Potato flour potato in time

Potato flour sweet potato early start maturity is not enough, the rate of flour is low; late start vulnerable to frost, also affect the rate of flour. Early-maturing varieties, to local frost potato, late-maturing varieties to local frost to frost 10 days after the start of potato, flour rate is high. The temperature is suitable, the pulp fermentation fast, out of the starch more. If the temperature is too low, the starch is gradually converted into sugar, reducing the rate of flour.

Shorten the storage period as much as possible

Sweet potato with the prolongation of the storage time, the starch is gradually converted to sugar, the rate of flour will be reduced. Processing sweet potatoes within 20 days after harvesting can improve the flour yield. If the number of sweet potatoes, can also be stored after processing, but should try to shorten the storage period, and pay attention to control the temperature and humidity in the cellar, in order to prevent the sweet potato dry heart.

Selection of potatoes

Selection of "a nest of red", "victory hundred" and other white varieties, than "138" and other red varieties can be more starch 10% or so, and the powder is white, powder quality is good. And powder block white, powder quality is good. Cleaning out moldy sweet potatoes, wash the mud and other debris sticking to the potato, rinse with water many times and prepare for use.

Milling

First, soak the sweet potato in dilute alkaline water or soda solution, and then pour it into the milling tank.

Sedimentation

Sedimentation of pulp milk after grinding for 24 hours, and then according to the ratio of 50 grams of white wine per 50 kg of sweet potatoes, add the right amount of water diluted and poured into the mix, and then wash the pulp.

Pulp washing

Potato flour washing pulp with gauze filtration, filtration while shaking, scrubbing, while slowly adding 2-2.5 times the water, until the filtered water turns clear. Precipitation 10-12 hours after drainage to remove scum and clear liquid. If the water is still as turbid as just filtered. According to 500 kg of water into the proportion of 150 grams of alum, alum crushed with a little water diluted and poured into the barrel after mixing, 4 hours after the water can be propped up.

Drying

After the water is drained, the filter cloth is laid flat on the starch. When the starch is dry, cut it into pieces with a knife, take it out and dry it in the sun to collect and process or sell.