试点规模的污水污泥现场生物甲化:气体循环方法的影响
Shinya Akimoto1, Jun Tsubota1, Irini Angelidaki2
1Energy Technology Laboratories, Osaka Gas Co., Ltd., Osaka 554-0051, Japan.
Bioresource technology
|September 25, 2024
概括
试点规模的污水污泥生物甲化实现了高转化和甲含量. 气体循环提高了效率,为废水处理中的实际应用提供了见解.
科学领域:
- 环境工程 环境工程
- 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:
- 污水处理厂产生大量的污水污泥.
- 污泥高效转化为生物气 (生物甲化) 对于可持续的废物管理至关重要.
- 优化反应堆设计和操作参数是最大限度地提高生物甲化效率的关键.
研究的目的:
- 评估试点规模现场生物甲化反应堆的甲化效率和运行稳定性.
- 将试点级反应堆的性能与实验室级的装置进行比较.
- 研究气体循环策略对转化效率的影响.
主要方法:
- 使用2m3试验规模的现场生物甲反应堆和实验室规模的反应堆.
- 使用现场的污水污泥作为基板.
- 在各种条件下运行试点反应堆137天,包括最后30天的稳定运行.
- 研究了注射和气体循环的效应,无论是单独的还是组合的.
主要成果:
- 实现了高转换效率96.7% (实验室) 和97.5% (试点).
- 获得的平均甲含量为84.2% (实验室) 和83.2% (试点).
- 在pH值为8.2的情况下,经过30天的稳定运行,具有高的生物甲化效率.
- 证实,气体循环可显著提高转化效率.
结论:
- 试点规模的污水污泥生物甲化是一个可行的和高效的过程.
- 气体循环是提高生物甲化中的转化效率的有效策略.
- 研究结果为为工业生物甲化应用选择最佳气体循环方法提供了有价值的数据.
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