Benalia Souraya, Falcone Giacomo, Stillitano Teodora, De Luca Anna Irene, Strano Alfio, Gulisano Giovanni, Zimbalatti Giuseppe, Bernardi Bruno
Dipartimento di Agraria, Università degli Studi Mediterranea di Reggio Calabria, Località Feo di Vito, 89122 Reggio Calabria, Italy.
Foods. 2021 May 10;10(5):1029. doi: 10.3390/foods10051029.
Anaerobic codigestion of olive mill wastewater for renewable energy production constitutes a promising process to overcome management and environmental issues due to their conventional disposal. The present study aims at assessing biogas and biomethane production from olive mill wastewater by performing biochemical methane potential tests. Hence, mixtures containing 0% (blank), 20% and 30% olive mill wastewater, in volume, were experimented on under mesophilic conditions. In addition, life cycle assessment and life cycle costing were performed for sustainability analysis. Particularly, life cycle assessment allowed assessing the potential environmental impact resulting from the tested process, while life cycle costing in conjunction with specific economic indicators allowed performing the economic feasibility analysis. The research highlighted reliable outcomes: higher amounts of biogas (80.22 ± 24.49 NL.kg) and methane (47.68 ± 17.55 NL.kg) were obtained when implementing a higher amount of olive mill wastewater (30%) (/) in the batch reactors. According to life cycle assessment, the biogas ecoprofile was better when using 20% (/) olive mill wastewater. Similarly, the economic results demonstrated the profitability of the process, with better performances when using 20% (/) olive mill wastewater. These findings confirm the advantages from using farm and food industry by-products for the production of renewable energy as well as organic fertilizers, which could be used in situ to enhance farm sustainability.
通过厌氧共消化橄榄果渣废水来生产可再生能源，是解决因其传统处置方式而产生的管理和环境问题的一个很有前景的方法。本研究旨在通过进行生化甲烷潜力测试，评估橄榄果渣废水的沼气和生物甲烷产量。因此，在中温条件下，对体积比分别为0%（空白）、20%和30%的橄榄果渣废水混合物进行了实验。此外，还进行了生命周期评估和生命周期成本核算以进行可持续性分析。具体而言，生命周期评估能够评估测试过程可能产生的环境影响，而生命周期成本核算结合特定经济指标则能够进行经济可行性分析。该研究突出了可靠的结果：在间歇式反应器中使用较高比例（30%）的橄榄果渣废水时，可获得更高产量的沼气（80.22 ± 24.49 NL.kg）和甲烷（47.68 ± 17.55 NL.kg）。根据生命周期评估，使用20%的橄榄果渣废水时，沼气的生态概况更好。同样，经济结果表明该过程具有盈利能力，使用20%的橄榄果渣废水时性能更佳。这些发现证实了利用农业和食品工业副产品生产可再生能源以及有机肥料的优势，这些肥料可就地使用以增强农场的可持续性。
