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Purification treatment method of potato starch wastewater

A technology for purification of potato starch and wastewater, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of no potato starch wastewater treatment method, unable to maintain the survival of biological bacteria, and restrict the development of potato industry, etc., to achieve low treatment cost, The effect of low operation and maintenance costs and low equipment maintenance costs

Active Publication Date: 2016-03-02
GANSU BUILDING MATERIALS DESIGN & RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the treatment of potato starch wastewater is difficult. At present, the ideal treatment method used in production is the biological method, but the processing of potato starch is mainly concentrated in September-November. The use of biological methods has low ambient temperature, reduced activity of biological bacteria, and heating. The treatment cost is high, the treatment effect fluctuates and other problems are prominent, and the survival of biological bacteria cannot be maintained normally in the month of production shutdown. At present, there is no effective treatment method for potato starch wastewater in China
With the country's laws and regulations on water pollution prevention and control and the strengthening of supervision, many potato starch manufacturers are facing the situation of being restricted or stopped production, which seriously restricts the development of the potato industry.

Method used

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  • Purification treatment method of potato starch wastewater
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Experimental program
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Effect test

Embodiment 1

[0036] The special flocculant for the separation and treatment of macromolecular organic matter of the present invention is composed of the following components in mass percentage:

[0037]Ultrafine attapulgite 26%, polyacrylamide 18%, ferric chloride 8%, urea 10%, polyaluminum chloride 16%, polyferric sulfate 21% and natural cationic polysaccharide chitosan 1%.

[0038] The above-mentioned components are mixed evenly to obtain a special flocculant for the separation and treatment of macromolecular organic matter.

[0039] The special flocculant for the separation and treatment of small molecule organic matter of the present invention is composed of the following components in mass percentage:

[0040] Chitosan 26%, aluminum sulfate 12%, ferric chloride 12%, polyacrylamide 20%, acetic acid 10%, polyaluminum chloride 10%, alum 10%.

[0041] The above-mentioned components are mixed evenly to obtain a special flocculant for the separation and treatment of small molecular organic...

Embodiment 2

[0043] The difference between this embodiment and embodiment 1 is:

[0044] The special flocculant for the separation and treatment of macromolecular organic matter is composed of the following components in mass percentage: 30% ultra-fine attapulgite, 22% polyacrylamide, 6% ferric chloride, 8% urea, 15% polyaluminum chloride, polysulfuric acid Iron 17% and natural cationic polysaccharide chitosan 2%.

[0045] The special flocculant for the separation and treatment of small molecule organic matter is composed of the following components in mass percentage: 25% chitosan, 14% aluminum sulfate, 15% ferric chloride, 18% polyacrylamide, 8% acetic acid, and 8% polyaluminum chloride %, alum 12%.

[0046] All the other parts are the same as in Example 1.

Embodiment 3

[0048] The difference between this embodiment and embodiment 1 is:

[0049] The special flocculant for the separation and treatment of macromolecular organic matter is composed of the following components in mass percentage: ultrafine attapulgite 25%, polyacrylamide 18%, ferric chloride 8%, urea 12%, polyaluminum chloride 19%, polysulfuric acid Iron 17% and natural cationic polysaccharide chitosan 1%.

[0050] The special flocculant for the separation and treatment of small molecule organic matter is composed of the following components in mass percentage: 30% chitosan, 10% aluminum sulfate, 10% ferric chloride, 22% polyacrylamide, 8% acetic acid, 12% polyaluminum chloride %, alum 8%.

[0051] All the other parts are the same as in Example 1.

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Abstract

The invention provides a purification treatment method of potato starch wastewater. The method comprises the steps as follows: (1) adding a special macromolecular organic matter separation treatment flocculant in the weight 0.1-0.5% of the weight of the wastewater into the potato starch wastewater, stirring to mix evenly, standing for clarification and removing the precipitate to obtain a waste water clarified liquid; and (2) adding a special small molecular organic matter separation treatment flocculant in the weight 0.05-0.35% of the weight of the wastewater clarified liquid obtained in step (1), stirring to mix evenly, standing for clarification, and eliminating the precipitate to obtain purified potato starch wastewater. The method uses a flocculation method for the treatment of potato starch wastewater, eventually reduces COD value to 200-300 mg / L, reaches COD removal rate of more than 99%, and achieves the purpose of purification treatment of potato starch wastewater through two levels of treatment; and the purified potato starch wastewater has COD index reaching the national standard and can be directly discharged into the municipal wastewater treatment system.

Description

technical field [0001] The invention relates to a method for purifying and treating potato starch wastewater, in particular to a method for treating potato starch wastewater by using a flocculation method. Background technique [0002] my country is a large potato production and consumption country. A large amount of wastewater is produced in the process of potato starch processing. Since the COD value of potato starch wastewater is extremely high, direct discharge will affect the survival of fish and other aquatic animals. At the same time, anaerobic microorganisms in the water decompose the organic matter in it. Harmful gases such as hydrogen sulfide, ammonia and mercaptans are released, which deteriorate water quality, seriously pollute rivers, reservoirs and the surrounding atmospheric environment, so they must be treated. However, the treatment of potato starch wastewater is difficult. At present, the ideal treatment method used in production is the biological method, bu...

Claims

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Application Information

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IPC IPC(8): C02F1/52C02F1/56C02F1/54
Inventor 李文斌冯启彪邵继新李鸿洲田斌守孟渊张馨予王音璇袁静司双龙杨雷俊
Owner GANSU BUILDING MATERIALS DESIGN & RES INST CO LTD
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