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Environment-friendly flocculating agent and application thereof

A flocculant, environmentally friendly technology, applied in the direction of flocculation/sedimentation water/sewage treatment, water/sludge/sewage treatment, water/sewage treatment, etc., can solve the problem of unreasonable treatment methods for solid residues, waste of nutrients, and difficult to clean and other problems, to achieve the effect of controllable product quality, reducing impurities, and saving the amount of flocculant

Active Publication Date: 2022-02-08
SHANDONG JINYANG PHARMA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] With the development of industry, more and more industrial wastewater is produced, and the environmental pollution caused by industrial wastewater is becoming more and more serious. The flocculation method is the most widely used sewage treatment method. The flocculation method has the advantages of high efficiency and low cost. The flocculation process starts The main function is the flocculant, and the most widely used flocculants are mainly inorganic flocculants (such as polyaluminum chloride) and synthetic organic flocculants (such as polyacrylamide), although these flocculants have high flocculation activity and low cost, but These flocculants have certain toxicity and are difficult to degrade. Extensive use will bring secondary pollution and cause new environmental and human health problems. The solid residue obtained after flocculation and precipitation has no reasonable treatment.
[0003] Fermentation, washing and other processes in the soybean product industry will produce a large amount of high-turbidity and turbid wastewater, which contains a large amount of oxidizable organic matter and cannot be directly discharged, but it also means that it is rich in protein, amino acids, vitamins, inorganic Nutrients such as salt have huge resource utilization value. However, in the existing wastewater treatment methods of soybean products industry, the flocculation treatment method adopted will introduce a large amount of heavy metals or toxic monomers, which is not only difficult to clean, but also causes a large amount of nutrients. Material waste, there is an urgent need for an environmentally friendly flocculant that is non-toxic, harmless, degradable, has no secondary pollution, and has huge resource utilization value

Method used

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  • Environment-friendly flocculating agent and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] A kind of dextran-citric acid anion type environment-friendly flocculant, the preparation method adopts the following steps:

[0035]1) Use acetic acid-calcium acetate buffer solution with pH=5.4 to prepare 0.58mol / L sucrose solution, add dextran sucrase enzyme solution to it, and the enzyme concentration is 5.0U / mL; carry out enzyme catalysis in a shaker at 25°C and 100rpm The reaction was carried out for 24 hours; the kinetic viscosity reached 9000CPS at the end of the reaction; the high-molecular-weight dextran product was precipitated with ethanol and washed twice, and then dried in a constant temperature blast oven at 40°C; the high-molecular-weight dextran product was dried and ground to obtain a high molecular weight Dextran solid powder;

[0036] 2) Prepare high molecular weight dextran solution and citric acid solution, adjust the pH value of citric acid solution to 7.5 with sodium hydroxide solution, mix and stir with dextran solution for 5 minutes, the concen...

Embodiment 2

[0038] A dextran-citric acid anion-type environmentally friendly flocculant, on the basis of Example 1, in step 2), the dextran concentration is set to 50g / L in the mixed solution, and the final molar ratio of citric acid to dextran anhydroglucose units is 1:1, other The conditions are the same as in Example 1.

Embodiment 3

[0040] A dextran-citric acid anion-type environmentally friendly flocculant, on the basis of Example 1, in step 2), the dextran concentration is set to 10g / L in the mixed solution, and the final molar ratio of citric acid to dextran anhydroglucose units is 0.1:1, and other The conditions are the same as in Example 1.

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Abstract

An environment-friendly flocculant and application thereof belong to the technical field of environment-friendly flocculants. At present, the most widely applied flocculants are mainly inorganic flocculants (such as polyaluminum chloride) and synthetic organic flocculants (such as polyacrylamide), the flocculants have certain toxicity and are difficult to degrade, secondary pollution can be caused when the flocculants are widely used, and waste residues cannot be treated. The invention provides an environment-friendly flocculating agent which is non-toxic, harmless, free of secondary pollution and good in performance and application of the environment-friendly flocculating agent. The main component of the environment-friendly flocculating agent is a dextran-citric acid anionic polymer. The preparation method comprises the following steps of: adjusting the pH value of a citric acid solution to 7-9 by using sodium hydroxide, well mixing and stirring the citric acid solution with a dextran solution, adding 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride, and reacting for 12-36 hours, the molar ratio of edc to citric acid being (1-2): 1; and adding ethanol for precipitation, and washing and drying the precipitate to obtain the flocculant. Soybean meal waste liquid can be used for livestock breeding after being flocculated, the preparation is simple, and the efficiency is high.

Description

technical field [0001] An environment-friendly flocculant and application thereof belong to the technical field of environment-friendly flocculants. Background technique [0002] With the development of industry, more and more industrial wastewater is produced, and the environmental pollution problem caused by industrial wastewater is becoming more and more serious. The flocculation method is the most widely used sewage treatment method. The flocculation method has the advantages of high efficiency and low cost. The main function is flocculant. The most widely used flocculants at present are mainly inorganic flocculants (such as polyaluminum chloride) and synthetic organic flocculants (such as polyacrylamide). Although these flocculants have high flocculation activity and low cost, but These flocculants have certain toxicity and are difficult to degrade. Widespread use will bring about secondary pollution and cause new environmental and human health problems. There is no rea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/56C02F1/52C08B37/02
CPCC02F1/56C02F1/5263C08B37/0021
Inventor 魏哲张洪斌吕厚臣陈鑫鑫
Owner SHANDONG JINYANG PHARMA
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