Quality requirements on Barley for beer production Essay Example for Free

Quality requirements on barley for beer production EssayFrom the preceding chapter it should be obvious that quality of the product i. e. Beer has to depend on the quality of the prime raw material i. e. Barley besides the other processing factors. The quality guidelines for barleycorn for beer production are issued by concerned agencies and galore(postnominal) times the brewer itself. These specifications are not universal and vary from one country to other primarily due to changes in malting / brewing practices and to some terminus due to prevailing legislation. Here we will look at the specifications prevalent in Europe and in USA.Accepted malting barley varieties have to modify evenly and produce finished malt whose properties lie within the brewers specifications. The malt quality of a given barley renewing is determined by its genetic oscilloscope and the physical conditions during growth, harvest and storage. Malting quality has to be tested in micro-, pilot- and ind ustrial malting trials, and brewing trials also in pilot and production scale. The quality specifications on barley for production of malt prevalent in Europe are listed below Germination % min. 97% after 3 days Germination index min. 6. 0 Water content 12. 0 %, max. 13. 0 % Protein content 9,0 % and 11,5 % Grading min. 90 % 2. 5 mm. ? -glucan content max. 4 % Micro-organisms below a set level. Pesticide residues according to matter law Ochratoxin according to national law Aflatoxin according to national law Variety purity min. 99 % Before a new barley variety can be accepted for the production of mal, it needs to be gener everyy accepted by farmers for cultivation.The harvested crop must meet the barley specifications, give a malt quality within the actual specifications, and be trouble free in the brew house and fermentation-processes and give a beer quality with good render and taste stability. Varieties are tested in micro-, pilot- and production scale malting an d go through production brewing trials. The preliminary acceptance is dependent on all the test results. Full acceptance is reached when 1000 ton malt has been used in brewing with a high quality commercial brewing performance. close to barley varieties, which are the basis for malt used in Carlsberg products, are Aspen, Alexis, Alfa, Alliot, Amulet, Angora, Ariel, Arapiles, Akcent etc. In USA, the specifications on the barley for malting are issued by American Malting Barley Association (AMBA). The specifications are presented in the table below Barley Factors Two-Row Barley Six-Row Baley Plump Kernel (on 6/64) 90% 80% Thin Kernel (below 5/64) 3% 3% Germination (4 ml 72 hrs GE) 98% 98% Protein 11. 0-13. 0% 11. 5-13.5% Skinned Broken Kernels 5% 5% Malt Factors good Protein 10. 8-12. 8% 11. 3-13. 3% On 7/64 screen 70% 60% Measures of Malt Modification Beta-Glucan (ppm) 100 120 F/C release 1. 2 1. 2 Soluble/Total Protein 40-47% 42-47% Turbidity (NTU) 10 10 Viscosity (absolute cp) 1. 5% 1. 5% Congress Wort Soluble Protein 4. 4-5. 6% 5. 2-5. 7% convey (FG db) 81% 79. 0% Color (% ASBC) 1. 6-2. 2 1. 8-22 FAN 180 190 Malt Enzymes Diastatic Power (% ASBC) 120 140 Alpha Amylase (DU) 45 45.Table 4 Specifications for malt barley as issued by The American Malting Barley Association (AMBA) (ambainc. org) Besides, following general specifications should also be met by the barley (a) It should mature rapidly, get together dormancy quickly without pregermination and germinate uniformly. (b) Hull should be thin, shiny and should adhere well with the plump during harvesting, cleaning and malting. (c) It should exhibit well balanced malting in stuffy malting schedule with four day germination and (d) Malted barley must provide desired beer flavor.