A kind of protein treatment method in potato starch production wastewater

A potato starch and production wastewater technology, which is applied in food industry wastewater treatment, flocculation/sedimentation water/sewage treatment, water/sewage treatment, etc., can solve problems such as high cost, unstable operation, complicated process, etc., and achieve extraction utilization rate Improve and ensure the effect of protein precipitation and efficient use of waste

Active Publication Date: 2018-08-24
GUANGDONG HINAPHARM PHARMA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods have disadvantages such as high cost, incomplete treatment, complicated process, and unstable operation, which brings inconvenience to the popularization and application of the project.

Method used

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  • A kind of protein treatment method in potato starch production wastewater

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A. Filter the yellow slurry water produced by the potato starch processing plant through a 50-mesh filter, take 1L of waste water, and adjust the pH to about 4~5 with hydrochloric acid;

[0030] B, urea, polyacrylamide, CaCl 2 According to the ratio of 13mg, 8mg, 5mg, make a mixed solution, add it to 1L waste water, stir slowly for 1~2 minutes, and let it stand for 1 hour.

[0031] C. Add polyaluminum chloride at a concentration of 500mg / L, stir slowly, let stand for 1 hour, and take out the supernatant;

[0032] D. The precipitate is dehydrated, spray-dried and crushed to obtain a high value-added crude protein by-product.

Embodiment 2

[0034] A. Filter the yellow slurry water produced by the potato starch processing plant through a 100-mesh filter, take 1L of waste water, and adjust the pH to about 4~5 with glacial acetic acid;

[0035] B, urea, polyacrylamide, CaCl 2 According to the ratio of 15mg, 10mg, 6mg, make a mixed solution, add it to 1L waste water, stir slowly for 1~2 minutes, and let it stand for 1 hour.

[0036] C. Add polyaluminum chloride at a concentration of 500mg / L, stir slowly, let stand for 1 hour, and take out the supernatant;

[0037] D. The precipitate is dehydrated, spray-dried and crushed to obtain a high value-added crude protein by-product.

Embodiment 3

[0039] A. Filter the yellow slurry water produced by the potato starch processing plant through a 200-mesh filter, take 1L of waste water, and adjust the pH to about 4~5 with glacial acetic acid;

[0040] B, urea, polyacrylamide, CaCl 2 According to the ratio of 18mg, 13mg, 7mg, make a mixed solution, add it to 1L wastewater, stir slowly for 1~2 minutes, and let it stand for 1 hour.

[0041] C. Add polyaluminum chloride at a concentration of 500mg / L, stir slowly, let stand for 1 hour, and take out the supernatant;

[0042] D. The precipitate is dehydrated, spray-dried and crushed to obtain a high value-added crude protein by-product.

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Abstract

The invention relates to a protein extraction process, and in particular, relates to a method for processing proteins in potato starch production wastewater. The method can perform extraction treatment on cleaning wastewater, sieving washing water, potato washing water and other various waste yellow serofluid, the waste yellow serofluid extraction utilization rate is increased significantly, an acid is added in the yellow serofluid so as to make the pH value decreased, and then a compound agent a is added to make colloidal-state proteins in the yellow serofluid to form flocs to be precipitated; after static precipitation is carried out for 1 h, a compound agent b is added, and then static precipitation is carried out for 1 h, so that the separation effect can be improved, and protein precipitation is ensured. The extraction rate of separation and extraction of the proteins in the wastewater reaches 90% or more. Through detection, the waste yellow serofluid treated by the method has the chemical oxygen demand COD of 0.027% that of waste yellow serofluid with the same volume, and has the biochemical oxygen demand BOD5 of 0.041% that of the waste yellow serofluid with the same volume, so as to fully reach national second-class water discharge standards.

Description

technical field [0001] The invention relates to a protein extraction process, in particular to a protein treatment method in potato starch production wastewater. Background technique [0002] Potatoes are an important raw material for the production of starch. There are thousands of potato starch processing plants in my country, and there are generally technical problems in wastewater treatment. The potato starch processing process produces a large amount of high-concentration organic wastewater containing starch and protein, which can be divided into potato washing wastewater and yellow pulp water according to the production process. Potato washing wastewater can be recycled through simple three-stage precipitation, while yellow slurry water contains a large amount of organic matter such as starch and protein. This wastewater is generally non-toxic and has good biochemical properties, but the discharge volume is large. The production of 1 ton of potato starch can produce 7...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F103/32
CPCC02F1/001C02F1/5236C02F1/56C02F1/66C02F9/00C02F2103/32
Inventor 周玉岩陶蕾梁剑平
Owner GUANGDONG HINAPHARM PHARMA CO LTD
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