Nutrient recovery from swine lagoon water by Spirodela punctata

Spirodela punctata 7776, the best duckweed strain in total protein production selected from in vitro screening experiments with synthetic swine lagoon water medium was examined for N and P recovery. It has shown a capability to grow in and to remove N and P from synthetic swine lagoon water with hig...

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Bibliographic Details
Published in:Bioresource technology 2002, Vol.81 (1), p.81-85
Main Authors: Cheng, Jiayang, Bergmann, Ben A, Classen, John J, Stomp, Anne M, Howard, James W
Format: Article
Language:English
Subjects:
Animals
Biological and medical sciences
Biological treatment of waters
Biotechnology
Duckweed
Environment and pollution
Fundamental and applied biological sciences. Psychology
Industrial applications and implications. Economical aspects
Lemnaceae
Magnoliopsida - physiology
Nitrogen
Nutrient recovery
Phosphorus
Phosphorus - analysis
Phosphorus - metabolism
protein content
Proteins - analysis
Proteins - metabolism
Quaternary Ammonium Compounds - metabolism
screening
Spirodela punctata
Swine
Swine lagoon water
United States
Wastewater
Water Purification - methods
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Summary:Spirodela punctata 7776, the best duckweed strain in total protein production selected from in vitro screening experiments with synthetic swine lagoon water medium was examined for N and P recovery. It has shown a capability to grow in and to remove N and P from synthetic swine lagoon water with high N (240 mg NH 4–N/l) and P (31.0 mg PO 4–P/l) levels. A lag period of approximately 96 h was observed before the duckweed started to grow. During the lag period, utilization of N and P by the duckweed was very slow. The rates of N and P uptake, and duckweed growth increased with the increase of the initial N and P concentrations in the medium. The highest rates of N and P uptakes, and duckweed growth observed in this study were 0.955, 0.129 mg/l-h, and 1.33 g/m 2 -h (or 31.92 g/ m 2 -day ), respectively. The N:P ratio in swine lagoon water is adequate for growing the duckweed.
ISSN:0960-8524
1873-2976
DOI:10.1016/S0960-8524(01)00098-0