Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for oxidative degradation of sulfide in industrial wastewater through combined hydrogen peroxide-bleaching powder

A technology of oxidative degradation and industrial wastewater, applied in chemical instruments and methods, oxidized water/sewage treatment, water pollutants, etc., can solve the problems of high process cost, hidden safety hazards in transportation and storage, and achieve easy availability of raw materials and easy operation. , the effect of large processing capacity

Inactive Publication Date: 2020-09-18
NORTHWEST RES INST OF MINING & METALLURGY INST
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to provide a method for oxidizing and degrading sulfide in industrial wastewater by using hydrogen peroxide-bleaching powder to solve the problems of high process cost and high safety hazards in transportation and storage in the hydrogen peroxide oxidation method

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
  • Method for oxidative degradation of sulfide in industrial wastewater through combined hydrogen peroxide-bleaching powder
  • Method for oxidative degradation of sulfide in industrial wastewater through combined hydrogen peroxide-bleaching powder
  • Method for oxidative degradation of sulfide in industrial wastewater through combined hydrogen peroxide-bleaching powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A method utilizing hydrogen peroxide-bleaching powder to jointly oxidize and degrade sulfides in industrial wastewater, the method comprising the following steps:

[0035] Step 1: Take 1L of industrial waste water (hereinafter referred to as waste water), add it into a reactor with heating function, adjust the pH value of the waste water to 9, and add dropwise hydrogen peroxide with a mass concentration of 28% in the reactor, and the hydrogen peroxide droplet acceleration rate Controlled at 0.1L / min, the molar ratio of hydrogen peroxide to sulfide in wastewater (based on available chlorine and S 2- Calculate) is 0.2:1, reaction 1h;

[0036] Step 2, adjusting the pH value of the wastewater treated in step 1 to be 2, then adding the bleaching powder with a mass content of available chlorine of 25%, the mol ratio of the bleaching powder and sulfide in the wastewater (in terms of available chlorine and S 2- ) was 2.2:1, the heating reaction temperature was controlled at 25°C...

Embodiment 2

[0041] A method utilizing hydrogen peroxide-bleaching powder to jointly oxidize and degrade sulfides in industrial wastewater, the method comprising the following steps:

[0042] Step 1: Measure 1L of industrial waste water (hereinafter referred to as waste water), add it into a reactor with heating function, adjust the pH value of the waste water to 10, and add dropwise hydrogen peroxide with a mass concentration of 30% in the reactor, and the hydrogen peroxide droplet acceleration rate Controlled at 0.2L / min, the molar ratio of hydrogen peroxide to sulfide in wastewater (based on available chlorine and S 2- Calculate) is 0.4:1, reaction 2h;

[0043] Step 2, adjusting the pH value of the wastewater treated in step 1 to be 5, then adding the bleaching powder with a mass content of available chlorine of 35%, the mol ratio of the bleaching powder and sulfide in the waste water (in terms of available chlorine and S 2- ) was 2.0:1, the heating reaction temperature was controlled ...

Embodiment 3

[0048] A method utilizing hydrogen peroxide-bleaching powder to jointly oxidize and degrade sulfides in industrial wastewater, the method comprising the following steps:

[0049] Step 1: Measure 1L of industrial waste water (hereinafter referred to as waste water), add it into a reactor with heating function, adjust the pH value of the waste water to 11, add dropwise hydrogen peroxide with a mass concentration of 30% in the reactor, and the hydrogen peroxide droplet acceleration rate Controlled at 0.15L / min, the molar ratio of hydrogen peroxide to sulfide in wastewater (based on available chlorine and S 2- Calculate) is 0.6:1, reaction 3h;

[0050] Step 2, adjusting the pH value of the wastewater treated in step 1 to be 7, then adding the bleaching powder with a mass content of available chlorine of 30%, the mol ratio of the bleaching powder and sulfide in the wastewater (in terms of available chlorine and S 2- ) was 1.8:1, the heating reaction temperature was controlled at 3...

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

No PUM Login to View More

Abstract

The invention discloses a method for oxidative degradation of sulfide in industrial wastewater through combined hydrogen peroxide-bleaching powder, belongs to the technical field of industrial wastewater treatment, and solves the problems of high process cost and high potential safety hazards in transportation and storage in a hydrogen peroxide oxidation method. The method comprises the followingsteps: adjusting the pH value of wastewater to 9-12, dropwise adding hydrogen peroxide, carrying out a reaction for 1-3 h, wherein the molar ratio of hydrogen peroxide to sulfide in the wastewater is(0.2-1.2): 1 calculated by available chlorine and S<2->; adjusting the pH value of the treated wastewater to 2-7, then adding bleaching powder into the wastewater, controlling the heating reaction temperature at 25-45 DEG C, and carrying out a reaction for 5-20 min, wherein the molar ratio of the bleaching powder to sulfide in the wastewater is (1.2-2.2): 1 calculated by available chlorine and S <2->. The method effectively solves the problems of high price, difficulty in storage, low oxidation efficiency, long time, insufficient oxidation, high consumption and the like of a single oxidant hydrogen peroxide.

Description

technical field [0001] The invention belongs to the technical field of industrial wastewater treatment, and in particular relates to a method for oxidizing and degrading sulfides in industrial wastewater by using hydrogen peroxide-bleaching powder combined oxidation. Background technique [0002] At present, sulfur-containing wastewater accounts for a large proportion of the total industrial wastewater discharge, and the industries that discharge sulfur-containing wastewater are very extensive, such as printing and dyeing, medicine, tanning, papermaking and other industries, all of which contain a large amount of sulfide. Sulfides refer to compounds formed by metal ions and sulfide ions or hydrogen sulfide ions, including hydrogen sulfide, ammonium sulfide, sodium sulfide, sodium thiosulfate and other non-metallic sulfides and organic sulfides. If these sulfur-containing wastewater are directly discharged into the water body without treatment, the sulfur-containing gas phase...

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
IPC IPC(8): C02F1/72C02F1/76C02F101/10
CPCC02F1/722C02F1/76C02F2101/101
Inventor 王源瑞王军赵坤张彦翠方彦霞展之旺王鑫羽李文惠
Owner NORTHWEST RES INST OF MINING & METALLURGY INST
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com