Here we call sweet potato starch "Tuan" or "Tuan powder" for short, and sweet potato vermicelli for short.
The subject asked how the sweet potato flour was added. If the vermicelli is simply called "powder" as we say here, the processing of "powder" must first be processed into "dough".
I'm only talking about the indigenous method of processing "dough" and "vermicelli" manually in the past.
After the sweet potato is harvested, the beautiful smooth blocks are selected and sold as commodities, leaving ugly, scarred and large dog-head-shaped sweet potatoes to process dough powder.
Wash the sweet potato to be processed twice, then smash it into residue, and then add water to shake the bag on the vat. Shake the bag is to hang the sweet potato residue bag with cotton cloth, the starch water leaks into the vat, and the residue is dumped and dried as coarse feed for pigs.
Shake one jar and then shake the other jar, stir the starch water and let the starch precipitate naturally. After one day, the clear water on the surface of the jar is washed out and dumped, and the wet starch is below. Take out the wet starch and put it in a cotton bag to hang it, and throw away the sediment at the bottom of the jar.
After hanging for a day or two, the water drops are clean, the starch becomes a ball, and the ball is scattered and dried. After drying, it is a "ball". The first step of making dough is completed.
In winter, vermicelli leaks.
Boil the water first, pour the dough powder in a large basin according to the proportion, heat the water to paste, and each of the boys put out an arm in the basin and knead it together in a circle.
A master with strong arms tied a gourd ladle with seven holes to his arm, and his deputy put the paste into the leaky gourd ladle. The master aimed the leaky gourd ladle at the top of the boiler and hit his right arm with his left hand. The paste leaked into the pot through the seven holes of the leaky gourd ladle, and the bottom of the pot caught fire, which was cooked in a short time.
The powder picker picked out the vermicelli and put it on the rope in the yard.
The next day, the vermicelli was stiff, and it was dried for several days until the vermicelli was processed.
The sweet potato vermicelli processed by us is called sweet potato "powder". It is processed with sweet potato balls.
Pick sweet potatoes, wash and drain them, and take them to the processing plant to grind them.
Next is the point. Prepare a filter screen, a filter rack and a tank (barrel) filled with filtered water, and dissolve the ground sweet potatoes with water. Then pour it into the filter and squeeze out the water by hand, and the water can precipitate sweet potato powder!
There will be these sweet potato residues in the filter. It is not useless to dry these in the sun! . In that rural area, these sweet potato chips can be cooked for ducks, or fed to cows and pigs.
After almost 12 hours of precipitation, pour out the water in the tank, dig out the sediment and put it in another bucket. The top layer needs to put a little water for soaking. The function is to make the impurities in these sediments clean, and the sweet potato powder will be white.
Change the water once a day and leave it for 3~5 days, then you can dig it out and knead it into small pieces to bask in the sun. Be sure to choose the right weather. Generally, you can collect it in one day, and sweet potato powder is not suitable for collection and drying. The best weather is sunny without wind, so as to avoid the sweet potato powder being blown away by the wind.
The raw material of sweet potato powder is sweet potato starch. If you want to make high-quality sweet potato powder, you must first make high-quality sweet potato starch. The practice of sweet potato starch is very simple, which is common in rural areas.
1. Wash the sweet potato
Choose sweet potatoes with smooth appearance and no obvious defects, and rinse them with clear water, especially the depressions of sweet potatoes must be cleaned with a brush to remove the soil.
Step 2 smash
In the past, it was crushed manually, but now it is generally crushed by machine, which has a high powder yield. If it is cooked and eaten by yourself, it is recommended to use manual grinding. Although the powder yield of manual grinding is low, it has a delicate taste and is more delicious than that of machine grinding.
Step 3 filter
After the cleaned sweet potato is fully crushed, it is in a paste state, and it is put into a filter screen to filter out the slurry. The four corners of the filter screen are tied with ropes, spread out and hung up, the crushed sweet potato paste is put in, and water is added while shaking, so that the sweet potato paste is separated from the sweet potato residue until the sweet potato residue is obviously reduced and clean. Observe the filtered sweet potato slurry. If the slurry becomes clear and transparent, it proves that the sweet potato starch is completely separated from the sweet potato residue.
