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

A method for coagulation treatment of mining wastewater with microbial flocculant and surfactant

A technology of microbial flocculants and surfactants, applied in the field of wastewater treatment, can solve the problems of large amount of microbial flocculants and long flocculation time, and achieve good treatment effect, extensive culture conditions, and increase the effect of settling speed.

Inactive Publication Date: 2018-03-13
TAIYUAN UNIV OF TECH
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to provide a method for coagulation treatment of mining wastewater with microbial flocculants and surfactants, which solves the problems of large amount of microbial flocculants and long flocculation time.

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
  • A method for coagulation treatment of mining wastewater with microbial flocculant and surfactant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Prepare simulated wastewater: prepare a suspension of 30 g / L with pure quartz minerals with a particle size of less than 0.074 mm, and the pH value is 7.1. The negatively charged quartz on the surface is difficult to settle naturally due to electrostatic repulsion.

[0030] The specific steps for treating wastewater are as follows:

[0031] ⑴ Silicate bacteria are used as strains, and the strains are inoculated into 100 mL of liquid medium (sucrose 5.0 g / L, Na 2 HPO 4 2.0 g / L, MgSO 4 •7H 2 O 0.5 g / L, FeCl 3 0.005 g / L, CaCl 2 0.1 g / L, kaolin 0.5g / L) in a 250 mL Erlenmeyer flask, adjust the pH of the medium to 7.3, culture in a shaker at 150 r / min for 72 h to obtain a silicate bacteria culture solution;

[0032] The culture solution was centrifuged at 6000 r / min for 20 min, then added twice the volume of pre-cooled ethanol and mixed until a flocculent precipitate was formed, centrifuged at 3000 r / min for 15 min, washed three times with pre-cooled ethanol, and agai...

Embodiment 2

[0037]Wastewater to be treated: the concentration of slime particles in the slime water is 34g / L, the pH value of the slime water is 8.3, the concentration of suspended solids in the slime water is high, the content of fine particles is high, the ash content is low, and natural settlement is difficult. The particle size and composition analysis are as follows:

[0038]

[0039] The specific steps for treating wastewater are as follows:

[0040] ⑴ Silicate bacteria are used as strains, and the strains are inoculated into 100 mL of liquid medium (sucrose 6.0 g / L, Na 2 HPO 4 3.0 g / L, MgSO 4 •7H 2 O 0.7 g / L, FeCl 3 0.005 g / L, CaCl 2 0.2 g / L, kaolin 0.25 g / L) in a 250 mL Erlenmeyer flask, adjust the pH of the medium to 6.5, and culture in a shaker at 200 r / min for 96 h to obtain a silicate bacteria culture solution. After centrifuging at 5000 r / min for 30 min, add twice the volume of pre-cooled ethanol and mix until flocculent precipitates are formed, centrifuge at 4000...

Embodiment 3

[0045] Preparation of simulated wastewater: kaolin with a particle size of less than 0.045mm accounting for 83% was prepared into a 10 g / L suspension with a pH value of 6.8. Natural settlement of such clay mineral suspensions is difficult.

[0046] The specific steps for treating wastewater are as follows:

[0047] (1) Silicate bacteria are used as strains, and the strains are inoculated into 100 mL of liquid medium (sucrose 4.0 g / L, Na 2 HPO 4 1.5g / L, MgSO 4 •7H 2 O 0.5g / L, FeCl 3 0.008 g / L, CaCl 2 0.15 g / L, kaolin 0.70 g / L) in a 250 mL Erlenmeyer flask, adjust the pH of the medium to 7.3, and culture it in a shaker at 180 r / min for 72 h to obtain a silicate bacteria culture solution. After centrifuging at 6000 r / min for 30 min, add twice the volume of pre-cooled ethanol and mix until flocculent precipitates are formed, centrifuge at 2000 r / min for 25 min, wash with pre-cooled ethanol three times, and centrifuge again at 4000 r / min After 50 minutes, vacuum-dry at 42°...

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 coagulation treatment of mining industry wastewater by means of a microbial flocculant and a surfactant and belongs to the technical field of wastewater treatment. The method comprises steps as follows: firstly, a silicate bacterium flocculant is prepared, the surfactant is added to the wastewater to be stirred, then the silicate bacterium flocculant is added to the wastewater, and pH is adjusted, so that fine solid particles in the wastewater are flocculated and settled. With the adoption of the method, suspended solids in the wastewater can be effectively deposited, the microbial flocculation efficiency is improved, the flocculation time of the microbial flocculant is shortened, the method has good treatment effects on slime water and coal-washing wastewater of coal preparation plants and suspensions containing clay minerals, silicate bacteria for producing the microbial flocculant are extensive in culture condition and environment-friendly, and the surfactant is high in degradability and free of secondary pollution.

Description

technical field [0001] The invention relates to a method for coagulating mining wastewater with a microbial flocculant and a surfactant, and belongs to the technical field of wastewater treatment. Background technique [0002] Water resources are an indispensable and important resource in human production and life, and are also environmental resources on which organisms depend for survival. The water resource problem caused by the aggravation of the water resource crisis and the continuous deterioration of water environment quality has become one of the environmental problems that have attracted much attention in the world today. one. Flocculation technology is an economical and convenient water treatment method widely used in industrial production. The flocculation effect mainly depends on the flocculant. According to different chemical components, flocculants can be divided into inorganic flocculants, organic flocculants and biological flocculants. Inorganic polymer floc...

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 Patents(China)
IPC IPC(8): C02F3/34
CPCC02F3/34C02F3/341C02F2305/04
Inventor 杨志超孙蓓蕾张素红郭建英王伟
Owner TAIYUAN UNIV OF TECH
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