气体输送膜作为一种替代的通风方法,可以从无氧处理的废水中去除溶解的甲
1Australian Centre for Water and Environmental Biotechnology (ACWEB, Formerly AWMC), The University of Queensland, St. Lucia, Queensland 4072, Australia.
Water research
|November 13, 2024
概括
膜气化生物膜反应器 (MABR) 有效地从废水中去除溶解的甲和. 这项技术可以防止温室气体的释放,并提高处理效率.
科学领域:
- 环境工程 环境工程
- 微生物学 微生物学
- 废水处理 废水处理
背景情况:
- 废水中溶解的甲在传统处理过程中构成温室气体排放风险.
- 气泡通风可以导致大量的甲剥离,阻碍无氧处理效率.
- 膜气化生物膜反应器 (MABR) 提供高氧转移和低流,可能减轻甲脱落.
研究的目的:
- 调查MABRs在同时有氧去除溶解甲和无氧去除的有效性.
- 评估甲和除去过程的启动时间和效率.
- 确定和确认负责这些过程的微生物群落.
主要方法:
- 建立和运行膜气化生物膜反应器 (MABR).
- 长期监测溶解的甲和的去除速度.
- 在现场进行批量测试以确认微生物活性.
- 用于微生物社区分析的16S rRNA基因扩增序列测序.
主要成果:
- 在20天内实现了>90%的溶解甲去除,这表明有氧甲氧化启动时间很短.
- 通过anammox工艺达到约150 mg N/L/d (0.27 g N/m2/d) 的总去除率.
- 证实了关键细菌的存在和活性,包括氨氧化细菌,酸盐氧化细菌,anammox细菌和有氧甲营养菌.
- 丰富的酸盐/酸盐依赖的无氧甲氧化 (n-DAMO) 细菌达到2.5%的丰度,这表明它在合和甲去除中发挥了作用.
结论:
- MABRs提供了一种有效的替代技术,用于从无氧处理废水中并行去除溶解的甲和.
- 该MABR系统展示了快速建立有氧甲氧化以及高效的基于anammox的去除.
- 对n-DAMO细菌的丰富表明,在MABR中可能存在综合和甲循环.
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