在污泥的先进热水解中整合氧化的一种新策略
Phuong Linh Ngo1, Brent R Young2, Saeid Baroutian3
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
|November 13, 2023
概括
使用氧气的先进热水解显著提高了从污水污泥中产生生物气的产量. 最佳条件 (145°C,15分钟,20bar O2) 可以最大限度地提高产量,同时最大限度地减少抑制性化合物,以实现有效的无氧消化.
科学领域:
- 环境科学 环境科学
- 生物技术是生物技术.
- 化学工程是化学工程的重要组成部分.
背景情况:
- 越来越多的污水污泥生产给废水处理带来了环境挑战.
- 传统的热水解有诸如高能耗和氨释放等缺点.
- 提高污泥生物气产量对于可持续的废水管理至关重要.
研究的目的:
- 研究使用氧气进行先进的热水解 (ATH),以改善生物气生产.
- 为了优化污水污泥预处理的ATH参数 (温度,时间,氧气压力).
- 为了减轻与传统热水解相关的缺点.
主要方法:
- 使用ATH预处理污泥混合物 (55%初级,45%活性废物).
- 不同的温度 (100-145°C),处理时间 (5-30分钟) 和氧气压力 (10-30bar).
- 随后进行无氧消化,以测量生物气产量和分析污泥成分.
主要成果:
- 在145°C,15分钟和20bar O2.2下,达到最高的生物气产量 (增加了439.6mL/g VS).
- 这种最佳条件导致了低氨 (~302 mg/L) 和酸 (~559.7 mg/L) 度.
- 这些水平最大限度地减少了对随后的无氧消化过程的负面影响.
结论:
- 用氧气进行先进的热水解是一种有效的方法,可以增强从污水污泥中生产的生物气体.
- 优化的ATH参数显著提高了无氧消化污泥的可处理性.
- 这种方法为可持续的污泥管理和能源回收提供了一个有希望的解决方案.
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