Advanced treatment process for degumming wastewater of ramie

A technology of advanced treatment and wastewater, applied in water/sewage treatment, natural water treatment, biological water/sewage treatment, etc., it can solve the problem of unsatisfactory effect of ramie degumming wastewater, reduce input, high COD removal rate, The effect of high chroma removal rate

Inactive Publication Date: 2019-07-16
SICHUAN JB RAMIE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the effect treatment of ramie degumming wastewater is not ideal

Method used

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  • Advanced treatment process for degumming wastewater of ramie
  • Advanced treatment process for degumming wastewater of ramie

Examples

Experimental program
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Effect test

Embodiment 1

[0020] The present embodiment provides a kind of ramie degumming wastewater advanced treatment process, comprising:

[0021] (1) Using sulfuric acid to adjust the pH of the scouring wastewater to 3; then adding 1.5% bio-enzyme by weight of the scouring wastewater and reacting at 43°C for 3 hours. Biological enzymes include pectinase, hemicellulase and xylanase with a mass ratio of 1:2:1.5, and are filtered to obtain the first treatment liquid;

[0022] (2) Add ferrous sulfate and hydrogen peroxide to the first treatment liquid for treatment. The amount of ferrous salt added is 1‰ of the weight of the first treatment solution; the amount of hydrogen peroxide added is 2‰ of the weight of the first treatment solution, treated for 60 minutes, and filtered to obtain the second treatment solution;

[0023] (3) Add quicklime to the second treatment solution. The addition of unslaked lime is 4‰ of the first treatment liquid, leave standstill after stirring, and take the supernatant;...

Embodiment 2

[0026] The present embodiment provides a kind of ramie degumming wastewater advanced treatment process, comprising:

[0027] (1) Using sulfuric acid to adjust the pH of the scouring wastewater to 5; then adding 2% bio-enzyme by weight of the scouring wastewater and reacting at 52° C. for 3 hours. Biological enzymes include pectinase, hemicellulase and xylanase with a mass ratio of 2:3:2, and are filtered to obtain the first treatment solution;

[0028] (2) Add ferrous sulfate and hydrogen peroxide to the first treatment liquid for treatment. The addition of ferrous salt is 8‰ of the weight of the first treatment solution; the addition of hydrogen peroxide is 4‰ of the weight of the first treatment solution, and the treatment is 80min, and the second treatment solution is obtained by filtration;

[0029] (3) Add quicklime to the second treatment liquid. The addition of unslaked lime is 12‰ of the first treatment liquid, leave standstill after stirring, and take the supernatan...

Embodiment 3

[0032] The present embodiment provides a kind of ramie degumming wastewater advanced treatment process, comprising:

[0033] (1) Using sulfuric acid to adjust the pH of the scouring wastewater to 4; then adding 1.8% bio-enzyme by weight of the scouring wastewater and reacting at 50°C for 2.5 hours. Biological enzymes include pectinase, hemicellulase and xylanase with a mass ratio of 1.5:2.5:1.8, and are filtered to obtain the first treatment solution;

[0034] (2) Add ferrous sulfate and hydrogen peroxide to the first treatment liquid for treatment. The addition of ferrous salt is 5‰ of the weight of the first treatment solution; the addition of hydrogen peroxide is 3‰ of the weight of the first treatment solution, and the treatment is 70min, and the second treatment solution is obtained by filtration;

[0035] (3) Add quicklime to the second treatment liquid. The addition of unslaked lime is 8‰ of the first treatment liquid, leave standstill after stirring, and take the sup...

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Abstract

The invention belongs to the technical field of wastewater treatment, and provides an advanced treatment process for degumming wastewater of ramie. The method comprises the following steps: (1) adjusting a pH value of scouring wastewater, then adding biological enzymes into the scouring wastewater, carrying out a reaction, wherein the biological enzymes comprise pectinase, hemicellulase and xylanase, and carrying out filtering so as to obtain a first treated solution; (2) adding ferrous salt and hydrogen peroxide into the first treated solution for treatment, and carrying out filtering so as to obtain a second treated solution; (3) adding quicklime into the second treated solution, and carrying out stirring and standing so as to obtain a supernatant; and (4) mixing the supernatant with filtered wastewater, adding a flocculating agent, carrying out flocculation, then carrying out filtering, successively allowing obtained filtrate to enter a hydrolysis acidification pool, an anaerobic pool and an aerobic pool for treatment, then carrying out adsorption with an adsorbent, and carrying out filtering so as to obtain treated water. The process provided by the invention can significantlyreduce the content of pollutants in the degumming wastewater of the ramie, especially the scouring wastewater, so the degumming wastewater of the ramie can reach national first-level discharge standards after treatment.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to an advanced treatment process for ramie degumming wastewater. Background technique [0002] During the degumming process of ramie, waste water will be generated in each treatment stage, among which the cooking waste water is the most difficult to treat. The amount of smelting wastewater is large and strongly alkaline, with an alkali concentration of about 0.3%. The wastewater is dark brown and has a high concentration of organic pollutants. Both BOD and COD are as high as thousands of milligrams per liter. In the prior art, the effective treatment of ramie degumming wastewater is not ideal. Contents of the invention [0003] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a kind of ramie degumming wastewater advanced treatment process, which can significantly reduce the pollutant content ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F103/34
CPCC02F1/281C02F1/283C02F1/5236C02F1/722C02F3/30C02F3/342C02F9/00C02F2103/34
Inventor 张小祝别晓东杨继前李文成王惠廖光辉
Owner SICHUAN JB RAMIE
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