Università degli Studi Mediterranea di Reggio Calabria, Dipartimento di Ingegneria Civile, dell'Energia dell'Ambiente e dei Materiali, via Graziella, loc. Feo di Vito, 89122 Reggio Calabria, Italy.
Università degli Studi Mediterranea di Reggio Calabria, Dipartimento di Ingegneria Civile, dell'Energia dell'Ambiente e dei Materiali, via Graziella, loc. Feo di Vito, 89122 Reggio Calabria, Italy.
J Environ Manage. 2018 Apr 15;212:462-468. doi: 10.1016/j.jenvman.2018.02.039. Epub 2018 Feb 22.
The processing of oranges is a major industry worldwide and leads to the production of large amounts of orange peel waste (OPW). Energy production through anaerobic digestion of OPW is a promising option; however, the high content of essential oil, mainly composed of d-limonene, a well-known antioxidant, can cause the inhibition of the biological activity. In this paper, different pretreatment methods were tested (e.g. ensiling, aeration, thermal and alkaline treatments) to optimize the anaerobic digestion of OPW focusing on d-limonene removal. The raw and pretreated substrates were characterized and their biochemical methane production was measured. The results demonstrated the ability of some of the treatments to reduce d-limonene content up to 80%. A relatively high biomethane potential production of OPW (up to about 500 NmL CH gVS) was measured. The importance of the acclimation of inoculum and the risk connected to the accumulation of inhibiting substances in the reactor is discussed.
橙子加工是全球的一个主要产业，会产生大量的橙皮废料（OPW）。通过厌氧消化 OPW 来生产能源是一种很有前途的选择；然而，其中所含的大量精油，主要由众所周知的抗氧化剂 d-苎烯组成，会抑制生物活性。在本文中，测试了不同的预处理方法（例如青贮、曝气、热和碱处理），以优化 OPW 的厌氧消化，重点是去除 d-苎烯。对原始和预处理的基质进行了特性分析，并测量了它们的生化甲烷产量。结果表明，一些处理方法能够将 d-苎烯的含量降低到 80%左右。还测量了 OPW 相当高的生物甲烷潜力（高达约 500 NmL CH/gVS）。讨论了接种物驯化的重要性，以及在反应器中积累抑制物质的风险。
