Nitrogen removal in stormwater bioretention facilities: Effects of drying, temperature and a submerged zone

被引：14
作者：
Soberg, Laila C. [1 ]
Viklander, Maria [1 ]
Blecken, Godecke-Tobias [1 ]
机构：
[1] Lulea Univ Technol, Urban Water, S-97187 Lulea, Sweden
来源：
ECOLOGICAL ENGINEERING | 2021年 / 169卷
基金：
瑞典研究理事会;
关键词：
Stormwater biofilter; Internal water storage; Nitrification and denitrification; Antecedent drying; Cold climate; POLLUTANT REMOVAL; PERFORMANCE; NUTRIENT; NITRIFICATION; WATER; DENITRIFICATION; BIOFILTERS; PHOSPHORUS; HYDROLOGY; QUALITY;
D O I：
10.1016/j.ecoleng.2021.106302
中图分类号：
Q14 [生态学（生物生态学）];
学科分类号：
071012 ; 0713 ;
摘要：
Removal of ammonium-nitrogen (NH4-N), nitrite/nitrate-nitrogen (summarized as NOx-N) and total nitrogen (TN) was examined in pilot-scale bioretention columns with and without a submerged zone under varied temperature and length of antecedent dry periods. The experiment was divided into wet and dry periods and samples were collected to represent continuously wet conditions and conditions with antecedent dry periods. Removal percentages and main effects of the examined factors as well as the effect of their two-way interactions were evaluated. Generally, low temperature favored NOx-N and thus TN removal independent of bioretention column design. Interestingly, bioretention columns with a submerged zone achieved the highest nitrogen removal at low temperature (1.5 degrees C). For standard bioretention columns, outflow concentrations of NOx-N and TN increased with increasing length of antecedent dry period, whereas a submerged zone mitigated this effect.
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页数：8
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