Potato Starch Production Process China
Potato starch is the main material for preparation of medium. In production or experiment application of potato starch has two methods: one method is to wash the new potato (potato) and dig to body-to keep, remove skin after weighing, take the potato 200 grams, cut into shreds, boil 1000 ml of water for 15 minutes to 30 minutes, a little cool, with four layers of cotton gauze filter, after get filtration liquid and 1000 ml water foot! This method of potato starch should be based on the need to be made at the time of production.
Another way is to peel to body-to keep potato into pulp, filled with water in the container to make and four layers of gauze filter 2 ~ 3 times, the filtrate of natural precipitation, precipitation after removing on a clear night, then, will receive the starch thin lay in the glass dry. Finally, the fully dry starch is sealed in the container so that it can be used in the future. The seed is called starch 20 grams, add water 1000 milliliter can. The nutrient content of potato starch made from this method is almost nondestructive.
3. Methods for the preparation of malt juice:
Take barley 1 kg in warm water soak a filter out day and night, tile in the pan, cover layers of wet gauze moisturizing, insulation, and then placed at 24 ℃ under the condition of training, for most of the malt grow wheat and for its length when cleaning, drain off, dolly, filter, precipitation after its on a clear night. 1 kg of barley germination prepared on the night can be 2000 ~ 3000 ml medium. Fresh wort should be made available now, spare parts should be kept in refrigerator.
When the malt is used, it can be dried and preserved. When needed, the malt 200 grams will be crushed to add 1000 ml water.
The method of determination of saccharification: to take 0.5 ml of saccharification liquid, and to add iodine droplet, if there is no orchid, it can be described as saccharification.
4. Methods of making yeast juice:
Both dry preparation from malt wort and fresh made from malt wort need to be in the temperature of 80 ℃ ~ 82 ℃ under the condition of saccharification 2 ~ 3 hours, and the determination of saccharifying boiling filtered spare completely.
Take the dry yeast 7 ~ 10 g, add 1000 ml of water, boil, settle the clarification, remove the liquid, and after filtration, replace the yeast paste. Add 10 ml of yeast extract per 1000 ml medium.
Can also put the dry yeast powder that comes, add water right amount, under the condition of 53 ℃, heat preservation for two days and nights, to dissolve yeast and yeast from the solution. When the water is diluted to 1% (i.e., 100ml water contains dry yeast 1 gram), boil 10 to 15 minutes, cool, adjust PH to 4.5, remove the liquid, and adjust PH to 7 ~ 7.4. 5 ~ 10 ml per litre of yeast from solution or as appropriate.
5. Modulation of natural medium or semi-synthetic medium:
The process of modulating natural medium or semi-synthetic medium is different due to different materials. Generally speaking, the selected materials are grain, plant stems root bark, etc., should be first made leachate. Grain is to be washed in clear water; Potato, sweet potato, taro, carrots and other stems, should be washed first, peel, then weigh; Wood materials should be selected from young shoots or edges and crushed or cut into small pieces; Mash the berries should paste, after weighing add just the right amount of water, then boil, change a small fire boil 10 ~ 15 minutes (grain time should be extended to 1 ~ 2 hours), strike with multilayer gauze filter, supplement moisture, add AGAR, continue to heat until AGAR. Add other ingredients, melting sugar joined after the ceasefire and fully stir to dissolve. This should be done with a hot test tube or a triangle bottle, a petri dish and other containers.
Starchy material such as rice flour, corn flour, after weighing, add a small amount of cold water into a paste, then add the rest of the water, then boil it with four layer gauze filter, filter juice is heated and to join other components by the method, after waiting for various materials fully molten strike repackaging tube or other containers.
Soluble starch, dextrin, potato starch after weighing into add a little cold water slurry, add the rest of the water, after boiling add AGAR, again according to the aforementioned method to join other components, dissolves after packing container.
Humus soil, the stable fertilizer, compost extract, according to the method after boiling, the filtrate contained in a beaker, below 4 ℃ low temperature place let stand for the night, and then draw on clear liquid, supplement moisture, again, in turn, add AGAR, inorganic salt and sugar.