从溶解分析中对污水污泥的热水解新见解
Phuong Linh Ngo1, Brent R Young2, Kevan Brian3
1Department of Chemical and Materials Engineering, The University of Auckland, Auckland, 1010, New Zealand; Department of Environmental Engineering, The Institute of Biotechnology and Environment, Nha Trang University, Viet Nam.
Chemosphere
|July 10, 2023
概括
热水解通过溶解污泥来增强生物气的生产. 闪光减压,一个关键的步骤,显著提高溶解和缩短反应时间,但可能会减少挥发性脂肪酸.
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:
- 热水解是一种无氧消化前处理,增强生物气生产.
- 了解污泥溶解机制对于优化生物气产量至关重要.
- 关于闪在热水解中的特定作用的知识有限.
研究的目的:
- 为了研究闪,反应时间和温度对热水解过程中污泥溶解的影响.
- 阐明溶解的机制,区分水解和闪效应.
- 评估闪对反应时间,污泥特性和无氧消化抑制剂的影响.
主要方法:
- 在不同反应时间和温度条件下使用热水解来处理泥.
- 通过化学分析对污泥溶解的评估.
- 在处理前后评估挥发性脂肪酸和抑制性化合物.
主要成果:
- 水解是主要的溶解过程 (76-87%).
- 闪光减压通过破碎细胞膜显著促进溶解 (13-24%).
- 闪将反应时间从30分钟缩短到10分钟,减少污泥颜色,最大限度地减少能源使用,并消除抑制化合物.
结论:
- 闪光减压是提高无氧消化热水解效率的关键因素.
- 优化闪参数可以导致更短的反应时间和更好的污泥质量.
- 在闪光过程中可能出现的挥发性脂肪酸损失需要仔细考虑过程经济性.
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