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首页> 外文期刊>Waste Management >Fate of heavy metals and polycyclic aromatic hydrocarbons (PAH) in sewage sludge carbonisates and ashes - A risk assessment to a thermochemical phosphorus-recycling process
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Fate of heavy metals and polycyclic aromatic hydrocarbons (PAH) in sewage sludge carbonisates and ashes - A risk assessment to a thermochemical phosphorus-recycling process

机译：污泥碳酸盐和灰烬中重金属和多环芳烃（PAH）的命运-热化学磷回收工艺的风险评估

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摘要

In the near future, phosphorus (P) recycling will gain importance in terms of decreasing primary resources. Sewage sludge (SSL) is an adequate secondary P-resource for P-fertilizer production but it is also a sink for heavy metals and organic pollutants. The present study is an investigation on thermochemical P-recycling of SSL. Various temperatures and amendments were tested regarding their performance to remove heavy metals and polycyclic aromatic hydrocarbons (PAH) and simultaneous increase of the plant-availability of P. The investigations were carried out on two types of SSL originating from wastewater treatment plants with chemical P-precipitation and enhanced biological P-removal, respectively. The results show that thermochemical treatment with chlorine donors is suitable to remove the majority of heavy metals and that a combination of a gaseous chlorine donor (HCl) and sodium additives leads to both high heavy metal removal and high plant availability of P. Furthermore, plant experiments show that almost all investigated thermochemical treatments can significantly reduce the bioavailability and plant uptake of heavy metals. Furthermore, PAHs are secondarily formed during low-temperature treatments (400-500 degrees C), but can be significantly reduced by using sodium carbonate as an additive. (C) 2018 Elsevier Ltd. All rights reserved.
机译：在不远的将来，就减少一次资源而言，磷（P）的回收将变得越来越重要。污水污泥（SSL）是生产P肥料的适当二级P资源，但它也是重金属和有机污染物的汇。本研究是对SSL的热化学P回收的研究。测试了各种温度和修正值，以评估其去除重金属和多环芳烃（PAH）的性能以及同时提高P的工厂利用率的情况。对源自化学处理P-废水的两类SSL进行了研究。沉淀和增强的生物除磷效果。结果表明，用氯供体进行热化学处理适合去除大部分重金属，并且气态氯供体（HCl）和钠添加剂的组合可导致高重金属去除率和P的高植物利用率。实验表明，几乎所有研究的热化学处理都可以显着降低重金属的生物利用度和植物吸收。此外，PAHs是在低温处理（400-500摄氏度）期间二次形成的，但可以通过使用碳酸钠作为添加剂来显着降低。 （C）2018 Elsevier Ltd.保留所有权利。

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  • 来源
    《Waste Management》 |2018年第8期|576-587|共12页
  • 作者

    Steckenmesser Daniel; Vogel Christian; Boehm Leonard; Heyde Benjamin; Adam Christian;

  • 作者单位

    Justus Liebig Univ Giessen, Res Ctr BioSyst Land Use & Nutr iFZ, Inst Plant Nutr, Heinrich Buff Ring 26-32, D-35392 Giessen, Germany;

    Bundesanstalt Mat Forsch & Prufung BAM, Div Thermochem Residues Treatment & Resource Reco, Unter Eichen 87, D-12205 Berlin, Germany;

    Justus Liebig Univ Giessen, Inst Soil Sci & Soil Conservat, Res Ctr BioSyst Land Use & Nutr iFZ, Heinrich Buff Ring 26-32, D-35392 Giessen, Germany;

    Justus Liebig Univ Giessen, Inst Soil Sci & Soil Conservat, Res Ctr BioSyst Land Use & Nutr iFZ, Heinrich Buff Ring 26-32, D-35392 Giessen, Germany;

    Bundesanstalt Mat Forsch & Prufung BAM, Div Thermochem Residues Treatment & Resource Reco, Unter Eichen 87, D-12205 Berlin, Germany;

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

    P-recycling; Sewage sludge; Thermochemical treatment; Heavy metals; Poly aromatic hydrocarbons;

    机译：磷回收;污水污泥;热化学处理;重金属;多芳烃;

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