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Method for coagulation treatment of ultrasonic pulping wastewater by using cellulose-based green flocculation material

A pulping wastewater and ultrasonic technology, applied in the field of environmental engineering, can solve the problems of secondary pollution, difficult treatment, large amount of wastewater, etc., achieve the effects of reducing treatment costs, accelerating the process of industrialization, and improving the removal rate of turbidity

Inactive Publication Date: 2017-03-01
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to overcome the problems of large amount of wastewater produced in the process of ultrasonic pulping and difficult treatment, solve the secondary pollution of traditional flocculation sludge, reduce the production cost of the flocculation process, and utilize the abundant cellulose biomass resources in my country, the present invention The purpose is to provide a method of using cellulose-based green flocculation material to coagulate ultrasonic pulping wastewater

Method used

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  • Method for coagulation treatment of ultrasonic pulping wastewater by using cellulose-based green flocculation material
  • Method for coagulation treatment of ultrasonic pulping wastewater by using cellulose-based green flocculation material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1) Add cellulose-based green flocculation material to tap water to prepare a 3 wt% cellulose-based green flocculation material solution;

[0020] 2) Add coagulant polyaluminum chloride to tap water to prepare a polyaluminum chloride coagulant solution with a mass fraction of 4 wt%.

[0021] 3) Use 2 mol / L hydrochloric acid to adjust the pH value of wheat straw ultrasonic pulping wastewater to 4, and add the polyaluminum chloride coagulant solution prepared in step 2) to the above-mentioned adjusted In the wheat straw ultrasonic pulping wastewater with a pH value, stir at 150 rpm for 5 min, and then add the cellulose-based green flocculation material solution prepared in step 1) into the above-mentioned wheat straw ultrasonic pulping at a dosage of 10 mL / L In the wastewater, stir at 20 rpm for 9 minutes to obtain a mixed solution of wheat straw ultrasonic pulping wastewater with coagulation aids and flocculation materials added;

[0022] 4) The mixed solution of wheat s...

Embodiment 2

[0024] 1) Add cellulose-based green flocculation material to tap water to prepare a 3 wt% cellulose-based green flocculation material solution;

[0025] 2) Add the coagulant aid polymeric ferric chloride to tap water to prepare a polymeric ferric chloride coagulant aid solution with a mass fraction of 4 wt%.

[0026] 3) Use 2 mol / L hydrochloric acid to adjust the pH value of rice straw ultrasonic pulping wastewater to 5, and add the polyferric chloride coagulant solution prepared in step 2) to the above adjusted In the rice straw ultrasonic pulping wastewater with a pH value, stir at 250 rpm for 6 min, and then add the cellulose-based green flocculation material solution prepared in step 1) to the above-mentioned rice straw ultrasonic pulping at a dosage of 70 mL / L In the wastewater, stir at 50 rpm for 10 min to obtain a mixed solution of rice straw ultrasonic pulping wastewater with coagulation aids and flocculation materials added;

[0027] 4) The mixed solution of rice str...

Embodiment 3

[0029] 1) Add cellulose-based green flocculation material to tap water to prepare a 3 wt% cellulose-based green flocculation material solution;

[0030] 2) Add polyaluminum ferric chloride as a coagulant aid to tap water to prepare a polyaluminum ferric chloride coagulant aid solution with a mass fraction of 4 wt%.

[0031] 3) Use 2 mol / L hydrochloric acid to adjust the pH value of reed ultrasonic pulping wastewater to 6, and add the polyaluminum ferric chloride coagulant solution prepared in step 2) to the above-mentioned adjusted In the reed ultrasonic pulping wastewater with a pH value, stir at 190 rpm for 7 minutes, and then add the cellulose-based green flocculation material solution prepared in step 1) to the above reed ultrasonic pulping wastewater at a dosage of 40 mL / L , stirred at 40 rpm for 12 min to obtain a mixed solution of reed ultrasonic pulping wastewater with coagulation aids and flocculation materials added;

[0032] 4) Put the reed ultrasonic pulping waste...

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Abstract

The present invention discloses a method for coagulation treatment of ultrasonic pulping wastewater by using a cellulose-based green flocculation material. The method is characterized in that ultrasonic pulping wastewater is adjusted to achieve a corresponding pH value, an appropriate amount of a coagulant aid is added and rapid stirring is performed, an appropriate amount of a cellulose-based green flocculation material is added and slow stirring is performed, and the suspended and slightly-soluble contaminants in the wastewater are removed through standing overflow. According to the present invention, the method is rapid and efficient, and is especially suitable for the coagulation treatment of the ultrasonic pulping wastewater; and the ultrasonic pulping wastewater is treated by using the novel cellulose-based green flocculation material so as to significantly improve the wastewater turbidity removal rate, reduce the treatment cost, reduce the secondary environment pollution caused by the flocculation sludge, further improve the wastewater treatment technology during the ultrasonic pulping process, accelerate the industrialization of the ultrasonic pulping technology, and provide the important social and environmental benefits and the industrial application values compared to the traditional polyacrylamide type flocculant.

Description

technical field [0001] The invention relates to a method for coagulation treatment of ultrasonic pulping wastewater, in particular to a method for coagulation treatment of ultrasonic pulping wastewater by using cellulose-based green flocculation materials, which belongs to the technical field of environmental engineering. Background technique [0002] Cellulose is a macromolecular polysaccharide composed of glucose units, which is one of the most abundant natural polymer compounds on the earth; polyacrylamide is a water-soluble linear polymer compound with good flocculation performance, but the sludge generated during the flocculation process is landfilled It is difficult to degrade naturally in the soil. The cellulose-based green flocculation material prepared by grafting polyacrylamide cellulose has the characteristics of two kinds of polymer compounds, which not only has good flocculation performance, but also can be biodegraded by soil; in addition, it can further reduce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F1/56C02F1/52
Inventor 姚菊明俞钱涵张勇高张昀
Owner ZHEJIANG SCI-TECH UNIV
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