通过热预处理增强废物活性污泥的无氧消化:一个试点规模的研究
Biqing Li1, Yao Tang2, Xiannian Xiao1
1Guangzhou Sewage Purification Co., Ltd, Guangzhou 510655, China; These authors contributed equally to this work.
概括
热性水解显著增加了废物活性污泥 (WAS) 的甲产量. 这种预处理方法提高了污泥资源利用率,为污水处理挑战提供了可持续的解决方案.
科学领域:
- 环境科学 环境科学
- 化学工程是化学工程的重要组成部分.
- 生物技术是生物技术.
背景情况:
- 废物活性污泥 (WAS) 由于其复杂的组成和有害物质,存在环境和健康风险.
- 减少污泥和资源利用是现代废水处理和处置的关键要求.
- 直接无氧消化面临技术限制,需要先进的预处理策略.
研究的目的:
- 评估和比较废物活性污泥预处理的热和热水解.
- 为了确定这些水解方法的最佳实验条件和参数.
- 评估预处理对甲生产和整体污泥处理效率的影响.
主要方法:
- 使用两个不同的预处理技术进行了试点规模的实验:热水解和热水解.
- 调查的关键参数包括水解温度,保留时间和度 (NaOH).
- 测量了甲产量和能源消耗,以评估处理性能.
主要成果:
- 热水解的最佳条件被确定为70°C,4-8小时的保留时间和0.0125-0.015公斤NaOH/公斤干污泥的度.
- 热处理显著提高了甲的产量,NaOH的添加使甲产量比单独的热水解增加了31.2%.
- 80%含水量的污泥的平均能源消耗量为75千瓦时/立方米.
结论:
- 热水解是一种优质的预处理策略,用于增强废物活性污泥的甲生产.
- 这种综合方法为污泥资源利用提供了一种高效的方法,解决了直接无氧消化的局限性.
- 这些发现为开发有效的无氧消化技术提供了有价值的预处理策略,用于特征性污水污泥,特别是在南部地区.
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