Nitrification of human urine for its stabilization and nutrient recycling

Nitrification of human urine performed for its stabilization, and culture of Spirulina platensis in the nitrified human urine were investigated for nutrient recovery. With daily adjusting to pH 8 and keeping high dissolved oxygen concentration, mean 95.0% of NH 4-N in human urine can be finally stab...

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Bibliographic Details
Published in:Bioresource technology 2008-09, Vol.99 (14), p.6299-6304
Main Authors: Feng, Daolun, Wu, Zucheng, Xu, Shihong
Format: Article
Language:English
Subjects:
Biological and medical sciences
Fundamental and applied biological sciences. Psychology
Human urine
Humans
Hydrogen-Ion Concentration
Nitrates - chemistry
Nitrification
Spirulina - growth & development
Spirulina platensis
Urine
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Summary:Nitrification of human urine performed for its stabilization, and culture of Spirulina platensis in the nitrified human urine were investigated for nutrient recovery. With daily adjusting to pH 8 and keeping high dissolved oxygen concentration, mean 95.0% of NH 4-N in human urine can be finally stabilized and oxidized to NO 3-N. Furthermore, this nitrified human urine seems to be an ideal culture medium for S. platensis. Without pH adjustment, only about 50.0% NH 4-N could be converted, i.e. NH 4NO 3 would be formed. Under low dissolved oxygen concentration, mainly short nitrification (from NH 4-N to NO 2-N) occurred.
ISSN:0960-8524
1873-2976
DOI:10.1016/j.biortech.2007.12.007