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

Method for treating sewage by modified settling agent strengthening flocculation/coagulation

A settling aid and modification technology, applied in the field of water supply and drainage technology and environmental protection, can solve the problems of low adsorption efficiency of quartz sand aid and poor adsorption capacity on particle surface, and achieve improved adsorption and capture capacity and fast settling speed. , strong adsorption effect

Inactive Publication Date: 2011-01-19
KUNMING UNIV OF SCI & TECH
View PDF3 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problems of low adsorption efficiency of quartz sand sedimentation aid and poor particle surface adsorption capacity, the present invention proposes a new sewage treatment technical solution:

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1: Carry out flocculation / coagulation treatment on a certain industrial wastewater A containing fine suspended matter.

[0030] Pretreatment of quartz sand sedimentation aid. Soak the quartz sand sedimentation aid with a particle size of 300 mesh to 200 mesh in a solution of 1% organic polymer flocculant for 15 minutes, and the mass volume ratio of quartz sand to organic polymer flocculant solution is 3kg / 10L.

[0031] Put the new sedimentation aid and flocculation / coagulant into the sewage, and the ratio of the amount of quartz sand added to the sewage is 10kg / t of water. Stir at a slow speed for 3 minutes, and control the speed at 30r / min.

[0032] Combined with the flocculation / coagulation agent, the sedimentation aid is added in the early stage of the sewage flocculation / coagulation, the hydraulic retention time of the sewage in the sedimentation tank is 30 minutes, and the removal rate of suspended matter is 98.7%.

Embodiment 2

[0033] Example 2: Carry out flocculation / coagulation treatment on a mineral processing wastewater B containing fine suspended matter.

[0034] Pretreatment of quartz sand sedimentation aid. Soak the quartz sand sedimentation aid with a particle size of 200 mesh to 100 mesh in the organic polymer flocculant solution with a concentration of 0.1% for 3 minutes, and the mass volume ratio of the quartz sand to the organic polymer flocculant solution is 5kg / 10L.

[0035] Put the new sedimentation aid into the mineral processing wastewater, and the ratio of the amount of quartz sand added to the waste mineral processing water is 10kg / t water. Stir at a slow speed for 10 minutes, and the speed is controlled at 80r / min.

[0036] Use this settling aid in combination with flocculation / coagulation agent, and add this settling aid at the later stage of flocculation / coagulation. The hydraulic retention time of mineral processing wastewater in the sedimentation tank is 50 minutes, and the ...

Embodiment 3

[0037] Example 3: Flocculation / coagulation treatment is performed on certain domestic sewage C containing fine suspended matter. Pretreatment of quartz sand sedimentation aid. Soak the quartz sand sedimentation aid with a particle size of 300 mesh to 200 mesh in the organic polymer flocculant solution with a concentration of 0.5% for 30 minutes, and the mass volume ratio of the quartz sand to the organic polymer flocculant solution is 3kg / 10L.

[0038] Put the new sedimentation aid and flocculant into the domestic sewage, and the ratio of the amount of quartz sand added to the sewage is 2kg / t water. Stir at a slow speed for 2.5 minutes, and control the speed at 50r / min.

[0039] Use this settling aid in combination with flocculation, add this settling aid in the middle of flocculation, the hydraulic retention time of sewage in the sedimentation tank is 30 minutes, and the removal rate of suspended solids is 99.2%

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
Granularityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for removing impurities such as suspended matters and colloids and the like in water by adding a modified settling agent by the action of flocculating / coagulating sedimentation, and belongs to the technical field of water supply and drainage technology and environmental protection technology. The method comprises the following steps of: soaking the settling agent of silica sand particles with the grain size of 50 to 300 meshes in 0.1 to 5 percent solution of organic macromolecular flocculant / coagulant for 0.5 minutes to 48 hours, wherein the surface of the soaked silica sand is coated with and adsorbs a layer of molecular long chains of the organic macromolecular flocculant / coagulant; putting the treated particles of settling agent into the water to be treated at proper time, and slowly stirring the mixed solution for 0.5 to 30 minutes, wherein the rotary speed is controlled to 20 to 100r / min, so that the pretreated particles of settling agent are fully contacted with the suspended matters in the sewage; and stopping stirring, standing for sedimentation for 1 to 60 minutes and performing solid-liquid separation so as to remove the suspended matters in the sewage by coagulation efficiently. The method has the advantages of high capturing capability of the settling agent, stable structure of floccules, low water content, quick settlement of floccules and good treating effect, and can obviously reduce the using amount of the flocculant / coagulant or improve the flocculation / coagulation effect.

Description

technical field [0001] The invention relates to a treatment method for removing impurities in water, in particular to a treatment method for removing impurities such as suspended solids and colloids in water by adding a modified settling aid and using flocculation / coagulation precipitation, and belongs to the technical fields of water supply and drainage and environmental protection. Background technique [0002] Flocculation / coagulation is to change the surface characteristics of colloidal particles by adding chemicals, so that dispersed colloidal particles aggregate to form large particles and precipitate (or float). The main mechanism of action is: electrical neutralization / adsorption, adsorption bridging , Volume sweep flocculation, etc. In today's water treatment flocculation / coagulation process, adding appropriate sedimentation aids according to needs can often improve the flocculation / coagulation effect and reduce the settling time. [0003] According to the material...

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): C02F1/56
Inventor 徐晓军陈映雪白荣林李新征安正阳罗发生
Owner KUNMING UNIV OF SCI & 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