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.
Waste Manag. 2019 Mar 1;86:67-79. doi: 10.1016/j.wasman.2019.01.032. Epub 2019 Jan 28.
Defined as the residue from anaerobic digestion (AD), digestate refers to a set of materials with varied biochemical compositions. The objective of this study was to establish a digestate typology according to its fertilizing-value with data from literature and internal unpublished databases. To establish a relatively big database allowing the application of advanced statistics, usual fertilizing-value parameters were used: dry matter, volatile solids, C/N, C/Organic-N, total N (TN), total ammoniacal nitrogen (TAN), TAN/TN, total P and total K. Statistical analysis was performed on a dataset of 91 raw digestates, 34 solid fractions and 25 liquid fractions after separation. The resulting typology outlined that fertilizing-values are linked to AD feedstock and process. As case study regulations, no digestate (without any post-treatment) fulfilled French standards and the latest European Union regulation proposal on fertilizers. Options to reach regulations' product categories were discussed according to the typology. For the first time, a digestate typology was established based on fertilizing value, which can be a useful tool enhancing digestate management and policy making.
定义为厌氧消化（AD）的残留物，消化物是指一组具有不同生化组成的物质。本研究的目的是根据文献和内部未发表数据库中的数据，根据其施肥价值建立一种消化物分类法。为了建立一个相对较大的数据库，允许应用先进的统计方法，使用了常用的施肥价值参数：干物质、挥发性固体、C/N、C/有机-N、总氮（TN）、总氨氮（TAN）、TAN/TN、总磷和总钾。对 91 个原始消化物、34 个固体部分和分离后的 25 个液体部分的数据集进行了统计分析。结果表明，施肥价值与 AD 原料和工艺有关。作为案例研究法规，未经任何后处理的消化物（无任何后处理）均不符合法国标准和欧盟最新的肥料法规提案。根据分类法讨论了达到法规产品类别的选择方案。这是首次根据施肥价值建立消化物分类法，这可能是增强消化物管理和决策的有用工具。
