Hydrothermal Carbonization of Sewage Sludge: Analysis of Process Severity and Solid Content,Chemical Engineering & Technology

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Hydrothermal Carbonization of Sewage Sludge: Analysis of Process Severity and Solid Content
Chemical Engineering & Technology ( IF 1.8 ) Pub Date : 2020-08-28 , DOI: 10.1002/ceat.202000095
Andrea Luca Tasca _{1,

2} , Eleonora Stefanelli _{1,

2} , Anna Maria Raspolli Galletti _{2,

3} , Riccardo Gori _{2,

4} , Gemma Mannarino _{2,

4} , Sandra Vitolo _{1,

2} , Monica Puccini _{1,

2}

Affiliation

Hydrothermal carbonization of sewage sludge was carried out with the aim to evaluate the influence of process severity and initial solid content. Response surface methodology was applied to model yield and C yield responses. Enhanced dewaterability performance was recorded under mild processing conditions. The treatment promoted concentration and immobilization of Pb, Cd, Ni, Zn, and Cu. Variation of the solid content showed a stronger influence than severity on average yield and C yield. Higher heating values (HHVs) and energy retention efficiencies (EREs) of hydrochars obtained at the lowest solid content displayed the lowest values. Hence, the energy requirements of a first dewatering step should be compared with the related improvement in terms of HHV and ERE when sludge is used as feedstock.

中文翻译：

污泥的水热碳化：工艺强度和固含量分析

进行污水污泥的水热碳化，目的是评估工艺强度和初始固体含量的影响。将响应面方法应用于模型产量和碳产量响应。在温和的加工条件下记录了增强的脱水性能。该处理促进了Pb，Cd，Ni，Zn和Cu的浓度和固定化。固体含量的变化对平均产率和碳产率显示出比严重程度更大的影响。在最低固含量下获得的碳氢化合物的较高的热值（HHV）和能量保留效率（ERE）显示最低的值。因此，应该将第一步脱水的能量需求与HHV的相关改进进行比较和污泥用作原料时的ERE。

更新日期：2020-08-28

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