DiSPAA-Department of Agrifood Production and Environmental Sciences, University of Florence, Piazzale delle Cascine 28, 50144 Florence, Italy.
CREA ABP-Agrobiology and Pedology Research Centre, Piazza M. D'Azeglio 30, Florence, Italy.
J Hazard Mater. 2017 Jul 5;333:144-153. doi: 10.1016/j.jhazmat.2017.03.026. Epub 2017 Mar 19.
Dredged sediments have currently no broad reuse options as compared to other wastes due to their peculiar physico-chemical properties, posing problems for the management of the large volumes of sediments dredged worldwide. In this study we evaluated the performance of sediment (S) co-composted with green waste (GW) as growing medium for ornamental plants. Analysis of the microbial community structure, eco-toxicological tests, were conducted on sediments at 1:1 and 3:1S:GW composting ratios. Sediment-based growing media were then reused to growth the ornamental plant Photina x fraseri in a pilot-scale experiment and plants' physiological and chemical parameters were measured. The results showed that co-composting with green waste increased the diversity of bacteria, fungi and archaea as compared to the untreated sediments, and that both the 1:1 and 3:1 S:GW composted sediments had no substantial eco-toxicological impacts, allowing an excellent plant growth. We concluded that co-composted of sediment with green waste produce a growing medium with suitable properties for growing ornamental plants, and represent a sustainable option for beneficial use of dredged sediments.
与其他废物相比，疏浚沉积物由于其特殊的物理化学性质，目前没有广泛的再利用选择，这给全球大量疏浚沉积物的管理带来了问题。在这项研究中，我们评估了将沉积物（S）与绿废物（GW）共堆肥作为观赏植物生长介质的性能。在 1:1 和 3:1 的 S:GW 堆肥比例下，对沉积物的微生物群落结构和生态毒性测试进行了分析。然后，将基于沉积物的生长介质重新用于观赏植物 Photinia x fraseri 的中试规模实验，并测量了植物的生理和化学参数。结果表明，与未处理的沉积物相比，与绿废物共堆肥增加了细菌、真菌和古菌的多样性，并且 1:1 和 3:1 的 S:GW 共堆肥沉积物没有产生实质性的生态毒性影响，允许植物生长良好。我们得出结论，将沉积物与绿废物共堆肥可产生一种具有适宜观赏植物生长特性的生长介质，是疏浚沉积物的有益利用的可持续选择。
