| Influences of light and oxygen conditions on photosynthetic bacteria macromolecule degradation: Different metabolic pathways. | |
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MedLine Citation:
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PMID: 21871794 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Direct degradation of macromolecules by photosynthetic bacteria (PSB) is important for the industrial application of PSB wastewater treatment. Light and oxygen are the most important parameters in PSB growth. This paper studied the PSB macromolecule degradation process under three different light and oxygen conditions: light-anaerobic, natural light-microaerobic and dark-aerobic. The results showed that under three different light-oxygen conditions, PSB degradation of macromolecules was higher than 90%; the removal ratios of COD, TN, TP, total sugar and protein were also high; and the biomass yield reached nearly 0.5mg-biomass/mg-COD-removal. Light and oxygen significantly influenced the efficiency. Macromolecules and pollutants removals were higher under oxygen condition than those under light-anaerobic condition. Theoretical analysis showed that under aerobic condition, PSB carried out oxidative phosphorylation, in which pollutants were sufficiently utilized with high mineralization degree. Under light-anaerobic condition, PSB carried out photophosphorylation and fermentation, which led to low pollutants removal efficiency. |
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Authors:
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Haifeng Lu; Guangming Zhang; Tian Wan; Yufeng Lu |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-8-9 |
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: 2011-8-29 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 Environment, Harbin Institute of Technology, Harbin 150090, China. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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