Composite flocculating agent and method for processing maize soaking water

A composite flocculant and corn soaking water technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of waste of resources, high cost, poor recycling of protein, etc., achieve good flocculation and reduce environmental protection treatment costs Effect

Inactive Publication Date: 2012-10-17
COFCO BIOTECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the soaking water contains a large amount of organic matter such as protein, the COD and BOD of the soaking water itself are as high as 30,000 mg / L or more, resulting in high cost of environmental protection treatment;
[0005] 2. The protein in corn soaking water is not well recycled, resulting in waste of resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] This example is used to illustrate the treatment method of corn soaking water provided by the present invention using the composite flocculant of the present invention.

[0035] will be 10m 3 Corn soaking water (COD value is 35000ppm, protein content is 2.8% by weight, other solids content is 5% by weight) is heated to 52°C, and 2kg of composite flocculant (content of sodium polyacrylate is 85% by weight, carboxymethyl shell The content of polysaccharide is 0.5% by weight, the content of montmorillonite is 10% by weight, and the content of diatomaceous earth is 4.5% by weight), after stirring at 30 rpm for 2 minutes, the stirring is stopped. After static flocculation at 52° C. for 30 minutes, the solid-liquid mixture at the bottom of the flocculated mixture was overflowed into a decanter for solid-liquid separation.

[0036] The obtained solid part is dried by a drum at a drying temperature of 60° C., packed and made into a high-protein feed to obtain 500 kg of feed with...

Embodiment 2

[0040] This example is used to illustrate the treatment method of corn soaking water provided by the present invention using the composite flocculant of the present invention.

[0041] will be 10m 3 Corn soaking water (COD value is 40000ppm, protein content is 3.0% by weight, other solid content is 5.5% by weight) is heated to 58°C, and 6kg of composite flocculant is added (the content of sodium polyacrylate is 75% by weight, carboxymethyl shell The content of polysaccharide is 0.6% by weight, the content of montmorillonite is 14.4% by weight, and the content of diatomaceous earth is 10% by weight), after stirring at 40 rpm for 2 minutes, the stirring is stopped. After static flocculation at 58° C. for 35 minutes, the solid-liquid mixture at the bottom of the flocculated mixture was overflowed into a decanter for solid-liquid separation.

[0042] Gained solid part is dried by drum, drying temperature is 65 ℃, makes high-protein feed after packing, obtains feed 508kg, and its ...

Embodiment 3

[0045] This example is used to illustrate the treatment method of corn soaking water provided by the present invention using the composite flocculant of the present invention.

[0046] will be 10m 3 Corn soaking water (COD value is 38000ppm, protein content is 2.5% by weight, other solids content is 4.5% by weight) is heated to 55°C, and 4kg of composite flocculant (content of sodium polyacrylate is 80% by weight, carboxymethyl shell The content of polysaccharide is 0.3% by weight, the content of montmorillonite is 12.7% by weight, and the content of diatomaceous earth is 7% by weight), after stirring at 40 rpm for 1 minute, the stirring is stopped. After static flocculation at 55° C. for 40 minutes, the solid-liquid mixture at the bottom of the flocculated mixture was overflowed into a decanter for solid-liquid separation.

[0047] Gained solid part is through drum drying, and drying temperature is 60 ℃, makes high-protein feed after packing, obtains feed 450kg, and its prot...

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Abstract

The invention provides a composite flocculating agent which comprises the ingredients as follows: sodium polyacrylate, carboxymethyl chitosan, montmorillonite and diatomaceous earth. The invention further provides a method for processing maize soaking water by applying the composite flocculating agent. The method comprises the following steps: under flocculation condition, mixing and standing the maize soaking water with the composite flocculating agent; and conducting solid and liquid separation to the flocculated mixture. The composite flocculating agent is used for processing the maize soaking water to be capable of well recycling protein in the maize soaking water, protein content of feed manufactured by the solid part obtained after processing is higher, the COD (chemical oxygen demand) value of the liquid obtained after processing is greatly reduced, the environment friendliness processing difficulty is lowered, and better environment protection is achieved.

Description

technical field [0001] The invention relates to a flocculant and a water treatment method, in particular to a composite flocculant and a treatment method for corn soaking water. Background technique [0002] The corn soaking water contains more organic components such as protein (about 4-6% by weight), phytin and sugar. These organic components, on the one hand, are the "culprits" that cause the high pollution load of corn soaking water, and on the other hand, they are valuable natural resource wealth. At present, among these organic components, except for Phetine, which is extracted as a raw material for inositol production, the rest have not been rationally and effectively developed and utilized, and have instead become a serious source of pollution. Obviously, if these organic components are extracted to the greatest extent and converted into corresponding products, not only can the comprehensive utilization of resources be realized, but economic benefits can be increase...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F1/56
Inventor 罗虎满云顾宗池廖四祥王慧娟
Owner COFCO BIOTECHNOLOGY CO LTD
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