Processing of brewing by-products to give food ingredient streams
| Autor: | Charlotte Jacobsen, Preben Bøje Hansen, Matias Falk Bjerregaard, Timothy John Hobley, Angelos Charalampidis, Radhakrishna Shetty, Helena Pastell, Manuel Pinelo, Rasmus Frøding, Shiwen Zhuang |
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| Rok vydání: | 2019 |
| Předmět: |
030309 nutrition & dietetics
Animal feed Fraction (chemistry) Seperation Fractionation Filter press Trub Biochemistry Industrial and Manufacturing Engineering Separation 03 medical and health sciences chemistry.chemical_compound Ingredient 0404 agricultural biotechnology Gallic acid Food science SDG 2 - Zero Hunger 2. Zero hunger 0303 health sciences business.industry Chemistry Pilot scale 04 agricultural and veterinary sciences General Chemistry 040401 food science Filter cake Brewing Brewer's spent grains Brewer’s spent grains business Food Science Biotechnology |
| Zdroj: | Bjerregaard, M F, Charalampidis, A, Frøding, R, Shetty, R, Pastell, H, Jacobsen, C, Zhuang, S, Pinelo, M, Hansen, P B & Hobley, T J 2019, ' Processing of brewing by-products to give food ingredient streams ', European Food Research and Technology, vol. 245, no. 3, pp. 545-558 . https://doi.org/10.1007/s00217-018-03224-6 |
| ISSN: | 1438-2385 1438-2377 |
| DOI: | 10.1007/s00217-018-03224-6 |
| Popis: | Very large amounts of brewer's spent grains (BSG) are produced in the world which is usually considered as a waste, or animal feed, rather than food for humans. Here, we report, for the first time, a new process at pilot scale for the separation of brewer's spent grain and trub to solid and liquid streams that can be used in foods. A new type of continuous rotary drum press was used to process hot BSG to produce a liquid filtrate and a filter cake stream. Analysis showed that of the starting mass of BSG (ca. 120 kg), the liquid filtrate composed 50% of the mass, and the filter cake fraction composed 50% of the mass. The dry weight (DW) content of the BSG increased from 23 to over 35%. This led to concentration of insoluble dietary fibre (from 38 to 54%) and phenolics in the filter cake (from 102 to 150 mg/100 g DW as gallic acid equivalents). No fractionation of soluble species such as proteins occurred. Centrifugation of the filtrate from the rotary drum press led to a clarified supernatant stream and a paste. Concentration of insoluble dietary fibre and phenolics occurred in the paste (from 5 to 14% of DW and 61 to 114 mg/100 g DW as gallic acid equivalents), whereas soluble fibre and protein did not selectively partition. Given that the unit operations used here are scaleable and approved for food production, an industrially feasible route now exists to process brewers spent grains to ingredients. |
| Databáze: | OpenAIRE |
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