在催化湿气氧化过程中,通过N/MxOy有效地将城市污泥转化为实际的碳来源
Kaiyu Fang1, Yang Tong2, Yuting Zhu1
1State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, China.
Water research
|May 23, 2025
概括
这项研究开发了新的催化剂,将污泥转化为生物反应器的有价值的碳来源. 最好的催化剂Ru/TiO2有效地去除了,并从废水污泥中产生了高质量的碳来源.
科学领域:
- 环境化学环境化学
- 催化剂是一种催化剂.
- 废水处理 废水处理
背景情况:
- 污泥湿空气氧化的残留液体是富含挥发性脂肪酸 (VFA) 的潜在碳来源.
- 在这个过程中氨的积累阻碍了其作为碳来源在生物反应器中去除的使用.
研究的目的:
- 开发和评估新型N/MxOy催化剂,同时从污泥中去除和产生碳源.
- 优化催化剂性能,以最大限度地提高实际碳源 (PCS) 生产和挥发性脂肪酸 (VFA) 恢复.
主要方法:
- 使用贵金属 (Ru,Pt,Pd) 和金属氧化物支物 (Al2O3,TiO2,CeO2,ZrO2) 合成N/MxOy催化剂.
- 基于总 (TN) 去除,PCS和VFA生产的催化剂性能评估.
- 优化反应条件,包括温度,氧气压力,时间,pH值和催化剂剂量.
主要成果:
- 在优化条件下,Ru/TiO2表现出卓越的性能,达到94.6%的TN去除率和2760 mg/L的PCS度.
- 该工艺每公斤干污泥产生110.1g的COD碳源.
- Ru/TiO2催化剂表现出极好的可重复使用性,在四个循环后,PCS仅下降4.7%.
结论:
- 开发的Ru/TiO2催化剂有效地解决了氨的抑制,使得有效的去除和高质量的碳源从污泥生产.
- 这种方法为城市污泥资源利用提供了可持续的解决方案,提高了生物反应器去除的效率.
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