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用热性工艺分解消化的污泥,以增强生物气生产

Xiao Xu¹, Thomas Dockhorn²

¹Institute of Sanitary and Environmental Engineering, Technische Universität Braunschweig, Pockelsstr. 2a, Braunschweig 38106, Germany

Water science and technology : a journal of the International Association on Water Pollution Research

|August 14, 2025

概括

热后性处理 (TAP后) 有效地溶解消化的污泥 (DS),改善无氧消化 (AD). 这种方法提高了生物气的生产,减少了污泥的数量,为废水处理厂 (WWTP) 提供了显著的好处.

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:

消化污泥 (DS) 由于其高有机含量和大量,因此存在处置挑战.
有效的污泥分解对于增强后续处理过程,如无氧消化 (AD),至关重要.
优化有机溶解可以提高生物气产量,减少总体污泥质量.

研究的目的:

调查热后性过程 (TAP后) 用于消化污泥 (DS) 的分解.
评估TAP后对随后无氧消化 (AD) 的有机溶解的影响.
评估提高生物气产量,减少污泥量和发电的潜力.

主要方法:

使用热后性工艺 (TAP后) 处理了7个消化污泥 (DS) 样本.
处理过程涉及将其加热到160°C,持续30分钟,pH值在9到12之间.
然后对后处理的DS进行无氧消化 (AD),以测量生物气产量.

主要成果:

314-361 L/kg VSadded 的最大生物气产量在pH 9的TAP后得到了实现.
在七个被调查的废水处理厂 (WWTPs) 中,生物气的生产显示出364-4,423 m3/d的潜在改善.
一个WWTP模型显示,发电量增加了34%,污泥量减少了22%.
在一个模型焚烧厂中,脱水的DS (25%TS) 的电量余额增加了84.4千瓦时/米3.

结论:

后TAP是分解消化污泥 (DS) 的有效方法,显著改善有机溶解.
增强的溶解导致生物气产量的大幅增加和AD的整体能量回收.
该过程为减少污泥量和改善废物管理和能源生产中的能源平衡提供了可行的策略.

关键词:

生物气产量产生生物气.消化的污泥.能量回收可以回收能量.污泥焚烧污泥的焚烧方式热性处理热性处理

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