Factors influencing the yield of cassava starch and its preventive measures

During the cassava starch processing, the yield of starch is greatly influenced the cassava starch processing plant economic benefit. There are many factors influencing the yield of cassava starch, like the starch content in cassava, starch extraction technology, the crushing effect, screening degree, also the temperature, water quality, adopted machines and operation process. To improve the yield of cassava starch, we must learn more about these factors and take proactive measures.

Doing Company cassava starch processing machine 3D photo

-1 Raw material:

(1) Variety: high starch content and specialized for starch production used cassava, usually with starch content 22%-26%, the edible type cassava starch content is 18%-22%, also have many cassava starch content just 10%-20%. Some people just beginning the cassava starch production, not understand these enough, blindly purchasing raw materials, not distinguishing varieties, only looking at the top and the appearance, resulting in a lot of cassava with very low starch-producing rate, resulting in a low rate of starch extraction, bad for the plant develop.

So before you start your cassava starch production business, the better way is to install your cassava planting base, or signed the construct with the cassava planting area, implement uniform varieties and standardize cultivation to guarantee the cassava starch content.

Cassava and cassava starch

(2) Cassava storage time:

The starch content of cassava was the highests when they were first harvested. The longer they were piled up, the lower of the starch yield, and the cassava is easy to lignify, so if you want to largely storage the cassava, you need to keep a suitable temperature in your cassava storage room, or prevent to storage the cassava more than 15 days.

(3) Raw material quality:

During your cassava purchasing, pay attention to the raw material quality, don't buy cassava with severe lignification. For another, in the raw materials of fresh cassava, the ratio of pests, water hazards caused by inclusion of excessively large pieces of shredded clay is too much; the soil on the cassava tuber is too much; all these factors will reduce the rate of starch yield. So make sure the raw material quality is essential.

Cassava crushing machine

-2 Cassava crushing effect:

Crushed too coarse, the starch in the unbroken cells is difficult to separate out, affecting the yield of starch; crushing too fine, can easily cause the instant temperature of the raw material to rise, some of starch is easy to gelatinize, affect the starch separation.

Crushing and seperation is two important sections in the cassava starch extraction, so when you select the cassava starch production machine, choose the professional and high efficiency machine is so important, better for improve the cassava starch production yield, and can improve the free starch net filtration rate. Doing Company advanced rasper used for cassava crushing can fully destroy the cassava cell wall, free the starch completely, at same time, no gelatinization phenomenon, make sure the starch yield reach to more than 95%.

Doing Company centrifuge sieve machine guarantee no clogging

-3 The degree of clogging of the screen:

The degree of clogging of the screen is greatly influenced the starch extraction yield, and easily be igored. The protein and pectin absorbs water, easily forms a gelpplugging screen. In severe cases, more than 60% of the screen pores are blocked, which affects the separation of starch. When the jam was light, the starch extraction amount decreased by 5%-15%, and when the jam was serious, the extraction amount can dropped by more than 40%, so you need to clean or replace the screen regularly.

Due to the biological characteristics of the blockage, it cannot be removed by pure water alone. cassava protein is mainly globulin, insoluble in water, and soluble in 2% neutral salt solution, so the blocked mesh is treated with 2% neutral salt solution is easily to clean.

Cassava storage time not too long

-4 Temperature and the settling time:

In the traditional process of hand-made cassava starch, there are many factors that depend on the natural environment in the precipitation process. The temperature is high, the sedimentation speed is fast; the temperature is low, the sedimentation speed is slow, and the time required is long. The first sedimentation time after separating the cassava residues is 4 to 5 hours at a daily average temperature of about 20°C, 6 to 7 hours at about 15°C, and 10 hours or less at a temperature of 10°C or less.

But in the modern cassava starch production process, no need to be limited by these conditions, adopt the automatic cassava starch processing machine, the overall stainless steel material enables the original work to be completed in more than 24 hours can be completed in less than one minute, and the protein, fat, pectin and other non-starch substances can be fully separated from starch slurry, thereby can improving processing efficiency and reducing manual labor, guarantee the starch quality.

Doing Company cassava starch production main machinery

-5 Water quality:

Good qulity water not only better for the starch yield improve, also better for guarantee the starch quality, on the contrary, the starch yield is low, and the quality also difficult to guarantee. So when you decided your plant construction area, you need to consider the water source and water quality, during the starch production, better to use the soft water, generally requests the water clean, aoloeless, odorless, no sedimentation, no pathogens, no hydrogen sulfide, ammonia, nitrates and other toxic substances harmful to humans, its hardness below 15 degrees, PH value 6.5-8.5 is suitable.

When water quality is poor, water should be filtered, disinfected, deodorized or softened before used in the cassava starch production. The water should reach the quality standard of the domestic water.

-6 Human factors:

Traditional settlement method for cassava starch production, because of the non-strict operation, when the flow tank settles and the sedimentation proceeds, the slurry sometimes overflows, causing the starch slurry waste. When residue separation and flow-flume sink settling, there was no timely detection of residual starch in the waste of the cassava residue and the tailings, and no measures were taken for the unseparated pulp and slag, this resulting the low starch yield.

Compared with this, Doing Company modern cassava starch processing machines fully automatic operation for the starch extraction, after the crushing section, when get the starch slurry, then reach to the full sealing production process condition, and the starch extraction speed is fast, don't cause the waste of starch slurry, fully use of the raw materials.