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Treatment method for recycling potato starch production factory wastewater

A technology for the production of wastewater and potato starch, which is applied in wastewater treatment during processing, chemical instruments and methods, neutralized water/sewage treatment, etc., can solve problems such as high operating costs, waste of resources, substandard effluent, etc., and achieve operating costs Low, meet the requirements of engineering, the effect of stable water quality

Inactive Publication Date: 2012-09-26
山东博洋环境资源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problems of resource waste, substandard effluent and high operating cost in the starch wastewater treatment process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0028] Example 1: Wastewater treatment of sweet potato starch processing production with sweet potato as raw material

[0029] During sweet potato processing, 40 tons / hour (COD concentration of 15,000 mg / L) of starch wastewater from sweet potato processing in the production workshop enters sedimentation tank 1. The designed residence time of sedimentation tank 1 is 5 hours. The starch in the high-concentration starch wastewater can be fully precipitated and separated. The effluent from pool 1 (COD concentration is 12000mg / L) enters the acid precipitation tank and the alkali precipitation tank (the designed residence time of the acid and alkali precipitation tank is 3 hours) in turn to carry out protein precipitation and separation. Production raw materials, the recovery rate is 100 kg per ton of wastewater (the moisture content is less than 10% dry product), and the alkali precipitation effluent (COD concentration is 8000 mg / L) is heated up by the heat exchange system (the temp...

example 2

[0030] Example 2: Wastewater treatment from cassava starch processing with cassava as raw material

[0031]20 tons / hour of cassava starch processing wastewater in the production workshop (COD concentration is 6000mg / L) enters sedimentation tank 1 (residence time 5 hours), and starch in high-concentration starch wastewater can be fully precipitated and separated. The effluent of sedimentation tank 1 (COD concentration of 5000mg / L) into the acid precipitation tank and the alkali precipitation tank (the residence time of the acid and alkali precipitation tank is 3 hours) to carry out protein precipitation and separation, and the precipitated protein is used as raw material after sludge dehydration and drying, and the recovery rate is per ton 120 kg of waste water (water content less than 10% dry product), alkali precipitation effluent (COD concentration of 8000mg / L) and then heated by the heat exchange system (temperature increased from 20oC to 35oC) into the UASB anaerobic reacto...

example 3

[0032] Example 3: Wastewater treatment from potato starch processing with potato as raw material

[0033] Potato starch processing wastewater 20 tons / hour (COD concentration is 10000mg / L) enters sedimentation tank 1 (residence time is 5 hours), and starch in high-concentration starch wastewater can be fully precipitated and separated, and sedimentation tank 1 effluent (COD concentration is 9000mg / L) L) Enter the acid precipitation tank and the alkali precipitation tank in turn (the residence time of the acid and alkali precipitation tank is 3 hours) to carry out protein precipitation and separation, and the precipitated protein is used as the raw material for deep processing products after dehydration and drying of the sludge. The recovery rate is per ton of wastewater 110kg (dry product with moisture content less than 10%), alkali precipitation effluent (COD concentration is 6000mg / L) and then heated by heat exchange system (temperature increased from 20oC to 35oC) into ASB...

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Abstract

The invention discloses a treatment method for recycling potato starch production factory wastewater, relating to the technical field of starch wastewater treatment. The method comprises the following steps: precipitating, regulating the pH value of the precipitate with acid, regulating the pH value of the precipitate with alkali, exchanging and recycling heat, carrying out anaerobic treatment, aerobic biochemical treatment and ultrafiltration membrane treatment, and detecting emissions. The COD (chemical oxygen demand) of the wastewater treated by the method is less than 50 mg / L, the chroma removal rate of the wastewater is not lower than 99%, and the water quality chroma index is lower than 10 times. The invention has the advantages of low treatment cost, high operation stability and high treatment efficiency, can generate additional economic benefits, and is suitable for wide popularization.

Description

technical field [0001] The invention relates to the technical field of starch wastewater treatment, in particular to a resource treatment method for potato starch production wastewater. Background technique [0002] Classified according to the source of starch raw materials, potato starch can be divided into tapioca starch, sweet potato starch, potato starch and other varieties, and potato starch processing wastewater has common characteristics. [0003] Sweet potatoes, also known as sweet potatoes and sweet potatoes, are perishable and should not be stored for a long time. The deep processing of sweet potatoes can solve the phenomenon of a large number of rotten potatoes caused by improper storage of fresh potatoes. The refined starch of sweet potatoes can be processed at different depths to produce hundreds of valuable chemical products. The value-added is about 10-30 times, and the prospect is promising. The market potential is huge. However, the production of sweet pot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F11/12C02F1/66C02F3/30C02F103/26
Inventor 杨云军田雪辉吕庆香
Owner 山东博洋环境资源有限公司
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