NOVELTY - Producing a renewable material, comprises: (a) consuming at least a portion of a fermentation feedstock with a fermentation organism to produce a renewable material in fermentation broth, the fermentation feedstock and fermentation broth comprising water; and (b) separating at least a portion of the water from the fermentation feedstock or fermentation broth using one or more phase separations.    USE - The method is useful for producing a renewable material such as biofuel, which are useful as biofuels e.g. petrol, diesel, jet fuel or kerosene, blendstocks, chemicals, intermediates, solvents, adhesives, polymers, and/or lubricants.    ADVANTAGE - The method provides renewable material such as biofuel by utilizing minimal energy.    DETAILED DESCRIPTION - Producing a renewable material, comprises either: (a) consuming at least a portion of a fermentation feedstock with a fermentation organism to produce a renewable material in fermentation broth, the fermentation feedstock and fermentation broth comprising water, and (b) separating at least a portion of the water from the fermentation feedstock or fermentation broth using one or more phase separations; or step (a) as above per se, and (b1) concentrating at least a portion of the renewable material from the fermentation feedstock or fermentation broth using one or more phase separations. INDEPENDENT CLAIMS are included for:    (1) a biofuel component composition comprising a biologically-derived carbohydrate material separated from a quantity of water by fractional freezing methods; and    (2) a system for producing a biofuel, comprising a fermentation vessel adapted to contain a biological organism, a first heat removal device in fluid communication with the fermentation vessel, and adapted to reduce a temperature of a substance to solidify at least one component of the substance, and a solid-liquid separation device in fluid communication with the fermentation vessel and/or the first heat removal device, and adapted to separate a solid portion from a liquid portion.