LBE, INRA, Univ Montpellier, 102 avenue des Etangs, 11100 Narbonne, France; Suez, CIRSEE, 38 rue du Président Wilson, 78230 Le Pecq, France.
LBE, INRA, Univ Montpellier, 102 avenue des Etangs, 11100 Narbonne, France.
Bioresour Technol. 2019 Feb;274:180-189. doi: 10.1016/j.biortech.2018.11.090. Epub 2018 Nov 26.
Digestate mechanical separation is present in numerous anaerobic digestion plants. In this study, data from literature and from unpublished analysis were gathered to evaluate digestate separation efficiency for different mechanical separators. For the first time, efficiency indicators allowed the definition of two mass distribution profiles. The low-performance profile was characterized by each component being mainly destined to the liquid fraction, excluding P, Mg and Ca in a few cases. Screw presses represented 68% of these separators and 78% of digestates came from mainly fibrous inputs such as cow manure and silage. In the high-performance profile, digestate compounds were effectively concentrated in the solid fraction, except nitrogen. The great majority of separators were decanting centrifuges, and the anaerobic digestion inputs were principally non-fibrous such as pig slurry, sludge and agro-industrial waste. This study represents a source for benchmarking digestate separation and opens a possibility to forecast more realistically digestate separation performance.
消化渣机械分离在许多厌氧消化厂中都存在。在本研究中，汇集了来自文献和未发表分析的数据，以评估不同机械分离器的消化渣分离效率。这是首次使用效率指标来定义两种质量分布曲线。低性能曲线的特点是每个成分主要都分配到液体部分，在少数情况下排除 P、Mg 和 Ca。螺旋压榨机占这些分离器的 68%，并且 78%的消化渣来自于主要是纤维性的原料，如牛粪和青贮料。在高性能曲线中，除氮外，消化渣化合物有效地集中在固体部分。绝大多数分离器是倾析离心机，厌氧消化的投入物主要是非纤维性的，如猪粪、污泥和农业工业废物。本研究为消化渣分离提供了基准，并为更现实地预测消化渣分离性能开辟了可能性。
