Enhanced removal of nitrate using starch/PCL blends as solid carbon source in a constructed wetland

被引：99
|
作者：
Shen, Zhiqiang [1 ,2 ]
Zhou, Yuexi [1 ,2 ]
Liu, Jia [1 ,2 ,3 ]
Xiao, Yu [1 ,2 ,4 ]
Cao, Rong [3 ]
Wu, Fuping [4 ]
机构：
[1] Chinese Res Inst Environm Sci, State Key Lab Environm Criteria & Risk Assessment, Beijing 100012, Peoples R China
[2] Chinese Res Inst Environm Sci, Res Ctr Water Pollut Control Technol, Beijing 100012, Peoples R China
[3] Hebei Univ Engn, Sch Urban Construct, Handan 056038, Peoples R China
[4] Lanzhou Jiaotong Univ, Sch Environm & Municipal Engn, Lanzhou 730070, Peoples R China
来源：
BIORESOURCE TECHNOLOGY | 2015年 / 175卷
基金：
中国博士后科学基金;
关键词：
Denitrification; Solid carbon source; Starch; Constructed wetland; Microbial community; MICROBIAL PRODUCTS SMP; DENITRIFICATION PERFORMANCE; BIOLOGICAL DENITRIFICATION; BIODEGRADABLE POLYMER; ORGANICS REMOVAL; NITROGEN; EXCITATION; DIVERSITY; SUBSTRATE;
D O I：
10.1016/j.biortech.2014.10.006
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
Cornstarch/polycaprolactone (SPCL) blends were prepared and used as external carbon source for biological denitrification in a constructed wetland. The denitrification performances, components of dissolved organic matter (DOM) and microbial diversity were investigated. The results showed that nitrate was removed mainly in the layer filled with SPCL, and the average denitrification rate was 0.069 kg/m(3) d (nitrate removal efficiency was 98.23%). The major component of DOM was polysaccharides which mainly consisted of reducing sugar. Besides, the concentrations of polysaccharides and reducing sugar decreased along the height of the constructed wetland. Therefore, the dissolved organic carbon (DOC) of effluent decreased to 6.54 mg/L. Denitrifying bacteria Bacillus (24.25%) and Thauera (9.36%) were the most abundant genera in the biofilm attached on the surface of SPCL. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：239 / 244
页数：6
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