Method for treating yellow slurry wastewater of corn starch

A corn starch and wastewater treatment technology, applied in microorganism-based methods, biochemical equipment and methods, microorganisms, etc., can solve the problems of waste of resources, single recyclables, high cost, reduce raw material costs, solve insufficient production capacity, improve The effect of industry economic and environmental benefits

Inactive Publication Date: 2017-09-26
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, using physical and chemical methods to treat corn yellow slurry water is not only difficult, high cost, poor economic benefit, single recyclables, but also causes a great waste of resources

Method used

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  • Method for treating yellow slurry wastewater of corn starch
  • Method for treating yellow slurry wastewater of corn starch
  • Method for treating yellow slurry wastewater of corn starch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A method for the treatment of cornstarch yellow slurry wastewater, comprising the following steps:

[0046] 1) Place cornstarch yellow pulp wastewater under anaerobic conditions for 10-15 days for natural fermentation, ferment treatment until the pH value is below 3, and then filter the fermented wastewater with a 150-200 mesh filter to obtain clarification filtrate;

[0047] 2) Pack the column with polyamine-based weakly basic ion-exchange resin, pass the clarified filtrate through the column, and collect the column liquid; wherein, the volume ratio of the polyamine-based weakly basic ion-exchange resin to the clarified filtrate is 1:7 ;Flow rate: pass 0.5mL of clarified filtrate per gram of polyamine-based weakly basic ion exchange resin per minute, the exchange capacity is 1:6; then, add 1:8 dilution of hydrochloric acid, the amount is 2 times the amount of resin, soak for 10~ For 20 minutes, wash with 6-8 times the amount of resin in deionized water; neutralize the...

Embodiment 2

[0052] Example 1

[0053] A method for the treatment of cornstarch yellow slurry wastewater, comprising the following steps:

[0054] 1) Insert lactic acid bacteria (Lactobacillus bulgaricus or Streptococcus thermophilus) into cornstarch yellow slurry wastewater under anaerobic conditions, the temperature is normal temperature, and the fermentation time is 3 to 5 days. The waste water after fermentation treatment is filtered with a 150-200-mesh filter screen to obtain a clarified filtrate;

[0055] 2) Pack the column with polyamine-based weakly basic ion-exchange resin, pass the clarified filtrate through the column, and collect the column liquid; wherein, the column volume ratio of the polyamine-based weakly basic ion-exchange resin to the clarified filtrate is 1:7.5 ;Flow rate: pass 0.8mL of clarified filtrate per gram of polyamine-based weakly basic ion exchange resin per minute, and the exchange capacity is 1:7; then, add 1:8 dilution of hydrochloric acid, the amount is 2...

Embodiment 3

[0060] A method for the treatment of cornstarch yellow slurry wastewater, comprising the following steps:

[0061] 1) Introduce cornstarch yellow pulp wastewater into lactic acid bacteria (Lactobacillus bulgaricus or Streptococcus thermophilus) under anaerobic conditions, the temperature is 40-44°C, the fermentation time is 1-2 days, and the fermentation process is carried out until the pH value is below 3 , and then filter the waste water after fermentation treatment with a filter screen of 150 to 200 meshes to obtain a clarified filtrate;

[0062] 2) Pack the column with polyamine-based weakly basic ion-exchange resin, pass the clarified filtrate through the column, and collect the column liquid; wherein, the column volume ratio of the polyamine-based weakly basic ion-exchange resin to the clarified filtrate is 1:7.5 ;Flow rate: pass 0.8mL of clarified filtrate per gram of polyamine-based weakly basic ion exchange resin per minute, and the exchange capacity is 1:7; then, add...

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Abstract

The invention discloses a method for treating yellow slurry wastewater of corn starch, and belongs to the technical field of wastewater treatment. The method comprises the following steps: 1) performing fermentation treatment on the yellow slurry wastewater of the corn starch until the pH (Potential of Hydrogen) value is 3 or below; filtering to obtain clarified filtrate; 2) enabling the clarified filtrate to pass through a column and treating, and collecting a column passing solution; 3) by taking the column passing solution as a basic culture medium, adding acetobacter xylinum into the basic culture medium; after performing constant-temperature fermentation, collecting a fermentation residual solution; taking out a bacterial cellulose membrane; washing the bacterial cellulose membrane, removing impurities and immersing; 4) adding quick lime into the fermentation residual solution, and precipitating protein; filtering the protein to obtain crude protein and collecting filtrate; 5) adding quick lime into the filtrate, and standing and precipitating to prepare crude calcium lactate; or enabling the filtrate to pass through anion exchange resin, and eluting with hot water to prepare a lactic acid solution. By adopting the method disclosed by the invention, a series of byproducts with high additional value can be produced; meanwhile, the aim of treating the wastewater is realized; the removal rates of BOD5 (Biochemical Oxygen Demand 5) and CODCr (Chemical Oxygen Demand Cr) in the yellow slurry wastewater reach about 98.9 percent and 97.6 percent respectively.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and relates to the discharge reduction treatment and recycling of corn starch yellow slurry water, in particular to a method for treating corn starch yellow slurry wastewater. Background technique [0002] As an important raw material in today's industry, starch has a wide range of applications, involving food, chemical, textile, pharmaceutical and other industries. China is the second largest starch producer in the world, second only to the United States, of which corn starch accounts for the highest proportion. According to Futures Daily, in 2013, the world's starch production was about 68.8 million tons, of which corn starch accounted for 89% of the total. The proportion is 94%, and the remaining 6% of the starch comes from potato starch, wheat starch, etc. With the rapid development of global industrialization, there are huge business opportunities and economic interests in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P39/00C12P19/04C12P9/00C12P7/56C12P21/00C12R1/02C12R1/225C12R1/46
CPCC12P7/56C12P9/00C12P19/04C12P21/00C12P39/00
Inventor 丁勇
Owner SHAANXI UNIV OF SCI & TECH
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