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Changes in the characteristics of dissolved organic matter during sludge treatment: A critical review
Water Research ( IF 11.4 ) Pub Date : 2020-09-21 , DOI: 10.1016/j.watres.2020.116441
Keke Xiao , Gudrun Abbt-Braun , Harald Horn

Dissolved organic matter (DOM) of sludge is a heterogeneous mixture of high to low molecular weight organic substances which is including proteinaceous compounds, carbohydrates, humic substances, lipids, lignins, organic acids, organic micropollutants and other biological derived substances generated during wastewater treatment. This paper reviews definition, composition, quantification, and transformation of DOM during different sludge treatments, and the complex interplay of DOM with microbial communities. In anaerobic digestion, anaerobic digestion-refractory organic matter, particularly compounds showing polycyclic steroid-like, alkane and aromatic structures can be generated after pretreatment. During dewatering, the DOM fraction of low molecular weight proteins (< 20,000 Dalton) is the key parameter deteriorating sludge dewaterability. During composting, decomposition and polymerization of DOM occur, followed by the formation of humic substances. During landfill treatment, the composition of DOM, particularly humic substances, are related with leachate quality. Finally, suggestions are proposed for a better understanding of the transformation and degradation of DOM during sludge treatment. Future work in sludge studies needs the establishment and implementation of definitions for sample handling and the standardization of DOM methods for analysis, including sample preparation and fractionation, and data integration. A more detailed knowledge of DOM in sludge facilitates the operation and optimization of sludge treatment technologies.



中文翻译:

污泥处理过程中溶解性有机物特征的变化:关键评论

污泥的溶解有机物(DOM)是高至低分子量有机物质的异质混合物,其中包括蛋白质化合物,碳水化合物,腐殖质,脂质,木质素,有机酸,有机微污染物和废水处理过程中产生的其他生物衍生物质。本文回顾了污泥处理过程中DOM的定义,组成,定量和转化,以及DOM与微生物群落之间的复杂相互作用。在厌氧消化中,厌氧消化难处理的有机物,特别是显示出多环类固醇,烷烃和芳族结构的化合物,可以在预处理后生成。在脱水过程中,低分子量蛋白质(<20,000道尔顿)的DOM分数是使污泥脱水能力恶化的关键参数。在堆肥过程中,DOM发生分解和聚合,随后形成腐殖质。在垃圾填埋场处理过程中,DOM的组成(特别是腐殖质)与渗滤液质量有关。最后,提出了一些建议,以更好地了解污泥处理过程中DOM的转化和降解。污泥研究的未来工作需要建立和实施样品处理的定义,以及用于分析的DOM方法(包括样品制备和分离以及数据集成)的标准化。对污泥中DOM的更详细了解有助于污泥处理技术的操作和优化。DOM的组成,特别是腐殖质,与渗滤液质量有关。最后,提出了一些建议,以更好地了解污泥处理过程中DOM的转化和降解。污泥研究的未来工作需要建立和实施样品处理的定义,以及用于分析的DOM方法(包括样品制备和分离以及数据集成)的标准化。对污泥中DOM的更详细了解有助于污泥处理技术的操作和优化。DOM的组成,特别是腐殖质,与渗滤液质量有关。最后,提出了一些建议,以更好地了解污泥处理过程中DOM的转化和降解。污泥研究的未来工作需要建立和实施样品处理的定义,以及用于分析的DOM方法(包括样品制备和分离以及数据集成)的标准化。对污泥中DOM的更详细了解有助于污泥处理技术的操作和优化。污泥研究的未来工作需要建立和实施样品处理的定义,以及用于分析的DOM方法(包括样品制备和分离以及数据集成)的标准化。对污泥中DOM的更详细了解有助于污泥处理技术的操作和优化。污泥研究的未来工作需要建立和实施样品处理的定义,以及用于分析的DOM方法(包括样品制备和分离以及数据集成)的标准化。对污泥中DOM的更详细了解有助于污泥处理技术的操作和优化。

更新日期:2020-09-21
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