Abstract：
The great interest of modern societies in the reuse of wastes opens up new horizons in the field of wastewater, as well. In particular, the treated sludge resulting from a Wastewater Treatment Plant (WWTP) is dealed with a new perspective in the context of circular economy. The aim of this study is the characterization of its complex matrix, and the evaluation for reuse. Biosolids (BS) collected from four urban WWTPs in the Western region of Greece i.e. Agrinio (AG), Amaliada (AM), Aegio (AE) and Itea (IT). Analytical and spectroscopical methods namely TGA, ICP-OES, Fluorescence, SEM/EDS, XRD, FT-IR and NMR were the means that served this purpose. SEM along with XRD proved the amorphous nature of BS. The dominant metals detected in the samples are: Fe, Zn, Mn, with concentrations which meet the guidelines included in 86/278/EEC Directive. The inorganic load is of great importance, along with their humic acid content, adding value at the samples as fertilizers. BS appeared to be rich in organic matter with long aliphatic chains and numerous functional groups, as capturedin FT-IR spectra. The applied methods form an analytical protocol of the BS mapping, highlighting its potential as a material to be utilized in agriculture.
摘要：
现代社会对废物再利用的极大兴趣为废水领域开辟了新的视野，也是。特别是,在循环经济的背景下，对污水处理厂（WWTP）产生的处理后的污泥进行了新的处理。这项研究的目的是表征其复杂的矩阵，以及重用的评估。从希腊西部地区的四个城市污水处理厂收集的生物固体(BS)，即Agrinio(AG)，Amaliada(AM),Aegio(AE)和Itea(IT)。分析和光谱学方法，即TGA，ICP-OES,荧光,SEM/EDS,XRD,FT-IR和NMR是用于此目的的手段。SEM和XRD证明了BS的无定形性质。样品中检测到的主要金属是：Fe，Zn,Mn,浓度符合86/278/EEC指令中包含的准则。无机负荷是非常重要的，以及它们的腐殖酸含量，增加样品作为肥料的价值。BS似乎富含具有长链脂肪族链和许多官能团的有机物质,作为FT-IR光谱的捕获器。应用的方法形成了BS映射的分析方案，强调其作为农业材料的潜力。
