Comparison of dairy wastewater and synthetic medium for biofuels production by microalgae cultivation |
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Authors: | Qing Shu Lei Qin Zhenhong Yuan Shunni Zhu Jin Xu Zhongbin Xu |
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Affiliation: | Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou, China |
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Abstract: | This study is concerned with comparing raw dairy wastewater (DWW) with blue-green medium (BG11 medium) for biofuel production. Three microalgae strains (Chlorella sp., Scenedesmus sp., and Chlorella zofingiensis) were cultured in tubular bubble column photobioreactors with two media separately. After 8 days of cultivation, DWW was demonstrated to be more suitable medium for microalgae biomass and lipid production than BG11 medium. The biomass and lipid produced within wastewater provided suitable feedstocks for anaerobic digestion and biodiesel conversion. Nutrients in wastewater were efficiently removed (>90% total nitrogen removal, approximately 100% ammonia removal, and >85% total phosphorus removal) during this process. |
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Keywords: | Biofuel Chlorella zofingiensis dairy wastewater nutrients removal microalgae |
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