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首页> 外文期刊>The Science of the Total Environment >Flocculation of Chlorella vulgaris by shell waste-derived bioflocculants for biodiesel production: Process optimization, characterization and kinetic studies
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Flocculation of Chlorella vulgaris by shell waste-derived bioflocculants for biodiesel production: Process optimization, characterization and kinetic studies

机译：壳废衍生生物絮凝剂对小球藻的絮凝作用，用于生物柴油生产：工艺优化，表征和动力学研究

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摘要

Flocculants are foreign particles that aggregate suspended microalgae cells and due to cost factor and toxicity, harvesting of microalgae biomass has shifted towards the use of bioflocculants. In this study, mild acid-extracted bioflocculants from waste chicken's eggshell and clam shell were used to harvest Chlorella vulgaris that was cultivated using chicken compost as nutrient source. It was found that a maximum of 99% flocculation efficiency can be attained at pH medium of 9.8 using 60 mg/L of hydrochloric acid-extracted chicken's eggshell bioflocculant at 50 degrees C of reaction temperature. On the other hand, 80 mg/L of hydrochloric acid-extracted clam shell bioflocculant was sufficient to recover C. vulgaris biomass at pH 9.8 and optimum temperature of 40 degrees C. The bioflocculants and bioflocs were characterized using microscopic, zeta potential, XRD, AAS and FT-IR analysis. The result revealed that calcium ions in the bioflocculants are the main contributor towards the flocculation of C. vulgaris, employing charge neutralization and sweeping as possible flocculation mechanisms. The kinetic parameters were best fitted pseudo-second order which resulted in Fe of 0.99 under optimal flocculation temperature. The results Kinetic herein, disclosed the applicability of shell waste-derived bioflocculants for up-scaled microalgae harvest-Biodieseling for biodiesel production. (C) 2019 Elsevier B.V. All rights reserved.
机译：絮凝剂是聚集悬浮的微藻细胞的外来颗粒，由于成本因素和毒性，微藻生物质的收获已转向使用生物絮凝剂。在这项研究中，从废鸡的蛋壳和蛤壳中提取的温和的酸性生物絮凝剂用于收获小球藻，而小球藻是以鸡的堆肥为营养源培养的。发现在60℃的反应温度下，使用60mg / L的盐酸提取的鸡的蛋壳生物絮凝剂，在pH为9.8的条件下，絮凝效率最高可达到99％。另一方面，用盐酸提取的蛤壳生物絮凝剂80 mg / L足以回收pH 9.8和40摄氏度的最佳温度下的寻常梭状芽胞生物量。使用微观的zeta电位，XRD， AAS和FT-IR分析。结果表明，生物絮凝剂中的钙离子是寻常念珠菌絮凝的主要贡献者，它采用电荷中和和扫除作为可能的絮凝机理。在最佳絮凝温度下，动力学参数最佳拟合拟二阶，其Fe为0.99。本文的动力学结果公开了壳废物衍生的生物絮凝剂在大规模微藻收获中的适用性-生物柴油用于生物柴油生产。 （C）2019 Elsevier B.V.保留所有权利。

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  • 来源
    《The Science of the Total Environment》 |2020年第1期|134995.1-134995.13|共13页
  • 作者

    Suparmaniam Uganeeswary; Lam Man Kee; Uemura Yoshimitsu; Shuit Siew Hoong; Lim Jun Wei; Show Pau Loke; Lee Keat Teong; Matsumura Yukihiko; Le Phung Thi Kim;

  • 作者单位

    Univ Teknol PETRONAS Chem Engn Dept Seri Iskandar 32610 Perak Malaysia|Univ Teknol PETRONAS Inst Self Sustainable Bldg Ctr Biofuel & Biochem Res Seri Iskandar 32610 Perak Malaysia;

    Univ Tunku Abdul Rahman Lee Kong Chian Fac Engn & Sci Dept Chem Engn Sungai Long 43000 Selangor Malaysia;

    Univ Teknol PETRONAS Inst Self Sustainable Bldg Ctr Biofuel & Biochem Res Seri Iskandar 32610 Perak Malaysia|Univ Teknol PETRONAS Fundamental & Appl Sci Dept Seri Iskandar 32610 Perak Malaysia;

    Univ Nottingham Malaysia Fac Sci & Engn Dept Chem & Environm Engn Jalan Broga Semenyih 43500 Selangor Malaysia;

    Univ Sains Malaysia Sch Chem Engn Engn Campus Nibong Tebal Pulau Pinang Malaysia;

    Hiroshima Univ Dept Mech Sci & Engn Higashihiroshima Japan;

    Ho Chi Minh City Univ Technol Ho Chi Minh City VNU HCM Fac Chem Engn Dept Chem Proc Engn & Equipment 268 Ly Thuong Kiet St Dist 10 Hcmc Vietnam;

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  • 正文语种 eng
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  • 关键词

    Microalgae; Harvesting; Bioflocculant; Flocculation; Kinetic; Biodiesel;

    机译：微藻;收获;生物絮凝剂絮凝;动能生物柴油;

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