Potato cell water protein extraction process

Abstract

The invention discloses a potato cell water protein extraction process. The process comprises the steps that a, potato cell process water is subjected to hydrocyclone separation; b, impurities are filtered out through a screen; c, the water enters a pipeline mixer through a conveying pump and a flow measuring device; d, a flocculating agent and a coagulant aid are injected in a flocculating agent preparation tank, the temperature is raised to 35 DEG C, and the mixture is mixed to be uniform and then conveyed into the pipeline mixer through a quantitative conveying pump; e, the PH value of potato cell water feed liquid is regulated, a 6N-HCl reagent is pumped into the pipeline mixer by the quantitative pump through an acid preparation tank, and the PH value is regulated to 3; f, the potato cell water feed liquid is put in a maintaining tank for a stationary reaction and then centrifuged in a centrifugal machine under the centrifugal condition of 3,500 rpm for 10 minutes, and the obtained crude protein product is dried in an airflow dryer through a spiral feeder and then weighed, packaged and sealed; g, obtained clear liquid is discharged after the PH value is regulated. Protein in the potato protein process water can be removed efficiently at a time.

Description

technical field [0001] The invention relates to the technical field of biological applications, in particular to a protein extraction process of potato cell water. Background technique [0002] In the five northwestern provinces and the northeast region of China, potatoes are the main local crops. The demand for potato products in my country is very large, and a large part of them still depends on imports. Therefore, the potato deep processing industry is developing rapidly at present, and the country is also vigorously supporting it. The resulting pollution problem cannot be effectively solved. [0003] In the production process of potato deep processing, the potato cell water obtained by separation equipment (such as cyclone separator) is the main pollutant, the concentration of COD is 35000mg / L; the concentration of BOD is 17000mg / L; the total N5000mg / L, TSS5000mg / L, PH5.5, which is far higher than the discharge standard stipulated by the state. The foam formed by potato ...

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Problems solved by technology

[0006] The thermal coagulation process is to extract protein by evaporating water, but the production energy consumption is very high, and it cannot be approved according to the current domestic project energy evaluation standards, and this heating method destroys the active ingredients of potato protein, which cannot be further used. Therefore, the thermal coagulation method is not suitable for my country's national conditions, and is only suitable for use in developed countries in Europe and the United States.

[0007] The air flotation flocculation method is the method for removing protein from potato cell water commonly used in China at present, and the removal rate (flocculation rate) of protein is not more than 50%. Although the cost of the air flotation method is low, it is meaningless because of the low protein removal rate; A large amount of industrial flocculants are used, the flocs obtained by the air flotation method cannot be used, and the amount of foam scraped is large and difficult to handle, which will eventually create new pollution; the continuous use of the aeration tank will also pollute the surrounding air, so the air flotation flocculation method cannot Effectively used in large-scale, continuous industrial production

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