Step 3 precipitate
There is still a lot of water in the filtered sweet potato starch. At this time, it is necessary to separate the sweet potato starch from the water. The next thing we have to do is precipitation. Under normal circumstances, the sweet potato starch will precipitate for about 5 hours, and then the water will be gently poured out, leaving the sweet potato starch. At this time, the sweet potato starch is still turbid, and the quality is not the best. Then, add clear water, stir well and continue to precipitate once, and you will get high-quality sweet potato starch.
Step 4 dry
After you get the sweet potato starch, dry it immediately. If the weather is fine, expose it to the sun. Otherwise, dry it manually, such as using drying equipment or using your own stove in rural areas. Be sure to dry all the water so that the sweet potato starch can be stored for a long time without mildew. Remember.
1. Boiled powder
500 grams of sweet potato starch, 2.5 kilograms of purified water, put the sweet potato starch into the water and stir it evenly. Be sure to add cold water into the powder, because warm water is easy to agglomerate. Then boil water from the pot, stir while burning until the sweet potato starch becomes paste, and then cool in the pot.
Step 2 make sweet potato powder
After cooling, the sweet potato starch is in a micelle state, so we scrape off the gelatinous sweet potato starch layer by layer with a scraping tool, or we can cut it into thin slices with a knife, put it in a bowl, add seasoning and mix well, and a bowl of fragrant sweet potato jelly is ready.
Here, sweet potato powder refers to sweet potato starch. Although shopping in supermarkets and vegetable markets is very convenient now, there are all kinds of sweet potato starch and corn starch. However, in the rural areas where flowers are unfamiliar, all elderly people at home like to grow their own sweet potatoes and make their own sweet potato starch.
Every second half of the sweet potato harvest season, every household will take the sweet potato home from the field, and then take advantage of the sunny weather to get busy and prepare to make sweet potato starch. The technical content of making sweet potato starch is actually not high, but some people make sweet potato powder with yellow and black color and coarse particles, while some people make sweet potato pink, white and delicate, and the key lies in careful patience in material selection and production.
If it is originally intended to be used for starch, then the varieties should be selected when planting. The flour yield of different varieties of sweet potatoes is still very different. While selecting varieties, we should also examine the regional problems, because some of them have high flour yield, but they are suitable for planting in the north, while others are suitable for planting in the south.
After the sweet potato is harvested, you should choose a sweet potato that is disease-free and intact. If there are bumps, rot or wormholes, we must pick them out and discard them. All these will affect the quality of sweet potato starch.
Wash the selected sweet potatoes thoroughly with clear water. Many sweet potatoes are not smooth on the surface, and there are many small pits, which will accumulate soil. These dirty things should also be brushed clean.
If you want to make the sweet potato white in color, you'd better peel it directly, peel it off with dirt, and then clean it.
Earlier, sweet potatoes were beaten with a stone mill. It is to cut the sweet potato that is washed and dried into small pieces, and then grind the sweet potato pieces into pulp with a stone mill. This process takes a lot of time and energy.
Now, it's all mechanized. If the quantity is large, use the machine that specially pulps sweet potatoes. The pulp is fast and the flour yield is high. If the amount is small, you can also use a home cooking machine, add water and stir for several times, and the powder will be more.
The polished sweet potato pulp is filtered out with a piece of fine gauze, and the pulp juice is packed in a clean container. After squeezing it once, it can be mixed with clear water and filtered several times to filter out the starch juice as much as possible.
Because of the large amount, in the past, when filtering starch juice in rural areas, there was a special filter frame, which was made of a large piece of gauze and several pieces of wood. The sweet potato pulp mixed with water was filtered through this filter frame again and again, and the filtered starch juice was filled in a large wooden barrel. The gauze used for filtration must be thin, so that there will be less impurities.
Let it stand for a period of time, and when the starch juice in the container is completely precipitated, scoop out the upper water and pour it out. After that, clean water is injected, precipitated, and the upper muddy water is poured out, and repeated several times until the impurities in the slurry are completely removed. The more precipitation times, the better the quality of sweet potato starch will be.
