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Method for recycling potato residue and waste water in production process of potato starch

A potato starch and production process technology, applied in the direction of separation methods, other chemical processes, chemical instruments and methods, etc., can solve the problems affecting the surrounding environment and the sustainable development of the potato starch processing industry, high organic matter content and COD value, equipment High operating costs and other issues, to achieve the effects of low equipment and operating costs, reduced organic matter content and COD value, and improved dehydration efficiency

Inactive Publication Date: 2011-03-30
甘肃省农业科学院农产品贮藏加工研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the main treatment method of wet potato residue is to directly squeeze and dehydrate and then dry, but the dehydration efficiency is low, the drying speed is slow, and the energy consumption is high.
The organic matter content and COD value in the wastewater (generally excluding potato washing water) are too high, and the direct discharge pollutes the environment
Although the existing treatment methods can achieve discharge standards, the equipment and operating costs are high, and it is difficult to put them into practical application. Some of them also have secondary pollution, which affects the surrounding environment and the sustainable development of the potato starch processing industry.

Method used

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Experimental program
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Effect test

Embodiment 1

[0027] Such as figure 1 The method for recycling potato residue and waste water in the production process of potato starch of the present invention includes the following steps:

[0028] (1) Preparation of filter aid adsorption materials 1 and 2

[0029] Prepare the corn stalks into particles with a size of 1-30 mm through a physical crushing method, which are used as the filter-aid adsorption material 1;

[0030] The attapulgite is prepared into particles with a size of 0.1-5 mm through a physical crushing method, which is used as the filter-aid adsorption material 2;

[0031] (2) Mix the wet potato residue after potato starch processing with wastewater (potato residue: wastewater = 1:0.1 (w / w)), add the filter-aid adsorption material 1 to 0.5% of the weight of the mixture, mix and stir for 10 minutes, then enter The screw extrusion filter continuously filters to obtain the filter residue and filtrate. The obtained filtrate is continuously filtered through a screw extrusion filter ...

Embodiment 2

[0033] (1) Preparation of filter aid adsorption materials 1 and 2

[0034] The Codonopsis pilosula stalk is physically crushed into particles with a size of 1-30 mm, which are used as the filter-aid adsorption material 1;

[0035] The attapulgite is prepared into particles with a size of 0.1-5 mm through a physical crushing method, which is used as the filter-aid adsorption material 2;

[0036] (2) In the wet potato residue of potato starch processing, 2% of the weight of the wet potato residue is added to the filter-aid adsorption material 2 and mixed and stirred for 15 minutes, then enter the filter for continuous filtration to obtain filter residue and filtrate. The obtained filtrate is then continuously filtered through the filter with the filter-aid adsorption material 1, the material layer is 35 cm thick, and then the filter residue and the filtrate are generated. The filter residue obtained in the above two steps can be directly dried into feed material or added with bacteria...

Embodiment 3

[0038] (1) Preparation of filter aid adsorption materials 1 and 2

[0039] Prepare the wheat straw into particles with a size of 1-30 mm through a physical crushing method, which is used as the filter-aid adsorption material 1;

[0040] Prepare diatomaceous earth into particles with a size of 0.1-5 mm through a physical pulverization method, which is used as a filter-aid adsorption material 2;

[0041] (2) In the potato starch processing wastewater, 8% of the weight of the wastewater is added to the filter-aid adsorption material 1 and mixed and stirred for 20 minutes, then enter the screw extrusion filter for intermittent filtration to obtain filter residue and filtrate. The obtained filtrate is then intermittently filtered through a screw extrusion filter with the filter-aid adsorption material 1, the material layer is 50 cm thick, and then filter residue and filtrate are generated. The filter residue obtained in the above two steps can be directly dried into feed material or ferm...

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Abstract

The invention relates to the field of industrial production of potato starch and provides a method for recycling potato residue and waste water in the production process of potato starch. The method mainly comprises the following steps of: respectively pulverizing crop straws and porous mineral substances used as a feedstuff additive into certain size of particles as filtering-assisted adsorbing materials through a physical method; and carrying out filtering treatment by stages by utilizing the two filtering-assisted adsorbing materials in a process of recycling potato residue and waste water organic matters generated when processing the potato starch. The recycled organic matters, such as small particle starch, protein, polysaccharide, and the like and the filtering-assisted adsorbing materials can be together used as feedstuff materials, and the purpose of purifying the waste water is also achieved; and the purified water can be used as washing water for potato processing directly or through precipitating.

Description

Technical field [0001] The invention relates to the field of industrial production of potato starch, in particular to a method for recycling potato residue and waste water in the production process of potato starch. Background technique [0002] Potato starch processing often uses raw materials such as potatoes, sweet (sweet) potatoes, cassava, etc. During the production process, a large amount of wet potato residue and waste water will be produced. These by-products contain a large amount of organic matter such as protein and polysaccharides. Potato residue contains a large amount of organic matter such as pectin, protein, and small granular starch. It has high viscosity, strong water holding capacity, difficult to squeeze and dry and dehydrate, and the chemical oxygen demand (COD) value of the extracted water is relatively high. At present, the main processing method of wet potato residue is direct pressing and dehydration followed by drying, but the dehydration efficiency is l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23K1/14A23K1/175C02F9/02B01D37/02B01J20/24C02F1/28A23K10/12A23K10/37A23K20/28
CPCY02P60/87
Inventor 庞中存汪大辉张永茂黄玉龙田世龙管海军
Owner 甘肃省农业科学院农产品贮藏加工研究所
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