How to extract arrowroot

Timely mining and excavation of Pueraria to grasp a good time, generally should be in late November to March the following year. After winter, the nutrients of the vine leaves on the ground were transferred to the underground rhizomes for storage. At this time, the starch content was the highest. It is better to use Pueraria, which has two to four years of age. The pueraria root should be extracted within 3 to 5 days in order to avoid mildew affecting the quality and decomposition of carbohydrates, resulting in a drop in the rate of flour extraction. Wash the scraper skin and cut the kudzu rooted with a knife to remove the rattan stalk, tail whisker, side root and damaged part, put it in clean water for 1-2 hours, and wash the mud and debris, then use a knife to scrape the skin. Then rinse in clean water and filter dry. Slurry filter Wash Pueraria radix with a special refiner to form a slurry, or cut a root section with a length of 10 cm and a diameter of about 5 cm, put it into the pulper, and add water to the broken edges. After stirring evenly, the slag is filtered by 80 mesh or 100 mesh steel wire mesh, respectively. If there is no grinding machine and wire screen, it can also be placed in wooden troughs, smashed with wood or smashed with a stone, packed into a filter cloth bag and placed in a cylinder filled with clean water. The slurry was filtered to remove the residue. Precipitate Place the sifted slurry into a sedimentation tank or tank, add trace alum solution, and stir it in the same direction with a clean bamboo stick to sink impurities on the bottom. After the sedimentation, the upper aqueous solution is drained, and the yellow powder (extractable flavonoids) is separated and packed in a container. After adding appropriate amount of fresh water and stirring, let stand for 12 hours and drain the upper layer of water. Cover 3-4 layers of white cloth on wet kudzu powder and dry the remaining moisture. Remove the white cloth by drying, separate the upper yellow powder with a spatula, put it in a container for use, remove the sediment or the wet powder in the tank, eliminate the bottom of the residue, and then send the pure powdered noodles into the drying room to dry it with a slow fire, or Bake out in an electric oven or microwave oven. Can also be placed in a clean bamboo tray or drying pad, dried in a sunny, pollution-free place, that is, pure white silver powder. The separated yellow powder can also be dried and stored, or packaged and sold as required.