Scoop out the powder in the container, wrap it in a gauze bag, hang it in the sun, and dry the excess water inside.
The next day, pour the powder out of the gauze bag and spread it on the utensils to dry. All the utensils used here are made of bamboo, and the surface must be cleaned, or spread a clean plastic film until the starch is completely dried. Starch must be fully dried, otherwise it will not be easy to preserve.
I am very happy to answer this question! Sweet potato powder in rural areas has many uses, which are both economical and healthy. So how is the sweet potato powder processed in rural areas?
The choice of sweet potato is the key for farmers to process more and better sweet potato powder. The choice of sweet potato needs to be fresh, so that the starch inside the sweet potato is enough. If it is a sweet potato that has been dried for a long time, the internal powder content is very small, and farmers will not choose such sweet potatoes to powder.
The sweet potato is selected, and the next step is the specific processing. First of all, you should wash the sweet potato, and all the positions that can be washed should be washed in place. If the unwashed sweet potato is used to powder, there is sediment in the powder, which affects the taste.
The washed sweet potatoes need to be carefully examined one by one in the next step. Some gaps that have not been washed must be cut off with a knife, and there can be no mud, at least the eyes can't see it.
After inspection, the sweet potato needs to be cleaned again to ensure that the sweet potato is clean.
The washed sweet potatoes should be put on the ground to dry the water on the surface. Then you need to crush the sweet potato with a machine. In the process of crushing the sweet potato, you need to add clean water and crush it with the sweet potato.
The crushed sweet potato needs to be filtered at last. This process is to filter out all the residue of sweet potato and separate starch from residue. In this process, the broken sweet potato should be mixed with water first, and the sweet potato mixed with water should be poured into the filter cloth, so that the starch and water will flow out, and the filter cloth is slag.
Put the filtered starch and water into a container and let the starch precipitate. When the starch settles tightly, pour off the water above, and the sweet potato powder below is what we need.
At this time, all the steps are not over yet. This is because there is still water in the starch, so you need to dress it up and put it in a clean place to dry. Finally, the dried starch is the finished product.
1 sweet potato is cleaned and powdered, and the bad sweet potato and impurities are removed by cleaning the sweet potato. Then crush the sweet potato with a crusher, and then put the crushed sweet potato in a clean basin. If you want more sweet potato powder, you need to crush more raw sweet potatoes.
2 Prepare the tools for rinsing sweet potato powder, square white cloth together, four ropes, more buckets or cylinders for holding water, and one water pipe with water pipes. Come down, tie the white cloth around the four corners with ropes and hang it, then pour the crushed sweet potatoes into the white cloth. You can't pour too much at a time. Use a half-big basin and at most two pots. Come down and pick up the hose and add water to the white cloth. There is not too much water. Put a basin under the white cloth. Then shake the white cloth to let the water and crushed sweet potato shake back and forth, and add water to the white cloth at the same time. When the crushed sweet potatoes in the white cloth are all sweet potato residues, take out the sweet potato residues and pack them in bags to feed the livestock. Pour the water under the white cloth into the prepared bucket or cylinder, and repeat the above actions. When the bucket and cylinder are full, cover them to prevent them from falling into dirty things. When the water in the jar and barrel settles to the next noon, pour out the water in the jar and barrel and the sweet potato powder will settle at the bottom of the jar and barrel.
3 Dry the sweet potato powder and store it. Dig out the sweet potato powder in the jar and barrel and put it in the sun to dry. Because of the cold weather, put it in the house at night, take it out during the day and continue to dry it. When the sweet potato powder is dry, put it in a plastic bag!
Many people don't know how white sweet potato powder is processed. Processing sweet potato powder is a very tedious and troublesome job. I have 5 years of processing experience to talk to you.
Sister Li is a post-60s, talking about the old-fashioned processing of powder lumps. After the production was distributed to households, eldest brother took the lead in contracting the powder room processing in a small production team and bought six cement tanks, shredders, nets, etc., and many tools.
1, the collected sweet potatoes are washed with clear water and rubbed with a big broom.
2. Put the small pieces into the pulverizer and divide them into large pieces to avoid choking the machine and damaging the machine parts.
