通过美国增强的Fe2+激活硫酸盐进行协同污泥调节:物理化学性质和机制
Zhiying Lv1, Hong You2, Mingze Xu3
1State Key Laboratory of Urban Water Resources and Environment, Harbin Institute of Technology, Harbin, 150090, China.
Chemosphere
|July 4, 2024
概括
超声波激活的硫酸盐与铁离子有效地去除污泥的水分,显著减少水分和增加有机碳. 这种污泥处理方法通过分解复杂的有机物质来提高脱水能力.
科学领域:
- 环境工程 环境工程
- 水处理技术水处理技术
- 材料科学 材料科学 材料科学
背景情况:
- 污泥排水对于废水处理至关重要,影响能源消耗和碳足迹.
- 现有的方法经常面临效率和污泥质量方面的挑战.
- 开发可持续和有效的污泥处理工艺是优先考虑的.
研究的目的:
- 调查超声合双价铁离子活性硫酸盐 (US/Fe2+/PDS) 对于污泥脱水的疗效.
- 提高有机物质含量和改善污泥蛋糕质量.
- 为了阐明除水和污泥裂解机制.
主要方法:
- 使用双价铁离子 (Fe2+) 和硫酸盐 (PDS) 对污水污泥进行超声波 (US).
- 优化参数,如美国功率,Fe2+剂量,PDS剂量和治疗时间.
- 使用毛细管吸收时间 (CST) 和水分含量分析脱水能力.
- 量化有机碳含量和挥发性脂肪酸.
- 通过激进和非激进的途径研究污泥裂解机制.
主要成果:
- 降低了79.74%的CST,并在脱水的污泥蛋糕中达到56.51%的重量含水量.
- 有机碳含量增加了四倍,具有更丰富的短链挥发性物种.
- 确定硫酸盐基 (SO4·−) 是主导的,有基 (·OH),超氧化基 (O2·−) 和单片氧 (1O2) 的贡献.
- 已证明细胞外聚合物质 (EPS) 的降解成较小的分子,降低了保持水的能力.
- 展示了降低的静电力和界面自由能量,增强自我花和移动性.
结论:
- 美国/Fe2+/PDS系统在污泥脱水和裂方面非常有效.
- 该过程通过增加有机碳含量,显著提高了污泥质量.
- 机械洞察力揭示了激进和非激进的途径,有助于增强脱水能力,支持实际应用.
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