How to make rice malt syrup ?|FAQ

How to make rice malt syrup ?

2018-09-20 /

Malt syrup is produced by hydrolysis of starch. What is different from glucose syrup is that in the malt syrup maltose is the main content. The process of how to make rice malt syrup is similar to glucose making, only different is the application of different enzymes.

Brief introduction of how to make rice malt syrup:
Break rice into powder, and then add certain water to make slurry concentration around 18Be. The pH value is adjusted to pH 5.0~pH7.0 with Na2CO3, and finally add the high temperature resistant α-amylase. After the material is evenly stirred, pump the slurry into the jet cooker. In the jet cooking process, the slurry meet with hot steam directly, with discharge temperature controlled at 110-115 ° C. The liquid from the ejector enters to laminar tank for heat preservation, with temperature maintained at 95-97 °C for 60 minutes to 90 minutes. Then, the second injection is performed, and the liquid and the steam directly meet in the second ejector, the temperature is raised to above 120-145 ° C, and the high temperature resistant α-amylase is completely killed at the high temperature for 3-5 minutes.

Rice malt syrup production process

For how to make rice malt syrup, the starch will be further dispersed and the protein will solidify further. Then the feed liquid enters the vacuum flash cooling system to cool down to 55 ° C to keep warm, while reducing the PH value to 4.5-6.5, adding saccharification enzyme. When saccharification is proceed to the end point, the feed liquid is sprayed and heated to kill the enzyme. Following filter press will be used to remove solid protein, then add activated carbon for half an hour to decolorize syrup. To make high quality malt syrup, 2nd decolorization process will be performed. After that, ion exchange is used to remove inorganic ion impurities. Then separated sugar liquid from ion exchange process is concentrated to 75% by a five-effect evaporator to meet the product requirements in the process of how to make rice malt syrup.

Malt syrup production plant

Technical requirements of rice malt syrup production:
(1) Slurry mixing process of how to make rice malt syrup:
Slurry concentration: 17Be
PH: 5.5-6.2
High temperature resistant α-amylase: 0.4-1.0 L/t
(2) Liquefaction process of how to make rice malt syrup:
First, the injector and the laminar flow tank are preheated to 100 ° C, and jet cooking process is carried out. The temperature in the injector is controlled at 100 ° C - 115 ° C, and the temperature in the laminar flow tank is controlled at 95 ° C - 97 ° C.
High-temperature processing: By the second jet cooking, the feed liquid is heated to 110 ° C - 145 ° C, maintained by the high temperature maintenance tank for 5 - 10 minutes. And the heat treatment above 110 ° C - 145 ° C can achieve three purposes: (a) inactivated enzyme (b) protein solidification (c) dispersion of insoluble starch particles.

Ion exchange column

Vacuum flash cooling: By the effect of vacuum flash cooling system, temperature is reduced from 110 ° C - 145 ° C to 70 ° C - 90 ° C.
2nd high-temperature treatment: The feed liquid is heated by the third jet cooker to 110 ° C - 145 ° C, maintained by the high temperature maintenance tank for 5 - 10 minutes, and the heat treatment above 110 ° C - 145 ° C can achieve three purposes: (a) inactivated enzyme (b) protein coagulation (c) insoluble starch granules dispersed.
2nd vacuum flash cooling: By the effect of vacuum flash cooling system, temperature is reduced from 110 ° C - 145 ° C to 70 ° C - 90 ° C. And adjust PH value at 4.8-5.0.
(3) Residue filtration sequences of how to make rice malt syrup:
a. Before filtration, feed liquid should be cooled to 70℃.
b.The filter press is used simultaneously during filtration.
c. There are two sets of filter cloth to reduce filtration and sugar storage time.
d. The filtration pressure flow line is increased by adjusting the reflux during filtration.
e. In order to reduce suspended solids in the filtrate and shorten the filtration time, the filtration pressure should not exceed 0.4 MPa.

Rice malt syrup production equipment

f. When the filtration is difficult to proceed, air can be passed to dredge the filter residue.
g. In order to prevent the deterioration of the sugar liquid, the saccharification tank should be cleaned after the saccharification liquid has passed, and the washing liquid should be also filtered by a pump.
h. After the filtration is finished, wash it with hot water, the water temperature is 60-70 ° C, and consumption is 1.5-2.0 m3/m3.
i. After filtration and washing, the filter residue should be blown dry with compressed air.
(5) Ion exchange process of how to make rice malt syrup:
The heavy metal salt of the sugar and the pigment are removed with resin. Cleaning water, that is used to wash resin column or filtration, or any other cleaning water in the syrup, must be non-ionized water.
(6) Evaporation process of how to make rice malt syrup: The syrup after the discoloration treatment and ion exchange column is concentrated to 60-80% by a four-effect evaporator, which is better for packing and long time storage.
After all above process is finished, equipment, pipeline, pumps etc. should be clean completely.