3. Semi-burying the cement tank in the ground, about 1 m above the ground, which is convenient for manual stirring. Hanging a net rack on it and swinging it back and forth manually requires a little skill. The powder water leaks and precipitates, and the mouth of the tank is not enough for half a meter, which is convenient for stirring the tank. All of them are stirred up and naturally precipitated, and the remaining powder residue can be used as pig feed.
4. After one day of sedimentation, skim the water the next day, stir it up again, precipitate it again, and repeat the stirring for three times. If there is coarse slag, it will naturally precipitate to the bottom of the tank. It's hard work, and it's hard to stir the tank without a hand. Fortunately, it's all modern now, and the cement tank has become a cement pool, which is much more convenient.
1, if you sell dry powder noodles, you can choose to dry them in sunny days, break off small pieces and put them in bags for storage. Sister Li sells more wet powder, and they all make bean jelly at home or dry them for later use.
2. Sister Li's house is made of vermicelli. The precipitated powder cylinder can be soaked in water all the time. Just fish it directly in the water, which saves time.
1 sweet potato is cleaned and powdered, and the bad sweet potato and impurities are removed by cleaning the sweet potato. Then crush the sweet potato with a crusher, and then put the crushed sweet potato in a clean basin. If you want more sweet potato powder, you need to crush more raw sweet potatoes.
2 Prepare the tools for rinsing sweet potato powder, square white cloth together, four ropes, more buckets or cylinders for holding water, and one water pipe with water pipes. Come down, tie the white cloth around the four corners with ropes and hang it, then pour the crushed sweet potatoes into the white cloth. You can't pour too much at a time. Use a half-big basin and at most two pots. Come down and pick up the hose and add water to the white cloth. There is not too much water. Put a basin under the white cloth. Then shake the white cloth to let the water and crushed sweet potato shake back and forth, and add water to the white cloth at the same time. When the crushed sweet potatoes in the white cloth are all sweet potato residues, take out the sweet potato residues and pack them in bags to feed the livestock. Pour the water under the white cloth into the prepared bucket or cylinder, and repeat the above actions. When the bucket and cylinder are full, cover them to prevent them from falling into dirty things. When the water in the jar and barrel settles to the next noon, pour out the water in the jar and barrel and the sweet potato powder will settle at the bottom of the jar and barrel.
3 Dry the sweet potato powder and store it. Dig out the sweet potato powder in the jar and barrel and put it in the sun to dry. Because of the cold weather, put it in the house at night, take it out during the day and continue to dry it. When the sweet potato powder is dry, put it in a plastic bag!
In our countryside, sweet potato powder is processed like this.
Digged sweet potatoes, if you want to make sweet potato powder, I will mention it to the stream to wash it. Be sure to clean the soil on it and brush it with a brush.
These are washed sweet potatoes, and I also cut the smaller ones clean with a knife. If there is a nest, I'm afraid there is. The soil is in it. Make sweet potato powder must be washed very clean, there can be no sand.
This is the sweet potato I made. Beat it like this with a machine. Because there is a lot of powder in it, it is necessary to smash the sweet potato before washing it.
We wash the sweet potatoes bit by bit. It is very hard in these processes of manufacturing. Sweet potatoes should be washed clean bit by bit. Sweet potato powder will precipitate out.
These are in the bucket. We washed the sweet potato powder. Let it settle in a barrel. What precipitated was sweet potato powder. This is the production process of rural sweet potatoes, which are always eaten. I planted it myself.
Hello, I'm Xiaomei, the creator of agriculture, countryside and farmers. This is how farmers make sweet potato flour.
First, first, wash the sweet potatoes dug back from the field and cut off the bad and bad parts; The sweet potato must be cleaned, which is related to the final quality of the product.
2. After all the sweet potatoes are cut, pour them into the machine several times, let the machine grind the sweet potatoes into sweet potato residue, and crush the sweet potatoes with a crusher.
3. After all the pieces are minced, add water, stir, adjust to sweet potato pulp, and then leak powder and slag.
Fourth, pack the filtered slurry. After some time, the powder will sink to the bottom, and then the water will be poured out.
5. Take out the slurry and dry it in the sun.