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Optimization of Alkaline Flocculation for Harvesting of Scenedesmus quadricauda #507 and Chaetoceros muelleri #862

Author

Listed:
  • Shuhao Huo

    (School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China
    College of Engineering, China Agricultural University, Beijing 100083, China)

  • Zhongming Wang

    (Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, Guangdong, China)

  • Shunni Zhu

    (Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, Guangdong, China)

  • Fengjie Cui

    (School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China)

  • Bin Zou

    (School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China)

  • Wenhua You

    (School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China)

  • Zhenhong Yuan

    (Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, Guangdong, China)

  • Renjie Dong

    (College of Engineering, China Agricultural University, Beijing 100083, China)

Abstract

A response surface methodology (RSM) was used to evaluate the effects of pH and microalgal biomass concentration (BC) on alkaline flocculating activity for harvesting one freshwater green algae Scenedesmus quadricauda #507 and one marine diatom Chaetoceros muelleri #862. The pH value and BC were in range of 9.0–12.0 and 0.20–2.30 g/L, respectively. Very high regression coefficient between the variables and the response indicates excellent evaluation of experimental data by second-order regressions. Optimum conditions for flocculating activity were estimated as follows: (i) pH 11.6, BC 0.54 g/L for strain #507 and (ii) pH 11.5, BC 0.42 g/L for strain #862. The maximum flocculating activity was around 94.7% and 100%, respectively. Furthermore, the addition of synthetic ocean water (SOW) to the freshwater #507 culture can increase the flocculating activity from 82.13%–88.79% in low algae concentration (0.52 g/L) and 82.92%–95.60% in high concentration (2.66 g/L).

Suggested Citation

  • Shuhao Huo & Zhongming Wang & Shunni Zhu & Fengjie Cui & Bin Zou & Wenhua You & Zhenhong Yuan & Renjie Dong, 2014. "Optimization of Alkaline Flocculation for Harvesting of Scenedesmus quadricauda #507 and Chaetoceros muelleri #862," Energies, MDPI, vol. 7(9), pages 1-10, September.
    • Handle: RePEc:gam:jeners:v:7:y:2014:i:9:p:6186-6195:d:40569
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    References listed on IDEAS

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    1. Shuhao Huo & Renjie Dong & Zhongming Wang & Changle Pang & Zhenhong Yuan & Shunni Zhu & Li Chen, 2011. "Available Resources for Algal Biofuel Development in China," Energies, MDPI, vol. 4(9), pages 1-15, August.
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