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Cultivation of Chlorella vulgaris in Dairy Wastewater Pretreated by UV Irradiation and Sodium Hypochlorite |
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| Authors: | Lei Qin Qing Shu Zhongming Wang Changhua Shang Shunni Zhu Jingliang Xu Rongqing Li Liandong Zhu Zhenhong Yuan |
| Institution: | 1. Guangzhou Institute of Energy Conversion, Key Laboratory of Renewable Energy, Chinese Academy of Sciences, Guangzhou, 510640, China 2. Jiangsu Key Laboratory for Biomass-based Energy and Enzyme Technology, Huaiyin Normal University, Huai’an, 223300, China 3. Faculty of Technology, University of Vaasa and Vaasa Energy Institute, Vaasa, FI-65101, Finland |
| Abstract: | There is potential in the utilization of microalgae for the purification of wastewater as well as recycling the resource in the wastewater to produce biodiesel. The large-scale cultivation of microalgae requires pretreatment of the wastewater to eliminate bacteria and protozoa. This procedure is costly and complex. In this study, two methods of pretreatment, UV irradiation, and sodium hypochlorite (NaClO), in various doses and concentrations, were tested in the dairy wastewater. Combining the efficiency of biodiesel production, we proposed to treat the dairy wastewater with NaClO in the concentration of 30 ppm. In this condition, The highest biomass productivity and lipid productivity of Chlorella vulgaris reached 0.450 g L?1 day?1 and 51 mg L?1 day?1 after a 4-day cultivation in the dairy wastewater, respectively. |
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