在五个完整尺寸的去化生物反应堆中生产和消耗氧化和甲,这些生物反应堆处理地下排水
Ann M Brunton1, Julie L Zilles1, Richard A Cooke1
1University of Illinois at Urbana-Champaign, AW-101 Turner Hall, 1103 South Goodwin Avenue, Urbana, IL 61801, United States of America.
The Science of the total environment
|February 16, 2024
概括
木片生物反应器有效地去除酸盐,产生的氧化 (N2O) 和甲 (CH4) 最少. 这些气候智能系统为排水的农业地区提供了实际的水质改善.
科学领域:
- 环境科学 环境科学
- 农业工程 农业工程
- 水质管理水质管理
背景情况:
- 在去化生物反应器中去除酸盐对于水质至关重要.
- 已知影响酸盐去除的因素,如流量和水化学.
- 这些因素对氧化 (N2O) 和甲 (CH4) 生产的影响尚不清楚.
研究的目的:
- 研究木片生物反应器中温室气体 (N2O和CH4) 的产生.
- 评估生物反应器设计和运行因素对温室气体排放的影响.
- 评估生物反应器在减轻污染和气候影响方面的作用.
主要方法:
- 监测美国伊利诺伊州的五个大型木片生物反应堆.
- 测量酸盐 (NO3-),N2O和CH4 (溶解和表面流量) 的含量.
- 在不同生物反应器年龄和排水区域进行的采样活动.
主要成果:
- N2O生产率平均为1.0毫克N2O-N/m3-d (表面) 和24毫克dN2O-N/m3-d (溶解) 的.
- 产量平均为6.0毫克CH4C/m3d (表面) 和310毫克dCH4C/m3d (溶解).
- N2O是在一个地点消耗的;CH4主要是在三个地点生产的. 土壤覆盖减少了CH4表面流. 脱化效率很高,只有0.51%的去除的酸盐被释放为N2O.
结论:
- 木片生物反应器证明了高效的酸盐去除与低净温室气体排放.
- 生物反应器通过减少间接的N2O排放,为气候智能化水资源管理做出贡献.
- 生物反应器是改善农业地区水质的实际解决方案,尽管需要进一步的温室气体研究.
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