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

Advanced treatment and reuse method of pre-coated membrane of tail water of sewage plant

A technology of advanced treatment and pre-coating film, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, permeation/dialysis water/sewage treatment, etc. Reduce direct contact, reduce operating costs, and realize the effect of resource utilization

Active Publication Date: 2014-08-06
JIANGSU PROVINCIAL ACAD OF ENVIRONMENTAL SCI
View PDF11 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, membrane concentrated water has the characteristics of high salt content and poor biodegradability, so it is relatively difficult to treat

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
  • Advanced treatment and reuse method of pre-coated membrane of tail water of sewage plant
  • Advanced treatment and reuse method of pre-coated membrane of tail water of sewage plant
  • Advanced treatment and reuse method of pre-coated membrane of tail water of sewage plant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0036] The tail water of a sewage treatment plant in an industrial park has the following water quality characteristics: COD 55 mg / L, TN 17.3 mg / L, UV 254 0.232cm -1 , turbidity 2.6, conductivity 5610μs / cm. The specific process of advanced treatment and reuse of tail water precoating film is as follows: figure 1 As shown, firstly, the tail water after secondary biochemical treatment is sent to the regulating tank for homogenization, and then passed through a quartz sand filter to remove larger particles of suspended impurities in the wastewater; zeolite powder is added as a pre-coating film material through a dosing device, The particle size is 2000 mesh, the dosing amount is 200 mg / L, the solution containing the pre-coating membrane material and the sand filter water pass through the ultrafiltration membrane together, the ultrafiltration membrane is a hollow fiber membrane, and a precision filter with a filtration accuracy of 10 μm is installed in front of the membrane modu...

Embodiment example 2

[0040]The tail water of a sewage treatment plant in an industrial park has the following water quality characteristics: COD 42 mg / L, TN 13.6 mg / L, UV 254 0.207cm -1 , turbidity 1.5, conductivity 3950μs / cm. The specific process of advanced treatment and reuse of tail water precoating film is as follows: figure 1 As shown, the tail water after the secondary biochemical treatment is first sent to the regulating tank for homogenization, and then passed through the quartz sand filter to remove the larger particles of suspended impurities in the wastewater; activated carbon is added as a pre-coating film material through the dosing device, and the particles The diameter is 500 mesh, the dosing amount is 100mg / L, the solution containing the pre-coating membrane material and the sand filter water pass through the ultrafiltration membrane together, the ultrafiltration membrane is a hollow fiber membrane, and a precision filter with a filtration accuracy of 30μm is installed in front ...

Embodiment example 3

[0044] The tail water of a sewage treatment plant in an industrial park has the following water quality characteristics: COD 60 mg / L, TN 19.5 mg / L, UV 254 0.271cm -1 , turbidity 3.1, conductivity 6630μs / cm. The specific process of advanced treatment and reuse of tail water precoating film is as follows: figure 1 As shown, the tail water after the secondary biochemical treatment is first sent to the regulating tank for homogenization, and then passed through the quartz sand filter to remove the suspended impurities of larger particles in the wastewater; diatomite is added as a pre-coating film material through the dosing device , the particle size is 1000 mesh, and the dosing amount is 400 mg / L. The solution containing the pre-coating membrane material and the sand-filtered water pass through the ultrafiltration membrane together. The ultrafiltration membrane is a hollow fiber membrane. filter, the concentrated water from the ultrafiltration membrane is returned to the regul...

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
Conductivityaaaaaaaaaa
Conductivityaaaaaaaaaa
Conductivityaaaaaaaaaa
Login to View More

Abstract

The invention discloses an advanced treatment and reuse method of a pre-coated membrane of tail water of a sewage plant. The method comprises the following steps: firstly, feeding tail water into an adjusting pool so as to be homogenized, and then passing through a sand filter; passing through an ultrafiltration membrane by a solution containing a pre-coated membrane material and sand filtered effluent and effectively forming a dynamic membrane on the surface of the ultrafiltration membrane, wherein concentrated water of the ultrafiltration membrane returns to the adjusting pool while the effluent enters into a middle water tank; backwashing the ultrafiltration membrane through a pump by part of water in the middle water tank periodically, wherein the pre-coated membrane automatically falls and the sediment of the coating material is recycled to a pre-coated membrane material dosing device repeatedly, so that the operating cost is lowered; entering into reverse osmosis membrane treatment by water in the middle water tank, fresh reverse osmosis membrane is used as industrial water in the park to be returned, and the concentrated water is treated by an electrochemical reactor, and the effluent reaches the standard to be discharged. By adopting the pre-coated membrane method, the ultrafiltration backwashing frequency is low, and the water yield of the ultrafiltration membrane is improved. Loose filter cake layers with great holes can be formed to effectively relieve the rate of descent of membrane flux, improve the anti-pollution capacity of the membrane and improve the removal effect of the membrane on the water quality index at the same time.

Description

technical field [0001] The invention belongs to the field of sewage advanced treatment and reuse engineering, and relates to a method for advanced treatment and reuse of tail water of industrial park sewage plants. Background technique [0002] The increasingly tense water resource shortage and water environment pollution have attracted great attention both at home and abroad. Industrial sewage recycling is an effective way to alleviate the shortage of water resources, reduce the degree of water pollution, and improve the ecological environment. How to rationally and effectively comprehensively utilize sewage resources in the park has become the key to solving the problems of water resource utilization and water environment pollution in the park. . The main water quality indicators of the tail water of industrial park sewage plants, such as organic matter, ammonia nitrogen, and salinity, cannot meet the reuse standards and require further advanced treatment. Membrane separ...

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): C02F9/06C02F1/44
Inventor 涂勇陈勇白永刚唐敏刘伟京吴海锁
Owner JIANGSU PROVINCIAL ACAD OF ENVIRONMENTAL SCI
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