Supercharge Your Innovation With Domain-Expert AI Agents!

Treatment method of selenium-containing wastewater

A treatment method and waste water technology, applied in the direction of water/sewage multi-stage treatment, adsorption water/sewage treatment, neutralized water/sewage treatment, etc., can solve the problems of high cost and inconvenient operation, and achieve easy operation, wide application, High Selenium Removal Efficiency

Active Publication Date: 2012-02-22
TONGLING NON FERROUS METAL GROUP CORP
View PDF2 Cites 30 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problems of high cost and inconvenient operation in the process of treating selenium-containing wastewater, and provide a selenium-containing wastewater with high selenium removal efficiency, large processing capacity, low cost, simple operation and wide application in industry processing 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
  • Treatment method of selenium-containing wastewater
  • Treatment method of selenium-containing wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] The high-selenium-containing wastewater from the precious metal smelting process is added to the multifunctional reactor 1, and the pH regulator waste sulfuric acid is added according to the acidity of the wastewater to adjust the pH of the raw water to 1, and then industrial sodium sulfide ( ), the high-priced selenium in the waste water is reduced to low-priced selenium and elemental selenium by sodium sulfide and settles down. A baffle-type PH / potential detection arrangement is installed at the outlet of the multifunctional reactor to accurately and stably control the potential of the solution after the reaction at about 80mv. At the same time, in order to avoid the incomplete reaction of various materials in the liquid surface area and direct short-circuit discharge, an inner baffle is set inside the reactor. The solution after the reaction: during continuous operation, it overflows into the sedimentation separation tank 3; if intermittent operation is adopted, the ...

Embodiment 2

[0017] The high-selenium-containing wastewater from the precious metal smelting process is added to the multifunctional reactor 1, and the pH regulator waste sulfuric acid is added according to the acidity of the wastewater to adjust the pH of the raw water to 1, and then industrial sodium sulfide is added. The high-valent selenium in the wastewater is reduced by sodium sulfide to The low-price selenium and elemental selenium settle down, and a baffle-type PH / potential detection arrangement is installed at the outlet of the multifunctional reactor to accurately and stably control the potential of the solution after the reaction at about 80mv. Completely and directly short-circuit the outflow, and an inner baffle is set inside the reactor. The solution after the reaction: during continuous operation, it overflows into the sedimentation separation tank 3; if intermittent operation is adopted, the wastewater at the bottom of the multifunctional reactor 1 is driven into the sedimen...

Embodiment 3

[0021] The high-selenium-containing wastewater from the precious metal smelting process is added to the multifunctional reactor 1, and the pH regulator waste sulfuric acid is added according to the acidity of the wastewater to adjust the pH of the raw water to 1, and then industrial sodium sulfide ( ), the high-priced selenium in the waste water is reduced to low-priced selenium and elemental selenium by sodium sulfide and settles down. A baffle-type PH / potential detection arrangement is installed at the outlet of the multifunctional reactor to accurately and stably control the potential of the solution after the reaction at about 80mv. At the same time, in order to avoid the incomplete reaction of various materials in the liquid surface area and direct short-circuit discharge, an inner baffle is set inside the reactor. The solution after the reaction: during continuous operation, it overflows into the sedimentation separation tank 3; if intermittent operation is adopted, the ...

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 provides a treatment method of selenium-containing wastewater, aiming at providing a treatment method of selenium-containing wastewater, which has the advantages of high selenium removal efficiency, large treatment capability, low cost, simpleness and easiness in operation and capability of wide application in the industry. According to the invention, the selenium-containing wastewater is treated by two stages of selenium removal: in the first stage, after adjusting the pH value of the wastewater to be acidic by using a pH adjusting agent, adding a reducing agent to remove a part of selenium; and in the second stage, adding iron salt and adjusting the pH value of the wastewater by using a pH adjusting agent 2, and carrying out deep selenium remove by utilizing adsorption effect of hydrolysate.

Description

technical field [0001] The invention relates to a method for treating wastewater, in particular to a method for treating selenium-containing wastewater. Background technique [0002] As an important chemical element, selenium has been widely used in industry, agriculture and food hygiene industries. However, due to the duality of the role of selenium on organisms: on the one hand, it is an essential trace element to ensure the health of organisms; on the other hand, the environment and intake of excessive selenium will lead to poisoning and even death of organisms. The safe range of concentrations between ambidexterity is particularly narrow. In order to protect the environment and avoid water pollution caused by the efflux of selenium in industrial wastewater, many countries in the world list selenium as an important environmental impact factor that must be controlled, and clearly stipulate the limit value of selenium content in industrial wastewater. Our country stip...

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): C02F9/04C02F1/66C02F1/70C02F1/28
Inventor 梁海卫朱新生龚昌合
Owner TONGLING NON FERROUS METAL GROUP CORP
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com