通过使用厨房废弃物水解剂,在不显著增加氧化排放的情况下,在污水处理中实现了增强的除
Xuwei Gui1, Zhengjiang Wang1, Kaili Li2
1Chongqing Key Lab of Soil Multi-Scale Interfacial Process, College of Resources and Environment, Southwest University, Chongqing 400716, China.
The Science of the total environment
|September 30, 2023
概括
厨房废物化剂 (KWH) 有效地去除废水处理中的总,而不会增加氧化 (N2O) 排放. 这项研究表明,KWH增强了微生物多样性,并促进了高效的脱化,使其成为安全的替代碳来源.
科学领域:
- 环境科学 环境科学
- 环境工程 环境工程
- 微生物学 微生物学
背景情况:
- 厨房废物水解盐 (KWH) 是废水处理厂 (WWTP) 的一个有前途的替代碳来源,以改善总 (TN) 的去除和降低运营成本.
- KWH含有复杂的有机物质,引发了人们对氧化物 (N2O) 排放的潜在增加的担忧,而不是传统的碳来源,如葡萄糖 (Glu) 和酸 (NaAc).
研究的目的:
- 为了比较KWH,Glu和NaAc对污水处理过程中的N2O排放的影响.
- 调查这些碳来源对微生物群落和参与化和脱的关键基因的影响.
主要方法:
- 使用KWH,Glu和NaAc作为碳来源进行了废水处理实验.
- 测量了N2O排放量,并使用分子技术量化了关键功能基因 (narG,nirK,hzo,nosZ) 的丰度.
- 分析了微生物多样性和社区组成.
主要成果:
- 增加KWH并没有显著增加N2O排放,转换率为5.61%.
- Glu和NaAc显著增加了narG基因丰富度,表明更快的初始脱,而KWH显著增加了nirK,hzo和nosZ基因丰富度,表明更完整的N2O减少.
- KWH增强了微生物多样性,并促进了参与有效去除的特定细菌 (Comamonadaceae,Rhodobacteraceae) 的生长.
结论:
- 厨房废物水解剂是污水处理的安全有效的碳来源,改善了污染物去除,没有显著的N2O排放.
- 与传统碳来源相比,KWH促进了有利于增强脱和减少温室气体排放的微生物环境.
- 这项研究强调了KWH作为优化废水处理过程的可持续解决方案的潜力.
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