| Effects of influent COD/N ratio and internal recycle ratio on nitrogen removal efficiency in the KNR process. | |
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MedLine Citation:
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PMID: 16841751 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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In this study, with the KNR process that has many advantages, the nitrogen removal efficiency of KNR was experimentally investigated at various COD/N ratios of influent conditions. The optimal operating condition of internal recycle ratio was evaluated. The TN removal efficiencies were 59.1, 72.5 and 75.9% at the COD/N ratios of 3, 5 and 7, respectively. These high removal efficiencies resulted from high denitrification rate in UMBR with high microorganism concentration. Furthermore, specific endogenous denitrification at MLVSS of 10.3 g/L that is similar to MLVSS in UMBR was over two times higher than that at MLVSS of 2.06 g/L. This result suggests that endogenous denitrification rate in UMBR is so high that the requirement of an external carbon source can be saved. As the internal recycle ratio increased from 100 to 400%, the TN removal efficiency also improved from 69.5 to 82.9%, and the optimal internal recycle ratio was 300%. |
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Authors:
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C W Suh; S H Lee; H S Jeong; J C Kwon; H S Shin |
Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Water science and technology : a journal of the International Association on Water Pollution Research Volume: 53 ISSN: 0273-1223 ISO Abbreviation: Water Sci. Technol. Publication Date: 2006 |
Date Detail:
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Created Date: 2006-07-17 Completed Date: 2006-10-27 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9879497 Medline TA: Water Sci Technol Country: England |
Other Details:
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Languages: eng Pagination: 265-70 Citation Subset: IM |
Affiliation:
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Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology, Daejeon. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Aerobiosis Anaerobiosis Conservation of Natural Resources* Models, Structural Nitrogen / analysis* Sewage / chemistry Water Pollutants, Chemical / analysis* Water Purification* / instrumentation, methods, standards |
| Chemical | |
Reg. No./Substance:
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0/Sewage; 0/Water Pollutants, Chemical; 7727-37-9/Nitrogen |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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