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题名: Nitrogen and phosphorus transformations and balance in a pond-ditch circulation system for rural polluted water treatment
作者: Ma, Lin1, 2; He, Feng1; Huang, Tao1, 2; Zhou, Qiaohong1; Zhang, Yi1; Wu, Zhenbin1
关键词: Pond-ditch circulation system (PDCS) ; Rural wastewater ; DGGE ; Nitrogen removal ; Phosphorus removal
刊名: ECOLOGICAL ENGINEERING
发表日期: 2016-09-01
DOI: 10.1016/j.ecoleng.2016.05.051
卷: 94, 页:117-126
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ; Life Sciences & Biomedicine ; Technology
类目[WOS]: Ecology ; Engineering, Environmental ; Environmental Sciences
研究领域[WOS]: Environmental Sciences & Ecology ; Engineering
英文摘要: A pond-ditch circulation system (PDCS), which located along the bank of Donghu Lake (Wuchang District, Wuhan, China) and can effectively remove nitrogen and phosphorus, was proved to be a promising solution for the restoration of a degraded rural water environment. However, little is known about the removal process of nitrogen and phosphorus in the PDCS and the contribution of various pathways to nitrogen and phosphorus removal. This study aims to investigate the mechanisms of nitrogen and phosphorus removal for the PDCS. The results showed that (1) for nitrogen removal in the PDCS, it effectively reduced the total nitrogen level within the first 20 days, where dissolved oxygen (DO) played a pivotal role in the process. Based on the mass balance approach, the plant uptake and sediment storage removal contributed to 20.5% of the total nitrogen input removal, whereas other pathways such as N-2 emission accounted for 79.5% of the nitrogen removal. These results indicated that nitrogen removal mainly depended on nitrification and denitrification. Meanwhile, in addition to microbial mechanisms, plant uptake and sediment storage were the major N transformation and removal pathways; in the static system, the pathways for nitrogen removal were similar with those observed in the PDCS system. (2) For phosphorus removal, microorganism processes coupled with plant uptake might be the major methods for phosphorus removal in the PDCS. In the static system, however, the phosphorus removal was mainly attributed to plant uptake. (C) 2016 Elsevier B.V. All rights reserved.
关键词[WOS]: DOMESTIC WASTE-WATER ; FLOW CONSTRUCTED WETLAND ; COMMUNITY STRUCTURE ; ENZYME-ACTIVITIES ; SEWAGE-TREATMENT ; DENITRIFYING BACTERIA ; MICROBIAL-POPULATIONS ; TREATMENT PERFORMANCE ; PHOSPHATASE-ACTIVITY ; NITRATE REDUCTASE
语种: 英语
项目资助者: National Science and Technology Support Program of the 12th Five-Year Plan, China(2012BAJ21B03-04)
WOS记录号: WOS:000381636400016
ISSN号: 0925-8574
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内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/28331
Appears in Collections:水环境工程研究中心_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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