Document Detail

Ammonia removal from anaerobic digestion effluent of livestock waste using green alga Scenedesmus sp.
MedLine Citation:
PMID:  20663665     Owner:  NLM     Status:  MEDLINE    
The green alga Scenedesmus was investigated for its ability to remove nitrogen from anaerobic digestion effluent possessing high ammonium content and alkalinity in addition to its growth characteristics. Nitrate and ammonium were indistinguishable as a nitrogen source when the ammonium concentration was at normal cultivation levels. Ammonium up to 100ppm NH(4)-N did not inhibit cell growth, but did decrease final cell density by up to 70% at a concentration of 200-500ppm NH(4)-N. Inorganic carbon of alkalinity in the form of bicarbonate was consumed rapidly, in turn causing the attenuation of cell growth. Therefore, maintaining a certain level of inorganic carbon is necessary in order to prolong ammonia removal. A moderate degree of aeration was beneficial to ammonia removal, not only due to the stripping of ammonium to ammonia gas but also due to the stripping of oxygen, which is an inhibitor of regular photosynthesis. Magnesium is easily consumed compared to other metallic components and therefore requires periodic supplementation. Maintaining appropriate levels of alkalinity, Mg, aeration along with optimal an initial NH(4)(+)/cell ratio were all necessary for long-term semi-continuous ammonium removal and cell growth.
Jongmin Park; Hai-Feng Jin; Byung-Ran Lim; Ki-Young Park; Kisay Lee
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Bioresource technology     Volume:  101     ISSN:  1873-2976     ISO Abbreviation:  Bioresour. Technol.     Publication Date:  2010 Nov 
Date Detail:
Created Date:  2010-08-02     Completed Date:  2011-01-07     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9889523     Medline TA:  Bioresour Technol     Country:  England    
Other Details:
Languages:  eng     Pagination:  8649-57     Citation Subset:  IM    
Dept. of Environmental Engineering and Biotechnology, Myongji University, Yongin, Republic of Korea.
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MeSH Terms
Agriculture / methods
Ammonia / isolation & purification,  metabolism*
Anaerobiosis / physiology
Biodegradation, Environmental
Industrial Waste / prevention & control*
Scenedesmus / metabolism*
Reg. No./Substance:
0/Industrial Waste; 7664-41-7/Ammonia

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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