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通过模块化生物反应器从农业排水中去除和

J S Strock¹, A Z Ranaivoson², G W Feyereisen³

¹University of Minnesota, Department of Soil, Water, and Climate and Southwest Research and Outreach Center, USA.

Journal of environmental management

|June 10, 2025

概括

这项研究测试了一种新的生物反应器,用于从农业排水中去除酸盐-和. 虽然对有效,但的去除有所不同,需要每年更换吸附材料.

科学领域:

环境工程环境工程
水质管理水质管理
农业科学农业科学

背景情况:

农业排水是酸盐- (NO3-N) 和 (P) 污染的主要来源.
木片去化生物反应器有效处理NO3-N,但显示不一致的P去除.
需要新的生物反应器设计来同时处理N和P.

研究的目的:

为了评估一个新的模块化,便携式,下游生物反应堆的NO3-N和P去除性能.
为了比较生物反应器内的三种不同的吸收介质 (钢,回收混凝土,石灰石).
评估外部碳源 (酸) 对脱的影响.

主要方法:

采用P吸收介质实施了下游生物反应器设计,其次是玉米和木片.
在两个实地赛季 (2016年和2017年) 中,测试了三种P处理材料.
在不同的液压保留时间 (HRT) 下监测了酸盐-和的去除率.

主要成果:

生物反应器表现出一致的NO3-N去除,年平均N去除率为2.84gN m-3 d-1 (2016) 和1.79gN m-3 d-1 (2017).
在2016年,NO3-N负载的减少平均为22.3%,在2017年增加了14.1%.
去除速率因季节和材料而异,平均速率为230毫克P m-3 d-1 (2016) 和21.9毫克P m-3 d-1 (2017).

结论:

经过测试的生物反应器设计为地下排水中的N和P处理提供了一个可行的替代方案.
有效的P去除需要每年更换P吸收介质.
进一步的研究可能会优化P吸收材料和生物反应器配置,以实现持续的性能.

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