Unit of Microbiology, Department of Biology and Geology, CITE II-B, Agrifood Campus of International Excellence ceiA3, CIAIMBITAL, University of Almeria, 04120 Almeria, Spain.
Unit of Microbiology, Department of Biology and Geology, CITE II-B, Agrifood Campus of International Excellence ceiA3, CIAIMBITAL, University of Almeria, 04120 Almeria, Spain.
Bioresour Technol. 2020 Nov;316:123946. doi: 10.1016/j.biortech.2020.123946. Epub 2020 Aug 2.
The agri-food waste (AW) require amendments for composting to adjust nutritional and physicochemical deficiencies. The theoretical mixtures formulation is difficult to reach on an industrial scale. The main objective of this work was to evaluate to what extent the composition of AW-based mixtures determines the quality of the final compost produced at the industrial scale. Raw materials having the same AW share characteristics, irrespectively of the amendments added, but their compost were different. All the materials were biological stable at the cooling phase, and mature enough at the end, although the degree of humification did not match with the absence of phytotoxicity. The final compost had sufficient quality even though the AW-based raw materials have a low C/N ratio (<20) and other characteristics such as high electrical conductivity (13 mS·cm) and pH (<8.5) that are unfavorable for composting. The management operations during industrial composting correct the deficiencies of raw materials.
农业食品废物（AW）需要进行堆肥调整以补充营养和理化缺陷。理论上的混合物配方在工业规模上很难实现。这项工作的主要目的是评估 AW 混合物的组成在多大程度上决定了工业规模生产的最终堆肥的质量。具有相同 AW 特征的原料，无论添加何种添加剂，其组成都不同，但它们的堆肥却不同。所有材料在冷却阶段均具有生物稳定性，最终达到成熟阶段，尽管腐殖化程度与无植物毒性不匹配。尽管基于 AW 的原材料具有低 C/N 比（<20）和其他特性，如高电导率（13 mS·cm）和 pH 值（<8.5），不利于堆肥，但最终堆肥的质量仍然足够好。工业堆肥过程中的管理操作可以纠正原材料的缺陷。
