Optimizing Cultivation Strategies for Robust Algal Growth and Consequent Removal of Inorganic Nutrients in Pretreated Livestock Effluent

Dilution was employed as a pretreatment strategy to increase light transmittance and decrease ammonia toxicity in piggery effluent prior to the cultivation of microalgae. The dilution effect was quantitatively determined based on both the maximum specific nutrient consumption rate and the maximum gr...

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Bibliographic Details
Published in:Applied biochemistry and biotechnology 2014-10, Vol.174 (4), p.1668-1682
Main Authors: Kim, Hyun-Chul, Choi, Wook Jin, Ryu, Jun Hee, Maeng, Sung Kyu, Kim, Han Soo, Lee, Byung-Chan, Song, Kyung Guen
Format: Article
Language:English
Subjects:
Algae
Algal growth
ammonia
Animal wastes
Animals
Biochemistry
Biological and medical sciences
Biomass
biomass production
Bioremediation
Biotechnology
Chemistry
Chemistry and Materials Science
Cultivation
Effluents
Fundamental and applied biological sciences. Psychology
harvesting
Livestock
Medical Waste Disposal - methods
Microalgae
Microalgae - growth & development
nitrogen content
Nutrient removal
Nutrients
Scenedesmus - growth & development
Scenedesmus quadricauda
Toxicity
transmittance
Waste Water - microbiology
wastewater
Water Purification
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Summary:Dilution was employed as a pretreatment strategy to increase light transmittance and decrease ammonia toxicity in piggery effluent prior to the cultivation of microalgae. The dilution effect was quantitatively determined based on both the maximum specific nutrient consumption rate and the maximum growth coefficient to minimize the usage of diluent. The biomass productivity of microalgae was also evaluated to select the best species among the five different candidates examined. A 20-fold dilution of piggery wastewater resulted in decreased chromaticity (584 mg Pt-Co L⁻¹) and total nitrogen (76 mg L⁻¹), on which the microalgae cultivation was more effective for an algal growth compared to the other dilution factors. If the initial cell concentration of Scenedesmus quadricauda increased, the production of biomass tended to improve. Robust growth and harvesting of S. quadricauda were achieved, and the associated consistent removal of inorganic nutrients was accomplished during the semi-continuous cultivation of the best species.
ISSN:0273-2289
1559-0291
DOI:10.1007/s12010-014-1145-2