Treatment method of viscose zinc-containing wastewater

A treatment method and wastewater technology, applied in water/sewage treatment, neutralized water/sewage treatment, multi-stage water/sewage treatment, etc., can solve problems such as difficulty in filtering viscose zinc-containing wastewater and treatment of zinc-containing sludge

Active Publication Date: 2021-03-09
SATERI JIUJIANG FIBER CO LTD
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the deficiencies of the prior art, the purpose of the present invention is to provide a treatment method for viscose zinc-containing wastewater. The technical solution of the present invention can solve the difficulty in filtering viscose zinc-containing wastewater existing in the prior art and the use of inorganic flocculation Difficult post-treatment of zinc-containing sludge caused by the

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Treatment method of viscose zinc-containing wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The present embodiment provides a kind of preparation method of chitosan modified low-density hollow glass microspheres, comprising the following steps:

[0025] 1) preparation of chitosan acidic solution: adding chitosan to an aqueous solution of acetic acid with a mass concentration of 2% for dissolving to prepare a chitosan acidic solution with a mass concentration of chitosan of 3%, for subsequent use;

[0026] 2) Pickling pretreatment of glass microspheres: choose a density of 0.3g / cm 3 Low-density hollow glass microspheres were used as raw materials, soaked in 3% hydrochloric acid for 25 minutes, filtered, washed with water until the filtrate was neutral, and baked at 90°C for 2 days;

[0027] 3) Surface treatment of glass microspheres: add phenyltriethoxysilane to absolute ethanol, stir and mix evenly to prepare a silane coupling agent treatment solution with a mass concentration of 2.5% phenyltriethoxysilane, and pickle pretreatment Add the above-mentioned sila...

Embodiment 2

[0030] The present embodiment provides a kind of preparation method of chitosan modified low-density hollow glass microspheres, comprising the following steps:

[0031] 1) preparation of chitosan acidic solution: adding chitosan to an aqueous solution of acetic acid with a mass concentration of 3% for dissolving to prepare a chitosan acidic solution with a mass concentration of chitosan of 4%, for subsequent use;

[0032] 2) Pickling pretreatment of glass microspheres: choose a density of 0.4g / cm 3 Low-density hollow glass microspheres were used as raw materials, soaked in 3% hydrochloric acid for 20 minutes, filtered, washed with water until the filtrate was neutral, and baked at 80°C for 3 days;

[0033] 3) Surface treatment of glass microspheres: add phenyltriethoxysilane to absolute ethanol, stir and mix evenly to prepare a silane coupling agent treatment solution with a mass concentration of 3% phenyltriethoxysilane, and pickle pretreatment Add the above-mentioned silane...

Embodiment 3

[0036] A treatment method for viscose zinc-containing wastewater, comprising the following steps:

[0037] 1) Pretreatment: Viscose zinc-containing wastewater is pretreated by aeration and filtration to remove most of the sulfide and viscose fibers in the wastewater to treat the wastewater together;

[0038]2) Floating adsorption: After adjusting the pH of a treatment waste water to be 6.5 with a sodium hydroxide solution with a mass concentration of 40%, add the chitosan-modified low-density hollow glass microspheres prepared by the method of Example 1 to the waste water for adsorption, Among them, chitosan-modified low-density hollow glass microspheres are added according to the amount of 6g / L wastewater, slowly stirred and mixed, and then left to stand for 2.5 hours to remove the upper layer of floating matter to obtain secondary treated wastewater;

[0039] 3) Precipitation: Secondary wastewater treatment uses sodium hydroxide solution with a mass concentration of 40% to a...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
densityaaaaaaaaaa
Login to view more

Abstract

The invention relates to the technical field of wastewater treatment, in particular to a treatment method of viscose zinc-containing wastewater. The method comprises the following steps: 1) pretreatment: carrying out aeration and filtration pretreatment on the viscose zinc-containing wastewater to remove most sulfide and viscose in the wastewater to obtain primary treatment wastewater; 2) floatingadsorption: adjusting the pH value of the primary treatment wastewater to 6-7 by using alkali, then adding chitosan modified low-density hollow glass microspheres into the primary treatment wastewater for adsorption, mixing and standing for 2-3 hours, and removing upper-layer floaters to obtain secondary treatment wastewater; and 3) precipitation: adjusting the pH value of the filtrate of the secondary treatment wastewater to 7-10 with an alkali, then carrying out zinc ion precipitation again, and carrying out plate-frame filtration treatment on the precipitated wastewater to complete zinc-containing wastewater treatment. According to the technical scheme, the problems that in the prior art, viscose zinc-containing wastewater is difficult to filter, and zinc-containing sludge is difficultto post-treat due to the fact that inorganic flocculants are used can be solved.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a treatment method for viscose zinc-containing wastewater. Background technique [0002] The viscose zinc-containing wastewater mainly comes from the viscose forming section wastewater, which mainly contains sulfuric acid, sodium sulfate, cellulose, sulfide (mainly H2S, CS2, etc.) and zinc salts, and the zinc salts are mainly zinc sulfate and cellulose It exists in the form of zinc sulfonate. The existing technology is mainly by adjusting the pH and adding inorganic flocculants such as polyferric sulfate, so that the zinc ions are flocculated and precipitated and then filtered out. The hydration of zinc ions leads to very slow flocculation and precipitation of zinc ions, which makes the flocculation and filtration steps particularly difficult. In addition, the added inorganic flocculant introduces new iron ions, which makes the zinc content in the zinc-containing sl...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F101/20
CPCC02F9/00C02F1/001C02F1/66C02F1/285C02F1/62C02F1/56C02F2101/20
Inventor 姜术丹张彬王兵徐朝辉马驰高磊付敏波兰伟宝彭善俊张文涛
Owner SATERI JIUJIANG FIBER CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap