The disclosure discloses a compound milk-beer lyophilized fermentation microorganism agent as well as a preparation and application thereof. The microorganism agent comprises a lyophilized microorganism agent of Kluyveromyces marxianus var. marxianus A3 and a lyophilized, microorganism agent of Saccharomyces cerevisiae TR2, wherein the ratio of the viable count of Kluyveromyces marxianus var. marxianus A3 to the viable count of Saccharomyces cerevisiae TR2 in the compound milk-beer lyophilized fermentation microorganism agent is (1.5-2.5):1. The compound fermentation microorganism agent can be applied in production of milk beer, and the product quality and production efficiency of milk beer are improved compared with single strains.

The present invention relates to the unexpected discovery of a new strain of yeast, dubbed GY7B, which is related to, but genetically and phenotypically distinct from, Lachancea thermotolerans. The invention provides methods of brewing sour beer using GY7B, wherein the methods do not require use of lactic acid or lactic acid producing bacteria.

The present invention relates to a new yeast product that is suitable for the production of beer, and uses of this product. The product is a closed container containing 0.1 to 50 l of a frozen yeast product wherein the frozen yeast product contains at least one strain, e.g. one, two or three yeast strains, suitable for beer brewing in a total concentration of at least 10.sup.9 CFU/g, with each yeast strain suitable for beer brewing being present in a concentration of at least 10.sup.8 CFU/g, the frozen yeast product provides a liquid aqueous suspension with a dry matter content below 35% (w/w) upon thawing; and no cryoprotectant is added to the frozen yeast product.

It has unexpectedly been found that a low alcohol or alcohol-free beverage, with a flavor profile very close to a beer of at least 4% (vol/vol) alcohol, can be produced by using Pichia kluyveri yeast strains. In particular, Pichia kluyveri yeast strains only use the glucose in the wort, and have the ability of converting this substrate into a high concentration of specific flavor compounds, which are normally produced by Saccharomyces ssp. yeast strains used for the brewing of beer. In this way the Pichia kluyveri yeast strains can be used to produce either a low alcohol or alcohol-free beverage, depending on the glucose levels in the wort. The main flavor compounds produced by Pichia kluyveri in the fermentation of wort are isoamyl acetate, isoamyl alcohol, ethyl butyrate, ethyl hexanoate and ethyl octanoate.

It has unexpectedly been found that Pichia spp. strains have advantageous properties useful in the beer fermentation process. In particular, Pichia spp. yeast strains can be combined with normal beer yeast strains and different hop varieties in a fermentation process to produce synergistic effectsnamely, the increased production of esters in the fermentation product. More specifically, the yeast can be used to produce increased levels of isoamyl acetate, isobutyl acetate, ethyl propionate, ethyl valerate, ethyl butyrate, ethyl decanoate and ethyl octanoate in beer. In addition, the Pichia spp. strain interacts differently with different hop varieties, so the flavor profile of beer can be tuned by using different combinations of Pichia spp. strains and hops. The present invention relates to a method of brewing beer using a Pichia spp. yeast strain and at least one hop variety, a beer obtainable by such a method and use of a Pichia spp. yeast strain according to the present invention.

The present invention relates to a method for producing a sport beverage, comprising the steps of providing malt and/or unmalted grains, providing mashing liquor produced from spent grains, processing the malt and the mashing liquor to obtain a wort, fermenting the wort by using a yeast and optionally, blending with flavour(s) and/or vitamin(s); and/or adding of sugar(s). The present invention further relates to a sport beverage obtained by said method, wherein said sport beverage is non-alcoholic or has an alcohol content of less than about 1.2 vol-%, preferably less than about 0.5 vol-%. The present invention also relates to the use of the sport beverage before and/or after physical activities.

Described herein are materials and methods for the conversion of a non-volatile form of 3-sulfanyl-1-hexanol (3SH) to free 3SH during a brewing process.

It has unexpectedly been found that a low alcohol or alcohol-free beverage, with a flavor profile very close to a beer of at least 4% (vol/vol) alcohol, can be produced by using Pichia kluyveri yeast strains. In particular, Pichia kluyveri yeast strains only use the glucose in the wort, and have the ability of converting this substrate into a high concentration of specific flavor compounds, which are normally produced by Saccharomyces ssp. yeast strains used for the brewing of beer. In this way the Pichia kluyveri yeast strains can be used to produce either a low alcohol or alcohol-free beverage, depending on the glucose levels in the wort. The main flavor compounds produced by Pichia kluyveri in the fermentation of wort are isoamyl acetate, isoamyl alcohol, ethyl butyrate, ethyl hexanoate and ethyl octanoate.

Provided herein are genetically modified yeast cells that recombinantly expresses a gene encoding a mutant beta-lyase. Also provided are methods of producing fermented products and methods of producing ethanol.

The invention relates to a method for making an alcohol-free beer that is free from coagulated matter, with an alcohol content of not more than 0.5% (v/v), comprising the steps of fermentation of a wort, addition of a hydrolyzed protein after fermentation of the wort and pasteurization. The invention further relates to alcohol-free beer that is free from coagulated matter, with an alcohol content of not more than 0.5% (v/v), which contains one or more hydrolyzed proteins. Preferably the beer also contains maltose and maltotriose and the total content of maltose and maltotriose is between 5 and 80 g/l. The beer has a pleasant taste and can be drunk as a typical beer, wherein in addition it contains the necessary ingredients to promote recovery after sports activities.