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Effect of dissolved oxygen and temperature on macromolecular composition and PHB storage of activated sludge

机译:溶解氧和温度对活性污泥大分子组成和PHB存储的影响

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摘要

The macromolecular composition of activated sludge (lipids, intracellular proteins and intracellular polysaccharides) was studied together with its capacity to store macromolecules such as polyhydroxybutyrate (PHB) in a conventional activated sludge system fed with synthetic sewage water at an organic load rate of 1.0 kg COD/(m~3·d), varying the dissolved oxygen (DO) and temperature. Six DO concentrations (0.8, 1.0, 1.5, 2.0, 2.5 and 8 mg/L) were studied at 20℃ with a sludge retention time (SRT) of 6 days. In addition, four temperatures (10℃, 15℃, 20℃ and 30℃) were assessed at constant DO (2 mg/L) with 2 days SRT in a second experimental run. The highest lipid content in the activated sludge was 95.6 mg/g VSS, obtained at 30℃, 2 mg/L of DO and a SRT of 2 days. The highest content of intracellular proteins in the activated sludge was 87.8 mg/g VSS, obtained at 20℃, 8 mg/L of DO and a SRT of 6 days. The highest content of intracellular polysaccharides in the activated sludge was 76.6 mg/g VSS, which was achieved at 20℃, a SRT of 6 days and a wide range of DO. The activated sludge PHB storage was very low for all the conditions studied.
机译:研究了活性污泥的大分子组成(脂质,细胞内蛋白质和细胞内多糖),以及在有机负载率为1.0 kg COD的常规活性污泥系统中,其在常规活性污泥系统中的储存能力,例如聚羟基丁酸酯(PHB)。 /(m〜3·d),改变溶解氧(DO)和温度。在20℃下研究了6种DO浓度(0.8、1.0、1.5、2.0、2.5和8 mg / L),污泥保留时间(SRT)为6天。另外,在第二个实验运行中,以恒定的DO(2 mg / L)和2天的SRT评估了四个温度(10℃,15℃,20℃和30℃)。活性污泥中的最高脂质含量为95.6 mg / g VSS,在30℃,2 mg / L的DO和2天的SRT下获得。活性污泥中细胞内蛋白质的最高含量为87.8 mg / g VSS,在20℃,8 mg / L的DO和6天的SRT下获得。活性污泥中胞内多糖的最高含量为76.6 mg / g VSS,这是在20℃,6天的SRT和宽范围的溶解氧下实现的。在所有研究条件下,活性污泥的PHB储存量都很低。

著录项

  • 来源
    《Journal of Environmental Science and Health》 |2014年第8期|857-862|共6页
  • 作者单位

    Escuela de Ingenieria Bioquimica, Pontificia Universidad Catolica de Valparaiso, Valparaiso, Chile;

    Departamento de Ingenieria Quimica y Ambiental, Universidad Tecnica Federico Santa Maria, Valparaiso, Chile;

    Escuela de Ingenieria Bioquimica, Pontificia Universidad Catolica de Valparaiso, Valparaiso, Chile;

    Escuela de Ingenieria Bioquimica, Pontificia Universidad Catolica de Valparaiso, Valparaiso, Chile;

    Departamento de Ingenieria Quimica, Universidad de Santiago de Chile, Santiago de Chile, Chile;

    Instituto de la Grasa (CSIC), Avda. Padre Garcia Tejero, 4, 41012, Sevilla, Spain;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Activated sludge; dissolved oxygen; macromolecular composition; PHB; temperature;

    机译:活性污泥;溶解氧大分子组成PHB;温度;

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