Organic carbon quantity and quality jointly triggered the switch between dissimilatory nitrate reduction to ammonium (DNRA) and denitrification in biofilters

被引：21
作者：
Sun, Feng [1 ]
Deng, Qinghui [2 ,3 ]
Li, Xiaowen [2 ,3 ]
Tang, Mengjuan [4 ]
Ma, Xufa [1 ]
Cao, Xiuyun [2 ]
Zhou, Yiyong [2 ]
Song, Chunlei [2 ]
机构：
[1] Huazhong Agr Univ, Coll Fisheries, Wuhan 430070, Peoples R China
[2] Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Key Lab Algal Biol, Wuhan 430072, Peoples R China
[3] Univ Chinese Acad Sci, Beijing 100039, Peoples R China
[4] Anhui Univ, Hefei 230601, Peoples R China
来源：
CHEMOSPHERE | 2021年 / 280卷
基金：
中国国家自然科学基金;
关键词：
Dissimilatory nitrate reduction to ammonium (DNRA); Denitrification; Organic carbon; Nitrogen removal; Biofilters; STORMWATER BIOFILTERS; PHOSPHORUS REMOVAL; NITROGEN REMOVAL; SEDIMENTS; ENRICHMENT; PATHWAYS; NUTRIENT; RUNOFF; MATTER;
D O I：
10.1016/j.chemosphere.2021.130917
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The effect of organic carbon (OC) quality and quantity on switch between dissimilatory nitrate reduction to ammonium (DNRA) and denitrification (DEN) was studied in biofilter systems. High OC in matrix could promote significantly nitrate (NO3--N) removal due to the reinforce of DEN. Sodium acetate (SA) addition in influent further fueled NO3--N removal in groups with low OC in matrix but increased ammonium (NH4+-N) and nitrite (NO3--N) accumulation in groups with high OC in matrix. This indicated that high OC combined different species, facilitated the DNRA over DEN. Compared to bagasse, corncob was the better suitable OC source in matrix for DEN due to slow and continuous release of OC. Hence, in order to promote NO3--N removal and decline NH4+-N accumulation in biofilters, it is very important to screen suitable OC source (mixed utilization of multiple C sources is recommended) and regulate its dosage (below 80 mg L-1).
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页数：9
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