Enhanced nutrient removal and mechanisms study in benthic fauna added surface-flow constructed wetlands: The role of Tubifex tubifex

被引：52
作者：
Kang, Yan [1 ]
Zhang, Jian [1 ]
Xie, Huijun [2 ]
Guo, Zizhang [1 ]
Ngo, Huu Hao [3 ]
Guo, Wenshan [3 ]
Liang, Shuang [1 ]
机构：
[1] Shandong Univ, Sch Environm Sci & Engn, Shandong Key Lab Water Pollut Control & Resource, Jinan 250100, Shandong, Peoples R China
[2] Shandong Univ, Environm Res Inst, Jinan 250100, Peoples R China
[3] Univ Technol Sydney, Sch Civil & Environm Engn, Broadway, Broadway, NSW 2007, Australia
来源：
BIORESOURCE TECHNOLOGY | 2017年 / 224卷
基金：
美国国家科学基金会;
关键词：
Constructed wetlands; Tubifex tubifex; Inorganic nitrogen; Phosphorus transformation; Microbial mechanism; WASTE-WATER; SUSPENDED PARTICLES; PHOSPHORUS REMOVAL; SLUDGE REDUCTION; NITROGEN; REACTOR; COMMUNITY; SEDIMENT; DENITRIFICATION; BIOTURBATION;
D O I：
10.1016/j.biortech.2016.11.035
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
This study designed a combined benthic fauna-T. orientalis-substrate-microbes surface-flow constructed wetlands (SFCWs) through the addition of T. tubifex. Results showed that, the removal efficiencies of nitrogen and phosphorus in the tested SFCWs achieved 81.14 +/- 4.16% and 70.49 +/- 7.60%, which were 22.27% and 27.35% higher than that without T. tubifex. Lower nitrate (2.11 +/- 0.79 mg/L) and ammonium (0.75 +/- 0.64 mg/L) were also observed in the tested SFCWs, which were 3.46 mg/L and 0.52 mg/L lower than that without T. tubifex. Microbial study confirmed the increased denitrifiers with T. tubifex. The lower nitrogen in effluent was also attributed to higher contents of nitrogen storage in sediment and T. orientalis due to the bioturbation of T. tubifex. Furthermore, with T. tubifex, higher proportions of par-ticulate (22.66 +/- 3.96%) and colloidal phosphorus (20.57 +/- 3.39%) observed promoted phosphorus settle-ment and further absorption by T. orientalis. The outcomes of this study provides an ecological and economical strategy for improving the performance of SFCWs. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：157 / 165
页数：9
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