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Nitrous oxide generation in denitrifying phosphorus removal process: main causes and control measures.
MedLine Citation:
PMID:  23407928     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Despite the many benefits of denitrifying phosphorus removal process, the significant generation of nitrous oxide (N(2)O), a potent greenhouse gas, remains a problem for this innovative and promising process. To better understand and more effectively control N(2)O generation in denitrifying phosphorus removal process, batch experiments were carried out to investigate the main causes of N(2)O generation, based on which the control measures were subsequently proposed. The results showed that N(2)O generation accounted for 0.41 % of the total nitrogen removal in denitrifying phosphorus removal process, whereas, in contrast, almost no N(2)O was generated in conventional denitrification process. It was further demonstrated that the weak competition of N(2)O reductase for electrons and the high nitrite accumulation were the two main causes for N(2)O generation, evidenced by N(2)O production and reduction rates under different conditions. Accordingly, the reduction of N(2)O generation was successfully achieved via two control measures: (1) the use of continuous nitrate addition reducing N(2)O generation by around 91.4 % and (2) the use of propionate as the carbon source reducing N(2)O generation by around 69.8 %.
Authors:
Cong Li; Jian Zhang; Shuang Liang; Huu Hao Ngo; Wenshan Guo; Yingying Zhang; Yina Zou
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-2-14
Journal Detail:
Title:  Environmental science and pollution research international     Volume:  -     ISSN:  1614-7499     ISO Abbreviation:  Environ Sci Pollut Res Int     Publication Date:  2013 Feb 
Date Detail:
Created Date:  2013-2-14     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9441769     Medline TA:  Environ Sci Pollut Res Int     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan, 250100, Shandong, China.
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