生物载体和动态膜的合,以从污泥无氧发酵中增强挥发性脂肪酸的生产
Kai Chen1, Lisha Yang1, Jing Zhang2
1Beijing Key Lab for Source Control Technology of Water Pollution, Beijing Forestry University, Beijing 100083, China.
Bioresource technology
|October 30, 2024
概括
这项研究增强了使用聚乙烯生物载体和动态膜技术从污泥无氧发酵 (AF) 中恢复挥发性脂肪酸 (VFA). 这种新的方法显著提高了VFA产量,并控制了膜污染,以有效地回收资源.
科学领域:
- 环境科学 环境科学
- 生物技术是生物技术.
- 化学工程是化学工程的重要组成部分.
背景情况:
- 污泥无氧发酵 (AF) 在有效回收挥发性脂肪酸 (VFA) 方面存在挑战.
- 膜污染是污水处理和资源回收的动态膜 (DM) 工艺的一个主要限制.
研究的目的:
- 研究将聚乙烯 (PE) 生物载体与动态膜 (DM) 技术结合在无氧生物反应器中的协同效应,以增强VFA生产和改善膜污染控制.
- 评估PE生物载体对污泥水解,微生物群落结构和VFA产量的影响.
- 在VFA恢复效率和膜运行稳定性方面评估集成系统的性能.
主要方法:
- 使用了与聚乙烯 (PE) 生物载体和动态膜 (DM) 模块集成的无氧生物反应器.
- 分析了污泥颗粒大小,水解效率和微生物群体组成 (特别针对Christensenellaceae_R-7_组).
- 监控挥发性脂肪酸 (VFA) 生产和跨膜压力下降,以评估系统性能和膜污染.
主要成果:
- 达到1200mg/L的VFAs产量,比传统AF增加2.4倍,比单独使用DM增加1.7倍.
- PE生物载体促进了水解细菌的丰富,增强了有机物生物转化.
- 显著减少了DM污染,保持跨膜压力下降低于30kPa,而不需要清洁或更换膜.
结论:
- 聚乙烯生物载体和DM技术的结合提供了一种协同方法,可以有效地从污泥中回收VFA.
- 这个集成系统在VFA生产和膜污染缓解方面都表现出卓越的性能.
- 提出了一种新的和有前途的污泥资源回收和可持续废水管理战略.
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