可回收的阴离子交换树脂驱动的废弃活性污泥发酵在连续批次平行模式:长期树脂/再生物回收稳定性和三重驱动机制
Heliang Pang1, Lei An2, Jiangbo Ding3
1Shaanxi Key Laboratory of Environmental Engineering, School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China; State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), Harbin Institute of Technology, Harbin 150090, PR China.
Water research
|April 24, 2025
概括
本研究引入可回收的阴离子交换树脂 (CER),以改善废物活性污泥发酵,增强短链脂肪酸生产和污泥减少. 通过去除金属,促进水解,新陈代谢和微生物平衡,CER有效地克服了限制.
科学领域:
- 环境工程 环境工程
- 生物技术是生物技术.
- 废物管理 废物管理
背景情况:
- 废物活性污泥 (WAS) 管理面临着无氧酸性发酵的挑战,包括低效的水解,新陈代谢和混乱的微生物群落.
- 目前解决这些局限性的解决方案往往是昂贵的,能源密集的,只解决单一问题,阻碍了广泛采用.
- 可回收的阴离子交换树脂 (CER) 提供了一种新的方法,通过去除污泥原生金属,同时解决这些限制.
研究的目的:
- 研究可回收的CER驱动污泥发酵系统的长期性能和机制.
- 评估CER在克服废弃活性污泥中关键发酵能力限制方面的有效性.
- 评估基于CER的污泥管理工艺的经济可行性和运行稳定性.
主要方法:
- 建立了一个使用可回收的CER与再生剂重复使用的连续污泥发酵系统.
- 分析了CER的金属物种化和去除,重点是有机结合和残留的Ca&Mg.
- 监测了水解速率,代谢电子转移活动和微生物群落转移.
- 短链脂肪酸 (SCFA) 生产,污泥减少和CER再生效率在长时间内得到量化.
主要成果:
- CER有效地去除了结构金属,通过打破金属桥接点和键来促进协同性水解 (高达30.05%).
- 由于氧化还原介质的释放,代谢电子转移活动增加了1.58倍.
- SCFA积累平均增加了2.52倍,污泥固体减少了55.87%.
- 在18个循环中,CER表现出极好的可回收性,能力损失微不足道 (≤3.53%),在72天内保持稳定的性能 (RSD ≤7.88%).
- 发酵产品是高质量的碳来源,由于CER介导的NH4+交换,含含量低.
结论:
- 可回收的CER是一种高度有效的技术,可以通过同步解决多个限制来增强无氧污泥发酵.
- 基于CER的工艺显著改善了SCFA生产和污泥减少,同时具有成本效益和稳定性.
- 这种创新方法为可持续的废物活性污泥管理提供了一个有希望的解决方案,有可能带来经济回报.
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