Title of article :
Ammonia removal from anaerobic digestion effluent of livestock waste using green alga Scenedesmus sp.
Author/Authors :
Park، نويسنده , , Jongmin and Jin، نويسنده , , Hai-Feng and Lim، نويسنده , , Byung-Ran and Park، نويسنده , , Ki-Young and Lee، نويسنده , , Kisay، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2010
Pages :
9
From page :
8649
To page :
8657
Abstract :
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 100 ppm NH4–N did not inhibit cell growth, but did decrease final cell density by up to 70% at a concentration of 200–500 ppm NH4–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 NH4+/cell ratio were all necessary for long-term semi-continuous ammonium removal and cell growth.
Keywords :
Microalgae , Semi-continuous operation , Ammonia removal , alkalinity , Anaerobic digestion effluent
Journal title :
Bioresource Technology
Serial Year :
2010
Journal title :
Bioresource Technology
Record number :
1922155
Link To Document :
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