Fresh cassava soaking and washing method

Abstract

The present invention discloses a fresh cassava soaking and washing method which abandons the traditional cassava leaching process and sends a dry-method mud-removed and peeled cassava into a cassava washing tank to conduct four-stage soaking and washing. The dry-method mud removing and peeling process before soaking and washing can reduce the load in the subsequent steps of soaking and washing, etc., and save cleaning water. Cassava washing water is recycled and reused after the precipitation treatment and the water consumption is also reduced. The innovative structure design of the cassava washing tank can reduce production water and the waste water discharged volume. The purpose of terminal emission reduction is realized by the measures, the waste water discharged volume per ton of cassava starch is reduced to about 9.6-10 m<3> with a decrease by about 50%, and the entire production system has a high degree of automation, uses less labor and is easy to operate. By means of strengthening the control from the source, reducing the process emission, recycling and other means, the fresh cassava soaking and washing method improves the utilization of water resources, reduces the amount of pollutants to the maximum, and ultimately realizes balance between economic growth and environment-friendliness.

Description

technical field [0001] The invention belongs to the technical field of cassava starch production, and in particular relates to a method for soaking and washing fresh cassava. Background technique [0002] Cassava starch processing enterprises have always been large consumers of water resources and have a large amount of wastewater discharge. Most starch processing enterprises mainly adopt the traditional production process: drum rinsing → secondary hammer crusher crushing → screening → sand removal → refining and separation → dehydration → air drying → packaging of finished products, etc., briefly described as fresh cassava transportation Into the drum, the cassava in the drum is continuously pushed forward along the axial direction and radial direction, the cassava in the drum is continuously rinsed with water during the conveying process, the cassava washing water is continuously discharged, and the cassava in the drum is sent to The cassava slurry is obtained through cru...

AI Technical Summary

Problems solved by technology

Due to the ineffective recycling of water resources, serious waste of water resources and increased cost of environmental protection water treatment

The common reasons for this kind of problem are: on the one hand, because the awareness of water resource recycling is very weak, the recycling of process water is not considered at all in the process of product process route design; on the other hand, the overall equipment level in the industry is backward, and the technical reserve is insufficient , in order to ensure the yield and quality of starch, most enterprises have to use clear water to wash repeatedly, resulting in serious waste of clear water, and the wastewater discharge per ton of cassava starch products (about 20-23 3 ) remain high

[0003] Among them, in the cleaning process of fresh cassava, almost all adopt the washing method, that is, the fresh cassava is washed with water while being pushed forward in the drum, and the fresh cassava washing water is directly discharged from the drum, and the washing water is not efficient. ground recycling

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