Total nitrogen removal in biochar amended non-aerated vertical flow constructed wetlands for secondary wastewater effluent with low C/N ratio: Microbial community structure and dissolved organic carbon release conditions

被引：99
作者：
Ajibade, Fidelis Odedishemi [1 ,2 ,3 ]
Wang, Hong-Cheng [4 ]
Guadie, Awoke [1 ,5 ]
Ajibade, Temitope Fausat [2 ,3 ,6 ]
Fang, Ying-Ke [1 ,2 ]
Sharif, Hafiz Muhammad Adeel [1 ]
Liu, Wen-Zong [4 ]
Wang, Ai-Jie [1 ,4 ]
机构：
[1] Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Environm Biotechnol, Beijing 100085, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[3] Fed Univ Technol Akure, Dept Civil & Environm Engn, PMB 704, Akure, Nigeria
[4] Harbin Inst Technol Shenzhen, Sch Civil & Environm Engn, Shenzhen 518055, Peoples R China
[5] Arba Minch Univ, Coll Nat Sci, Dept Biol, Arba Minch 21, Ethiopia
[6] Chinese Acad Sci, Inst Urban Environm, Key Lab Urban Pollutant Convers, Xiamen 361021, Peoples R China
来源：
BIORESOURCE TECHNOLOGY | 2021年 / 322卷
关键词：
Biochar; Constructed wetland; Dissolved organic carbon; Microbial community; Nitrogen; SUBSURFACE-FLOW; INTERMITTENT AERATION; POPULATION DYNAMICS; TG-FTIR; SURFACE; QUANTIFICATION; IMPROVEMENT; MECHANISMS; PYROLYSIS; SUBSTRATE;
D O I：
10.1016/j.biortech.2020.124430
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
Biochar was utilized to intensify constructed wetland (CW) for further organic and nitrogen removal from secondary wastewater. Four sets of non-aerated biochar amended vertical flow CW (VFCW) were developed to investigate the synergistic effects of biochar and microbes on pollutant removal. Results showed that the average COD and nitrogen removal efficiencies of VFCW1 (with 1% w/w biochar with microbe and plants) achieved 89.1 +/- 5.6% and 90.2 +/- 3.1% respectively, and their corresponding removal rates of 10.2 +/- 0.8 mg-COD/(m(3).d) and 3.57 +/- 0.3 mg-TN/(m(3).d) which were 35 and 52.3% higher than control. The biochar's dissolved organic carbon release in VFCWs indicated that water and acidic media portray the optimum conditions for nitrogen removal. The 168 RNA gene sequencing analysis indicated that in the biochar-amended VFCWs, bacterial phylum Proteobacteria (24.13-51.95%) followed by Chloroftexi (5.64-25.01%), Planctomycetes (8.48-14.43%), Acidobacteria (2.29-11.65%) were abundantly enhanced. Conclusively, incorporating biochar in non-aerated VFCWs is an efficient technique for enhancing nitrogen removal from secondary effluent.
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页数：11
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