Enhanced nitrogen removal in constructed wetlands: Effects of dissolved oxygen and step-feeding

被引：108
|
作者：
Li, Fengmin [1 ]
Lu, Lun [1 ]
Zheng, Xiang [2 ]
Huu Hao Ngo [3 ]
Liang, Shuang [4 ]
Guo, Wenshan [3 ]
Zhang, Xiuwen [1 ]
机构：
[1] Ocean Univ China, Minist Educ, Key Lab Marine Environm Sci & Ecol, Qingdao 266100, Peoples R China
[2] Renmin Univ China, Sch Environm & Nat Resources, Beijing 100872, Peoples R China
[3] Univ Technol Sydney, Sch Civil & Environm Engn, Broadway, NSW 2007, Australia
[4] Shandong Univ, Sch Environm Sci & Engn, Shandong Key Lab Water Pollut Control & Resource, Jinan 250100, Peoples R China
来源：
BIORESOURCE TECHNOLOGY | 2014年 / 169卷
关键词：
Constructed wetland; Dissolved oxygen; Step-feeding; Nitrification; Denitrification; HORIZONTAL SUBSURFACE FLOW; WASTE-WATER; SPECIES RICHNESS; AERATION; ORGANICS; DENITRIFICATION; EXPERIENCE; STRATEGY; CLIMATE; SYSTEM;
D O I：
10.1016/j.biortech.2014.07.004
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
Four horizontal subsurface flow constructed wetlands (HSFCWs), named HSFCW1 (three-stage, without step-feeding), HSFCW2 (three-stage, with step-feeding), HSFCW3 (five-stage, without step-feeding) and HSFCW4 ( five-stage, with step-feeding) were designed to investigate the effects of dissolved oxygen (DO) and step-feeding on nitrogen removal. High removal of 90.9% COD, 99.1% ammonium nitrogen and 88.1% total nitrogen (TN) were obtained simultaneously in HSFCW4 compared with HSFCW1-3. The excellent TN removal of HSFCW4 was due to artificial aeration provided sufficient DO for nitrification and the favorable anoxic environment created for denitrification. Step-feeding was a crucial factor because it provided sufficient carbon source (high COD: nitrate ratio of 14.3) for the denitrification process. Microbial activities and microbial abundance in HSFCW4 was found to be influenced by DO distribution and step-feeding, and thus improve TN removal. These results suggest that artificial aeration combined with step-feeding could achieve high nitrogen removal in HSFCWs. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：395 / 402
页数：8
相关论文
共 50 条
  • [21] Enhanced nitrogen removal in constructed wetlands with a multistage-A/O process
    Chen, Jieyu
    Wang, Jie
    Wang, Xiaoning
    Lv, Yabing
    Chen, Ruiya
    Xu, Juchen
    Li, Dapeng
    Hou, Jie
    He, Xugang
    ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY, 2023, 9 (10) : 2472 - 2486
  • [22] Effect of step-feeding on the performance of lab-scale columns simulating vertical flow-horizontal flow constructed wetlands
    Verónica Torrijos
    Isabel Ruiz
    Manuel Soto
    Environmental Science and Pollution Research, 2017, 24 : 22649 - 22662
  • [23] Nitrogen removal and nitrous oxide emission from a step-feeding multiple anoxic and aerobic process
    Sun, Yuepeng
    Wang, Huoqing
    Wu, Guangxue
    Guan, Yuntao
    ENVIRONMENTAL TECHNOLOGY, 2018, 39 (07) : 814 - 823
  • [24] Comparative study of two biological nitrogen removal processes: A/O process and step-feeding process
    School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China
    不详
    不详
    J. Southeast Univ. Engl. Ed., 2008, 4 (528-531):
  • [25] Enhanced biological nitrogen removal via dissolved oxygen partitioning and step feeding in a simulated river bioreactor for contaminated source water remediation
    Feng, Li-Juan
    Xu, Jian
    Xu, Xiang-Yang
    Zhu, Liang
    Xu, Jing
    Ding, Wei
    Luan, Jing
    INTERNATIONAL BIODETERIORATION & BIODEGRADATION, 2012, 71 : 72 - 79
  • [26] Effect of step-feeding on the performance of lab-scale columns simulating vertical flow-horizontal flow constructed wetlands
    Torrijos, Veronica
    Ruiz, Isabel
    Soto, Manuel
    ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH, 2017, 24 (28) : 22649 - 22662
  • [27] Hematite-facilitated microbial ammoxidation for enhanced nitrogen removal in constructed wetlands
    Qin, Hao
    Nie, Wenbo
    Yi, Duo
    Yang, Dongxu
    Chen, Mengli
    Liu, Tao
    Chen, Yi
    FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING, 2024, 18 (07)
  • [28] Hematite-facilitated microbial ammoxidation for enhanced nitrogen removal in constructed wetlands
    Hao Qin
    Wenbo Nie
    Duo Yi
    Dongxu Yang
    Mengli Chen
    Tao Liu
    Yi Chen
    Frontiers of Environmental Science & Engineering, 2024, 18
  • [29] Analyzing the Removal Effect of Nitrogen before and after Enhanced Aeration in Constructed Wetlands
    Wang, Hao
    An, Xiaoqing
    Yang, Yang
    Bo, Guozhu
    Zhang, Yaozong
    POLISH JOURNAL OF ENVIRONMENTAL STUDIES, 2016, 25 (05): : 2161 - 2166
  • [30] Comparison of dissolved oxygen distribution and nitrogen removal effect in wetlands with different structures
    Dept. of Municipal Engineering, Southeast University, Nanjing 210096, China
    不详
    Tumu Jianzhu yu Huanjing Gongcheng, 2009, 6 (117-121):
12345