Estudo do potencial biotecnológico do rizoma de Zingiber zerumbet L. Smith como adjunto na produção de cerveja artesanal

Abstract

The production of craft beer has become something in constant growth in the recent years in Brazil. This study bring as objective to evaluate the biotechnological potential from the utilization of the Zingiber zerumbet´s rhizome, The bitter ginger, as adjunct in craft beer production. The experiment consisted on elaboration of a craft beer of low fermentation, adding Z. zerumbet` rhizome extract and essential oil. The beer was rated into several criteria, including bioprocess response , microbiological analysis and sensorial characterization. The rhizomes show characteristics that allow his utilization as adjunct in the beer production process, With a high rate of carbohydrates of 75,79 g/100g and low lipids rate from 4,65 g/100g. In relation at the physical and chemical qualities it was found the following attributes: color of 10,03 EBC, bitter of 39,20 BU, carbonic gas (CO2) of 0,38 % p/p, pH of 4,63, turbidity of 2,67,diketones of 0,31 mg.L-1, alcoholic content was 4,96% v/v and 0,53 mUA from zerumbona what proves that the compound was preserved until the bottle phase of the final good, in additional it has increased the bitter of the beverage in about 2,4 BU. In relation at response variations of the bioprocess it showed yield of cells (YX/S) de 0,322 g.g-1 and fermenting efficiency (EF) of 88,45%.The microbiological results has showed that the pasteurization process has eliminated all the microorganisms that appeared on the process. The beer presents scents from the ginger. Mild astringency, moderate bitter and it remains lightly at tongue in the end. color dark yellow, low level of foam , and light turbidity as common characteristic from craft beer. The results allow to conclude that the bitter ginger has provided increase of the bitter , and probably can present nultracelticals and pharmacological characteristics.