| Optimization of operating parameters for sludge process reduction under alternating aerobic/oxygen-limited conditions by response surface methodology. | |
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MedLine Citation:
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PMID: 21906935 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Batch tests were employed to estimate the optimal conditions for excess sludge reduction under an alternating aerobic/oxygen-limited environment using response surface methodology. Three key operating parameters, initial mixed liquor suspended solids (initial MLSS), HRT (hydraulic retention time) and reaction temperature (T), were selected, and their interrelationships studied by the Box-Behnken design. The experimental data and ANOVA analysis showed that the coefficient of determination (R(2)) was 0.9956 and the adjR(2) was 0.9912, which demonstrates that the modified model was significant. The optimum conditions were predicted to give a maximal ΔMLSS yield of 226mg/L at an initial MLSS of 10,021±50mg/L, an HRT of 9.1h and a reaction temperature of 29°C. The prediction was tested by triplicate experiments, where a ΔMLSS yield of 233mg/L was achieved under the chosen optimal conditions. This excellent correlation between the predicted and measured values provides confidence in the model. |
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Authors:
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Shan-Shan Yang; Wan-Qian Guo; Xian-Jiao Zhou; Zhao-Hui Meng; Bo Liu; Nan-Qi Ren |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-8-3 |
Journal Detail:
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Title: Bioresource technology Volume: - ISSN: 1873-2976 ISO Abbreviation: - Publication Date: 2011 Aug |
Date Detail:
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Created Date: 2011-9-12 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9889523 Medline TA: Bioresour Technol Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2011 Elsevier Ltd. All rights reserved. |
Affiliation:
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State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, PR China. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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