使用移动床生物膜 (MBBR) 配置处理无氧消化污泥的空气消化后处理能力增加四倍
Zhiyao Wang1, Xi Lu1, Min Zheng2
1Australian Centre for Water and Environmental Biotechnology (ACWEB, formerly AWMC) The University of Queensland St. Lucia Queensland 4072 Australia.
Water research X
|August 28, 2024
概括
本研究介绍了一种创新的酸性有氧消化工艺,在移动床生物膜反应堆 (MBBR) 中使用氨氧化细菌 (AOB) 快速稳定污泥. 这种新的方法在几天内显著减少了环境温度下的病原体和挥发性固体,降低了处置成本.
科学领域:
- 环境微生物学环境微生物学
- 废水工程 废水工程
- 生物技术是生物技术.
背景情况:
- 污水处理厂产生大量的污泥,需要稳定才能安全处置.
- 传统的生物污泥稳定方法需要长时间的保留时间或高温来使病原体失活.
- 现有的方法在污泥管理的效率和成本效益方面存在局限性.
研究的目的:
- 克服传统污泥稳定技术的局限性.
- 引入和评估一种用于污泥处理的新型酸性有氧消化工艺.
- 研究移动床生物膜反应器 (MBBR) 的应用,用于在污泥处理中保留特定细菌.
主要方法:
- 使用耐酸氨氧化细菌 (AOB),*Candidatus*Nitrosoglobus.开发一种酸性有氧消化过程.
- 移动床生物膜反应堆 (MBBR) 配置首次用于污泥处理以固定AOB.
- 实验室规模的有氧消化器被用于在环境温度 (20°C) 上处理无氧消化的污泥.
主要成果:
- 在20°C的3.5天保留时间内,病原体减少到低于A类稳定水平.
- 观察到明显的挥发性固体减少 27.4 ± 5.2%.
- 生物膜中的AOB保持了酸性pH和高化物水平,产生自由酸以加速稳定.
结论:
- 使用MBBR技术的新型酸性有氧消化过程,有效地在环境温度下快速稳定污泥.
- 与传统方法相比,这种方法显著加快了病原体无活化和挥发性固体的减少.
- 该过程为污泥处理提供了大量的资本和运营成本节省,提高了废水处理效率.
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