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在无化木片生物反应器中阐明去除动态

Gimhani N Perera¹, Dorisel Torres Rojas², Aldrin Rivas³

¹Environmental Research Institute, School of Science, Faculty of Science and Engineering, University of Waikato, Kirikirioa Hamilton, New Zealand; National Institute of Water and Atmospheric Research Ltd (NIWA), PO Box 11115, Kirikirioa Hamilton 3251, New Zealand.

The Science of the total environment

|February 1, 2024

概括

在脱木片生物反应器 (DBR) 中的铁氧化还原循环解释了的去除. 铁循环控制的动态,根据铁的可用性和反应堆条件,作为源或沉.

科学领域:

环境工程环境工程
水质管理水质管理
生物地质化学生物地质化学

背景情况:

无化木片生物反应器 (DBR) 对酸盐的去除非常有效.
在DBR中去除 (P) 是不一致的,不清楚的机制.
铁 (Fe) 反氧循环被假定会影响DBR中的P动态.

研究的目的:

调查Fe氧化还原循环在DBRs中的P动态中的作用.
确定Fe循环是否解释了现场试验中观察到的变量P源-沉行为.
量化P去除速率及其与Fe循环和反应堆条件的关系.

主要方法:

在新西兰阿托亚罗亚州,监测两个排水季的试点规模的DBR.
在现场测量减少和氧化溶液 (Fe,S,P,酸盐).
对氧化还原梯度的热力学分析和P去除速率的计算.

主要成果:

铁氧化还原循环紧紧跟着O2,酸盐和MnO2的减少,在硫酸盐的减少之前.
观察到Fe和P之间的紧密合 (输入R2为0.94,输出R2为0.85).
DBR在第一季 (高Fe2+) 充当了P源,在第二季 (下降Fe2+) 充当了P沉.

结论:

铁氧还氧循环是解释DBR中的P动态和源-沉行为的关键机制.
清除P的效率取决于P的可用性和液压保留效率.
在DBR中微生物学P去除可能是显著的,与酸盐去除相当.

关键词:

生物地质化学循环是什么生物吸收生物吸收无化木片生物反应器的生物反应器是一种的物质.

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