Journal
JOURNAL OF ENVIRONMENTAL ENGINEERING
Volume 139, Issue 9, Pages 1198-1205Publisher
ASCE-AMER SOC CIVIL ENGINEERS
DOI: 10.1061/(ASCE)EE.1943-7870.0000726
Keywords
Piggery wastewater effluent; Scenedesmus obliquus; Microalga; Nutrient removal; Lipid productivity; Biofuel
Funding
- Korea Institute of Energy Research
- Senior Researchers program (the National Research Foundation of Korea) [2010-0026904]
- Global Research Laboratory Project (Ministry of Education, Science and Technology) [B030305]
- Eco-Innovation project (Global-Top project) of the Korea Ministry of Environment [2012001090001]
- National Research Foundation of Korea [2010-0026904] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Piggery effluent is one of the most highly produced wastewaters throughout the world, containing high levels of inorganic nutrient species. In this study, a microalga Scenedesmus obliquus YSW-14 (S. obliquus) was employed not only for nutrient removal from piggery wastewater effluent but also for lipid accumulation in the algal biomass as a feedstock for biofuel production. The piggery wastewater effluent was diluted up to fivefold with synthetic media to reduce the toxicity of (in)organic components, which resulted in improved microalgal growth, nutrient removal, and lipid productivity. Among the examined culture conditions, a 40% concentration of wastewater effluent was found to be most effective for microalga lipid productivity (). S. obliquus removed 155mg total nitrogen and 4mg total phosphate per gram of dried algae for growth at the same dilution condition. These results demonstrate the feasibility of using microalgae for advanced wastewater treatment and subsequent production of lipids as biofuel feedstock.
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