,PleD,TrpE/G,hzs,hdh).
主要成果:
- 添加Fe-DE可以将anammox工艺启动时间从29天缩短到17天.
- 随着Fe-DE的应用,去除率从0.234kgN/m3·d增加到0.437kgN/m3·d.
- Fe-DE促进了AnGS中疏水功能组和氧化还原物质的生成,增强了粒子结构和电子转移.
- 质量检测基因 (PleC,PleD,TrpE/G) 和anammox相关基因 (hzs,hdh) 的表达显著增加.
- Fe-DE促进了AnGS的形成,并改善了Candidatus Brocadia的丰富.
结论:
- 带铁二氧化 (Fe-DE) 是一种有效的创新材料,用于增强主流的anammox工艺.
- Fe-DE 改善了 AnGS 的特性,微生物活动和去除效率.
- 这项研究为开发先进材料提供了一种新的方法,以提高废水处理性能.
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