Method for preparing chemical active absorbent and method for intensify water treatment thereby

A chemically active, adsorbent technology, applied in the fields of adsorption water/sewage treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problem of increasing water treatment costs, weakening the key barrier function of filtration, and lack of organic matter. Effective removal of problems such as

Inactive Publication Date: 2005-06-29
HARBIN INST OF TECH
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Studies have shown that in the filtration process, the increase of organic matter in the water leads to the ineffective removal of organic matter in the coagulation process, the excessive consumption of chemicals, the filter material in the filter tank is polluted by organic matter, and the adsorption and retention of colloidal impurities are lost. The role of filtration as a key barrier in the process is greatly weakened; turbidity and organic matter are not effectively retained during the filtration process, and more disinfection by-products are produced in the subsequent disinfection process
More deposition, corrosion, smell and secondary pollution caused by the reproduction of viruses and microorganisms will occur in the clean water pool and pipe network, all of which will have a very bad impact on human health
There are many ways to strengthen the removal of organic matter, among which adding powdered activated carbon to the reaction tank is a flexible and effective treatment method, but the price of activated carbon is relatively expensive, and the cost of water treatment will also be greatly increased

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

specific Embodiment approach 1

[0004] Specific embodiment one: present embodiment prepares the chemically active adsorbent like this: (1) a, domestic sewage enters in the mixing tank, adds chemical agent in mixing tank; The reaction tank is reacted, and then the sediment produced in the reaction tank is separated from the mud and water through the sedimentation tank; c, the sludge obtained in the sedimentation tank is dehydrated to obtain chemical sludge, and the chemical sludge is dehydrated at 100 ~ 130 ° C Dry to constant weight, and grind the dry sludge into particles of 0.001-1 mm; (2) Soak the dry sludge particles in acid, and contact them for 1-48 hours under agitation to complete the activation of sludge, in which the sludge and acid The weight ratio is 1: (1~2); (3) Gradually raise the temperature of the activated sludge to 400~1200℃ at a speed of 1~20℃ / min, keep it at 400~1200℃ for 30~180min, and then crush it into particles of 0.001-1 mm to obtain chemically active adsorbents. The chemical sludg...

specific Embodiment approach 2

[0005] Specific embodiment two: this embodiment carries out intensified water treatment like this: (one) raw water enters in the mixing tank, and chemical agent is added in the mixing tank, (two) raw water and chemical agent are mixed and reacted through the reaction tank, Add chemically active adsorbents to the reaction tank, and then separate the sediment produced in the reaction tank through the sedimentation tank for mud-water separation; (3) The treated water obtained in the sedimentation tank is filtered and sterilized through the filter tank and the disinfection tank in turn to obtain qualified effluent . The dosage of the chemical agents is 1-100 mg / L. The chemical agents are iron salts or aluminum salts. The dosage of the adsorbent is 1-500mg / L.

specific Embodiment approach 3

[0006] Embodiment 3: This embodiment is different from Embodiment 2 in that 0-5 mg / L oxidant is added before the chemical agent is added. Other processes are the same as in the second embodiment. The oxidizing agent is one or a mixture of ozone, ferrate, permanganate, chlorine and chlorine dioxide.

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
porosityaaaaaaaaaa
Login to view more

Abstract

The way to produce active attaching dose and the way of handling by strong water, concerns the way of produce active attaching dose using mire in the mire handling craft and the technique of strengthen water handling using the active attaching dose. The way to get the active attaching dose: handling the living dirty water to the solid-liquid separating thing, and filter them to separate the mire and water; heat the mire after filtered, crash them to grains; dip the grains into the acid, finish activating by mixing; heat, crash, then the active attaching dose is made. The way to strengthen the water by active attaching dose is: put the original water into the mixing pond, reaction pond, filtering pond, disinfecting pond, adding chemical dose into the mixing pond, adding mud attaching dose into the reaction pond. The mud attaching dose hydrochloric acid' fusing rate can attain round to 0.25%, NaOH's fusing rate is around 1.05%, after filtered the mud missing rate increase 10%--40%, organic pollution matter missing rate increase 10%--40%.

Description

Technical field: [0001] The invention relates to a method for preparing an active adsorption material from sludge produced in a process of chemically intensified treatment of sewage and a technology for using the active adsorption material to strengthen water treatment. Background technique: [0002] At present, the treatment process commonly used in urban water treatment in my country is: coagulation→sedimentation→filtration→disinfection multi-level barrier process flow, among which coagulation and filtration are the key links to ensure water quality. Studies have shown that in the filtration process, the increase of organic matter in the water leads to the ineffective removal of organic matter in the coagulation process, the excessive consumption of chemicals, the filter material in the filter tank is polluted by organic matter, and the adsorption and retention of colloidal impurities are lost. The role of filtration as a key barrier in the process is greatly weakened; tur...

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): B01J20/00C02F1/28C02F11/00
Inventor 许国仁
Owner HARBIN INST OF TECH
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