Processing method of landfill leachate film concentrated solution

A technology of landfill leachate and treatment method, which is applied in the field of treatment of landfill leachate membrane concentrate, can solve the problems that the recovery efficiency cannot be further improved, the concentrate is not softened thoroughly, and scaling is easy to occur, so as to achieve strong practicability and reduce The probability of clogging and the effect of improving the treatment effect

Inactive Publication Date: 2015-05-06
浙江博世华环保科技有限公司 +1
View PDF5 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although the above methods have improved the recovery efficiency of the landfill leachate membrane concentrate to a certain extent, because the above method only undergoes a first-level softening treatment before the membrane treatment, the heavy metal ions and calcium and magnesium ions in the concentrate are precipitated. A certain amount of heavy metal ions and calcium and magnesium ions still remain in the concentrated solution, so that the concentrated solution is not completely softened, and after passing through the microfiltration membrane, it enters the subsequent reverse osmosis, which makes the reverse osmosis prone to fouling, and the recovery efficiency of the above method cannot be further improved. improve

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
  • Processing method of landfill leachate film concentrated solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The combined process disclosed by the invention is used to treat the leachate membrane treatment concentrate of a waste incineration plant.

[0033] The CODcr concentration of the concentrated liquid after membrane treatment in the incineration plant is 1600mg / L, the total hardness content is 2000mg / L, the conductivity is 30000μs / cm, and the pH is 7.0.

[0034] (1) Get 5 tons of membrane treatment concentrated solution, add technical grade calcium hydroxide to the membrane treatment concentrated solution, adjust pH to be 10.5, obtain mixed solution;

[0035] (2) Sodium hydroxide is passed into the mixed solution of step (1), and the pH is controlled to be 11.5, and magnesium sulfate is added to obtain a mixed solution containing precipitation;

[0036](3) The mixed solution containing precipitation in step (2) is passed into the settling tank for precipitation to obtain 450L of high sedimentation liquid and supernatant with mud content, and then add soda ash in the supe...

Embodiment 2

[0043] The combined process disclosed by the invention is used to treat the leachate membrane treatment concentrate of a landfill site.

[0044] The CODcr concentration of the concentrated liquid after membrane treatment in the landfill is 1100mg / L, the total hardness content is 3200mg / L, the conductivity is 28900μs / cm, and the pH is 7.0.

[0045] (1) Get 5 tons of membrane treatment concentrated solution, add technical grade calcium hydroxide to the membrane treatment concentrated solution, adjust pH to be 10.5, obtain mixed solution;

[0046] (2) Sodium hydroxide is passed into the mixed solution of step (1), and the pH is controlled to be 11.5, and magnesium sulfate is added to obtain a mixed solution containing precipitation;

[0047] (3) The mixed solution containing precipitation in step (2) is passed into the settling tank for precipitation to obtain 450L of high sedimentation liquid and supernatant with mud content, and then add soda ash in the supernatant to make 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

PropertyMeasurementUnit
pore sizeaaaaaaaaaa
concentrationaaaaaaaaaa
concentrationaaaaaaaaaa
Login to view more

Abstract

The invention discloses a processing method of landfill leachate film concentrated solution. The processing method comprises the following steps of: (1) softening the landfill leachate film concentrated solution and then carrying out micro-filtration, to obtain trapped fluid and penetrating fluid; and (2) filtering the penetrating fluid by a DTRO (disk tubular reverse osmosis) membrane and then discharging directly; wherein the softening process comprises the following steps of: (a) adding calcium hydroxide into the landfill leachate film concentrated solution, adjusting pH value to 10-10.5; (b) adding sodium hydroxide and magnesium salt, adjusting the pH value to 11-12; and (c) settling, carrying out solid-liquid separation, carrying out plate-frame pressure filtration on the solid phase, and returning the filtrate to the step (1); adding a precipitant into the liquid phase, controlling the content of calcium and magnesium ions to be less than 20mg / L, and controlling the content of soluble silicon dioxide to be less than 10mg / L, and then carrying out micro-filtration. By utilizing the method, the content of heavy metal ion, calcium and magnesium ions in the concentrated solution can be reduced furthest, the scaling problem in the subsequent film system is controlled effectively, and therefore the recovering efficiency of the landfill leachate film concentrated solution is improved.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a method for treating landfill leachate membrane concentrate. Background technique [0002] At present, water pollution has seriously restricted my country's economic development, social progress and improvement of people's living standards, and it is very urgent to solve the problem of water pollution. In 2003, more than 200,000 tons of waste water was discharged for every 100 million yuan of GDP produced in my country, which was an increase of 84.8% compared with 1990; the aggravation of environmental pollution has continuously increased the cost of environmental governance. For this reason, my country's annual investment in environmental governance exceeds 100 billion yuan, accounting for about 2% of the country's GDP; it can be seen that water pollution has a great impact on my country. Among the many waste waters, landfill leachate has always been a difficult probl...

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): C02F9/04
CPCC02F9/00C02F1/001C02F1/444C02F1/5245C02F1/66
Inventor 陈昆柏王立江余天云沈斌刘帅盛浩黄卓敏
Owner 浙江博世华环保科技有限公司
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