沉时间和有机载荷率对处理高强度废水的有氧颗粒化工艺的影响
Kyung Jin Min1, Eunyoung Lee2, Ah Hyun Lee2
1Department of Tech Center for Research Facilities, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul, 05029, South Korea.
Heliyon
|September 9, 2024
概括
减少有氧颗粒污泥 (AGS) 过程中的沉时间,提高了废水处理效率. 这种优化提高了污泥沉降性和微生物稳定性,这对于高度废水处理至关重要.
科学领域:
- 环境工程 环境工程
- 生物技术是生物技术.
- 废水处理 废水处理
背景情况:
- 有氧颗粒污泥 (AGS) 工艺具有优势,但在广泛实施方面面临挑战.
- 高有机负载比 (OLR) 对AGS的形成和稳定性产生负面影响,限制了商业化.
- 使用AGS有效处理高度废水需要优化操作策略.
研究的目的:
- 调查高度废水的AGS工艺的颗粒和处理效率.
- 评估不同的有机负载比率 (OLR) 和沉降时间对AGS性能的影响.
- 在不同的操作条件下分析污泥特性,细胞外聚合物 (EPS) 和微生物群落.
主要方法:
- 在0.167,0.33和1公斤COD/m3·day的OLR中运行了三个连续批量反应堆 (R1,R2,R3).
- 将沉降时间从90分钟缩短到30分钟,以评估对污泥沉降能力的影响.
- 分析的污泥特性,EPS含量,PN/PS比,以及微生物多样性.
主要成果:
- 减少沉降时间显著提高了污泥沉降能力,降低了SVI30高达50.8%.
- 反应堆R2的PN/PS比为4.3,EPS增加了1.52倍,污泥附着增加了1.41倍,这表明AGS成熟.
- 有机负载比影响了微生物群的丰富性,特别是蛋白质细菌和细菌体.
结论:
- 优化结算时间是改善AGS流程性能和稳定的关键操作策略.
- 这项研究为管理高度废水处理的AGS提供了有价值的见解.
- 操作策略显著影响AGS系统的生物稳定性和效率.
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