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Method for recovering waste water generated in production of starch sugar

A technology for producing waste water and recycling methods, which is applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problems of waste of water resources, large consumption of water resources, etc., and achieve production The effect of large water volume, saving water treatment cost and simple operation

Active Publication Date: 2013-01-09
BAOLINGBAO BIOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Starch sugar production consumes a lot of water resources every year, and the final water discharge is about 40 million tons. On the one hand, the final water discharge needs to be treated, and the treatment cost is about 120 million yuan per year. On the other hand, it causes a lot of waste of water resources.

Method used

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  • Method for recovering waste water generated in production of starch sugar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The waste water treatment and recovery process of fructose syrup production is as follows:

[0022] 1. 200 tons of production wastewater, the measured initial conductivity is 2482μs / cm, pH is 5.32, COD is 3500mg / L, and sodium hydroxide is added to adjust the pH to 6.5.

[0023] 2. Add 35mg / L of polyaluminum chloride, keep warm at 30°C for 30min, and then enter the plate frame for filtration.

[0024] 3. The pressure difference between the inlet and outlet water of the control plate and frame filter is 0.04MPa. After the filter residue of the plate and frame filter is collected, it is treated as an organic fertilizer.

[0025] 4. The effluent from the plate frame enters the activated carbon filter for filtration. The amount of granular activated carbon added to the activated carbon filter is 2 / 3 of the column height, and the filtration rate is 15 column volumes / h. Then it enters the bag filter for fine filtration.

[0026] 5. The water pressure difference between the in...

Embodiment 2

[0031] The wastewater treatment and reuse process of isomaltooligosaccharide production is as follows:

[0032] 1. 200 tons of production wastewater, measured initial conductivity 2620μs / cm, pH6.55, COD4000mg / L.

[0033] 2. Add 30mg / L of polyaluminum chloride and 12mg / L of polyaluminum sulfate, keep warm at 35°C for 30min, and then enter the plate frame for filtration.

[0034] 3. The pressure difference between the inlet and outlet of the plate and frame filter is 0.04MPa. After the filter residue of the plate and frame filter is collected, it will be treated as an organic fertilizer.

[0035] 4. The effluent from the plate frame enters the activated carbon filter for filtration. The amount of granular activated carbon added to the activated carbon filter is 1 / 2 column height, and the filtration rate is 12 column volumes / h. Then it enters the bag filter for fine filtration.

[0036] 5. Multi-core bag filter (8 cores) has a pressure difference of 0.04MPa between the inlet and...

Embodiment 3

[0041] Dextrin production wastewater treatment and reuse process is as follows:

[0042] 1. 220 tons of production wastewater, measured initial conductivity 3350μs / cm, pH 5.49, COD 4500mg / L, added sodium hydroxide to adjust the pH to 6.6.

[0043] 2. Add 25mg / L of polyaluminum chloride, 10mg / L of polyaluminum sulfate, and 0.1mg / L of polyacrylamide, keep warm at 35°C for 30min, and then enter the plate frame for filtration

[0044] 3. The pressure difference between the inlet and outlet water of the control plate and frame filter is 0.04MPa. After the filter residue of the plate and frame filter is collected, it is treated as an organic fertilizer.

[0045] 4. The effluent from the plate frame enters the activated carbon filter for filtration. The amount of granular activated carbon added to the activated carbon filter is 3 / 4 of the column height, and the filtration rate is 13 column volumes / h. Then it enters the bag filter for fine filtration.

[0046] 5. The pressure differe...

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Abstract

The invention provides a method for recovering waste water generated in the production of starch sugar. The recovered water can be used repeatedly. The method comprises the following steps of: neutralizing the waste water; performing flocculating sedimentation; filtering and removing residues by using a plate frame; decoloring by using granular active carbon; performing fine filtering by using a bag-type filter; performing ultrafiltration by using a hollow fiber membrane; and filtering by using a reverse osmosis membrane. The method is reasonable and easy to control automatically and is used for treating the waste water generated in the production of the starch sugar; 60 to 70 percent of discharged waste water can be recycled, and on the basis of 40 million tons of discharge of final water every year in the starch sugar industry, at least 24 million tons of water can be recovered every year, so that the economic benefit and social value are obvious while water resources are saved.

Description

technical field [0001] The invention relates to the field of starch sugar production wastewater treatment, in particular to a method for recycling starch sugar production wastewater. Background technique [0002] The starch sugar industry is a branch of the fermentation industry. It uses starch as raw material and undergoes deep processing derivatives of hydrolysis to varying degrees. It mainly includes glucose (syrup), maltose syrup, fructose syrup and various oligosaccharides and other starch sugar varieties. . At present, the annual output of starch sugar in my country is about 10 million tons, and with the addition of starch polysaccharide alcohols, it reaches about 12 million tons. It is estimated that by the end of 2012, the output of fructose syrup alone is expected to reach about 5 million tons, and the output of starch sugar will reach 5 million tons. A higher increase occurred. [0003] The starch sugar manufacturing industry consumes a lot of water resources. Wit...

Claims

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Application Information

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IPC IPC(8): C02F9/04
Inventor 刘宗利王乃强袁卫涛贾慧慧李方华
Owner BAOLINGBAO BIOLOGY
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