E-resources
Peer reviewed
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Pereira, T.D.S.; Catenacci, A.; Guerreschi, A.; Bellandi, G.; Malpei, F.
The Science of the total environment, 07/2022, Volume: 830Journal Article
The use of ornamental flowers and plants is widespread in several regions of the world, but the management of flower (or floral) waste (FW), classified as herbaceous biomasses, is scarcely addressed in the literature. However, climate change, population growth and the depletion of resources are expected to push towards the development of FW management strategies, according to principles of flexibility and integration of technologies. This study focuses on the characterization of ten different varieties of flowering plants, of which the wastes are of concern in the Pistoia Province (Italy). The possibility of recovering energy by means of anaerobic digestion is also preliminarily investigated. The interpretation of data through Principal Component Analyses proved to be effective to orientate the selection of technological solutions. The three main parts of each plant variety were analysed separately, showing that the biochemical composition of stems is statistically different from that of leaves and flowers, thus suggesting the viability of adopting different strategies to optimize material (value-added products) recovery from FW. Conversely, regarding biogas generation and energy recovery, the methane yield (in the range 82–330 NmLCH4.gVS−1) is not significantly affected by the type of FW part, nor by the variety of flowering plant or by the use of pesticides during cultivation, whereas lower kinetics were observed for stems compared to leaves and flowers. In view of full-scale application, and depending on FW amounts locally produced, a careful evaluation is required, encompassing aspects of technical feasibility and economic expenses associated with FW parts separation. Display omitted •The management of flower waste is scarcely addressed in the literature.•Principal Component Analysis as practical tool to orientate flower waste management•Stems are different from flowers or leaves as for biochemical composition.•Stems, flowers and leaves are statistically the same as for anaerobic degradability.•Separating stems from flowers/leaves in case of target-oriented resource recovery
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