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首页> 外文期刊>Journal of material cycles and waste management >Self‑recycling of sewage sludge as a coagulant and mechanism in sewage sludge dewatering
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Self‑recycling of sewage sludge as a coagulant and mechanism in sewage sludge dewatering

机译：污水污泥的自我回收作为污泥污泥脱水的凝血剂及机制

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摘要

The properties of sewage sludge-derived biochar (BC) pyrolyzed at 300-900 °C were characterized, and which exhibited the basic properties of coagulant. When 1 g BC500 was added to 100 mL waste-activated sludge (WAS), the maximum mean settlement rate reached 8.20 mL min~(−1) within 10 min, and the volume of the settlement with settling time decreased to 13 mL. The capillary suction time of BC500 (12 s) was superior to those of municipal solid waste incineration (MSWI) fly ash (13.40 s), coal fly ash (14.20 s), and activated carbon (12.20 s). In addition, added BC may reduce the moisture content of sludge cake, especially for BC500. It can be that soluble cations and organic functional groups neutralize the negative charge of WAS which is helpful to shorten settling time. Meanwhile, the pore structure is beneficial for reducing moisture content of sludge cake. As results shown, BC was feasible to improve sewage sludge dewatering used as a coagulant.
机译：在300-900℃下热解的污水污泥衍生的生物炭（BC）的性质表征，并表现出凝结剂的基本性质。当加入100ml废物活性污泥（As）中时，10分钟内最大平均沉降速率达到8.20mL min〜（-1），并且沉降时间的沉降体积降至13毫升。 BC500（12s）的毛细管吸入时间优于城市固体废物焚烧（MSWI）飞灰（13.40秒），煤粉煤灰（14.20秒）和活性炭（12.20秒）。此外，添加的BC可以降低污泥饼的水分含量，特别是对于BC500。可以是可溶性阳离子和有机官能团中和的负电荷有助于缩短沉降时间。同时，孔隙结构有利于降低污泥饼的水分含量。随着结果所示，BC是可行的，可以改善用作凝结剂的污水污泥脱水。

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  • 来源
    《Journal of material cycles and waste management》 |2020年第6期|1867-1876|共10页
  • 作者

    Jiahuan Wu; Tao Lu; Guang Yang; Wei Meng; Haoran Yuan; Yong Chen;

  • 作者单位

    Guangzhou Institute of Energy Conversion Chinese Academy of Sciences Guangzhou 510640 People's Republic of China CAS Key Laboratory of Renewable Energy Guangzhou 510640 People's Republic of China Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development Guangzhou 510640 People's Republic of China University of Chinese Academy of Sciences Beijing 100049 People's Republic of China Shenzhen Gas Corporation Ltd. Shenzhen 518049 People's Republic of China;

    Guangzhou Institute of Energy Conversion Chinese Academy of Sciences Guangzhou 510640 People's Republic of China CAS Key Laboratory of Renewable Energy Guangzhou 510640 People's Republic of China Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development Guangzhou 510640 People's Republic of China;

    Shenzhen Gas Corporation Ltd. Shenzhen 518049 People's Republic of China;

    Shenzhen Gas Corporation Ltd. Shenzhen 518049 People's Republic of China;

    Guangzhou Institute of Energy Conversion Chinese Academy of Sciences Guangzhou 510640 People's Republic of China CAS Key Laboratory of Renewable Energy Guangzhou 510640 People's Republic of China Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development Guangzhou 510640 People's Republic of China;

    Guangzhou Institute of Energy Conversion Chinese Academy of Sciences Guangzhou 510640 People's Republic of China CAS Key Laboratory of Renewable Energy Guangzhou 510640 People's Republic of China Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development Guangzhou 510640 People's Republic of China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Biochar; Characteristics; Coagulant; Pyrolysis; Sewage sludge;

    机译：生物炭;特征;凝血剂;热解;污水污泥;

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