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Treatment method for starch processing waste water

A starch processing and treatment method technology, applied in the direction of water/sewage multi-stage treatment, water/sludge/sewage treatment, centrifugal separation water/sewage treatment, etc., can solve the problems of high starch content, environmental pollution, and biochemical oxygen consumption value Higher problems, to achieve the effect of reducing starch content

Active Publication Date: 2015-07-01
WUJIANG HUACHENG COMPOSITE MATERIAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved: the biochemical oxygen consumption value in the starch processing wastewater is high, the starch content is high, and the direct discharge will cause certain environmental pollution problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] A method for treating starch processing wastewater, the processing steps are as follows: (1) heating the starch processing wastewater to a temperature of 55°C, and adding citric acid solution to the starch processing wastewater after the temperature is stable, the citric acid solution is 4.5% of the total weight of the starch processing wastewater wt%, the citric acid solution concentration is 10wt%; (2) stir evenly after adding the citric acid solution, the mixed solution is centrifuged, the centrifuge speed is 5000rpm, and the centrifugation time is 20min; (3) remove the precipitate and keep the supernatant , add S8 type macroporous adsorption resin to the supernatant, the total amount of S8 resin added is 2.6wt% of the total weight of the supernatant, and stir for 2h after adding; (4) centrifuge the resin and the solution, the centrifugal speed is 1500rpm, the centrifugation time (5) pass the solution through an organic membrane with a molecular weight of 300, and col...

Embodiment 2

[0013] A method for treating starch processing wastewater, the processing steps are as follows: (1) heating the starch processing wastewater to a temperature of 55°C, and adding citric acid solution to the starch processing wastewater after the temperature is stable, the citric acid solution is 4.0% of the total weight of the starch processing wastewater wt%, the citric acid solution concentration is 10wt%; (2) stir evenly after adding the citric acid solution, the mixed solution is centrifuged, the centrifuge speed is 5000rpm, and the centrifugation time is 25min; (3) remove the precipitate and keep the supernatant , add S8 type macroporous adsorption resin to the supernatant, the total amount of S8 resin added is 3.1wt% of the total weight of the supernatant, and stir for 2h after adding; (4) centrifuge the resin and the solution, the centrifugal speed is 1500rpm, the centrifugation time (5) pass the solution through an organic membrane with a molecular weight of 300, and col...

Embodiment 3

[0015] A method for treating starch processing wastewater, the processing steps are as follows: (1) heating the starch processing wastewater to a temperature of 55°C, and adding a citric acid solution to the starch processing wastewater after the temperature is stable, the citric acid solution is 3.5% of the total weight of the starch processing wastewater wt%, the citric acid solution concentration is 10wt%; (2) stir evenly after adding the citric acid solution, the mixed solution is centrifuged, the centrifuge speed is 5000rpm, and the centrifugation time is 23min; (3) remove the precipitate and keep the supernatant , add S8 type macroporous adsorption resin to the supernatant, the total amount of S8 resin added is 2.9wt% of the total weight of the supernatant, and stir for 2h after adding; (4) centrifuge the resin and the solution, the centrifugal speed is 1500rpm, the centrifugation time (5) pass the solution through an organic membrane with a molecular weight of 300, and c...

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PUM

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Abstract

The invention relates to a treatment method for starch processing waste water. The method comprises the following steps: (1) heating the starch processing waste water to 55 DEG C, adding citric acid solution into the starch processing waste water after the temperature is stable, wherein the citric acid solution is 3.5 to 4.5wt% of the total weight of the starch processing waste water, and the concentration of the citric acid solution is 10wt%; (2) uniformly stirring the starch processing waste water after the citric acid solution is added, and centrifuging the mixed solution, wherein the rotation speed of a centrifuge is 5000rpm, and the centrifuging time is 20 to 25 minutes; (3) removing the precipitates, maintaining the supernatant, adding S8-type macroporous adsorption resin into the supernatant, wherein the addition quantity of the S8 resin accounts for 2.6 to 3.1wt% of the total weight of the supernatant, and stirring the mixture for 2h after the S8 resin is added; (4) centrifugally separating the resin from solution, wherein the centrifuging rotation speed is 1500rpm, the centrifuging time is 10min; and collecting the solution; (5) enabling the solution to pass through an organic membrane with the molecular weight of 300, and collecting the solution passing the organic membrane, wherein the collected solution is the treated starch processing waste water. The content of the starch in the treated starch processing waste water is reduced from 478g / L to 17mg / L to 24mg / L, and BOD (biochemical oxygen demand) value is reduced from 643mg / L to 45mg / L to 53mg / L.

Description

technical field [0001] The invention relates to a wastewater treatment method, in particular to a starch processing wastewater treatment method. Background technique [0002] Starch is a product with a very large amount of use and is widely used in agriculture, industry, food and other fields. During the starch extraction process and the modified starch preparation process, a large amount of starch wastewater will be produced. These wastewaters have two important characteristics. The first is that the starch content is very high, and some can be as high as 1000mg / L. The second is the higher value of biochemical oxygen consumption. The starch wastewater is treated by physical adsorption to reduce the biochemical oxygen consumption value and starch content value, which can improve the water quality of starch wastewater and meet the corresponding discharge standards. Contents of the invention [0003] The technical problem to be solved: the biochemical oxygen consumption va...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F1/38C02F1/44
Inventor 倪迪
Owner WUJIANG HUACHENG COMPOSITE MATERIAL SCI & TECH